Backup terminology. Backup: Best Practices for Different Tasks Differential Incremental Backup

New, incremental and differential backups

Acronis Backup & Recovery 11 is capable of using popular schemes backup, such as "Did-Batko-Sin" and "Hanoi Tower", as well as the creation of backup schemes. All backup schemes are based on incremental, incremental and differential backup methods. The term "scheme" really means the algorithm for logging these methods in conjunction with the archive cleaning algorithm.

Comparison of backup methods among themselves has no sense, shards from the scheme stink from marriage. The skin method is guilty of victoriously playing a viable role to its own advantage. A competent backup scheme allows you to beat the odds of all methods, replacing the influx of their shortcomings. For example, more creation of differential backups makes it easier to clean up the archive, the fragments of them can be easily seen at once with a set of available incremental backups, which are saved during the day.

Backup for additional methods of full, incremental and differential backup creates a backup copy of a single type.

New backup copy

The new backup saves all data selected for backup. A new backup is the basis of any archive and forms the basis for incremental and differential backups. The archives can replace a few of the latest backup copies, or they can be made up of less of them. A new backup copy is self-sufficient: in order to verify data, access to any other backup copy is not required.

It is widely seen that a new backup copy is the best for collation and the best for renewal. For additional technology Acronis renewal From an incremental backup, you can recover just as easily, as if from a new one.

Outer reserve copy of the most beautiful in the attacking fall:

• it is necessary to update the system until the end of the year,
• The output camp changes rarely, which does not require a regular backup.

Apply: an Internet cafe, a school or a university laboratory, a de administrator often checks for changes, broken by students or guests, and rarely updates the base backup copy (only after a software update is installed). The hour of creating a backup copy in this period is not critical, but the hour of renewal will be minimal, so that you can restore the system from a new backup copy. For the security of additional responsibility, the administrator can make a copy of backup copies.

Incremental backup

Changes to data are saved in an incremental backup to the rest of the backup. To restore data from an incremental backup, access to other backups of the same archive is required.

Incremental backup copy of the best image in the offensive fall:

• it is necessary to renew one of the dekilkoh savings stations,

It is widely seen that the incremental backup copies are smaller than the original, lower, broken ones, and one copy has been put into a "lancet", the next copy can no longer be broken. Keeping a few of the latest backup copies is not the best option, as it is necessary for the mother of a little of the previous versions of the data, so the hope of the great archive is more sumnivnish.

Example: backup copy of the transaction database log.

Differential backup

Differential backup saves data changes the rest of the full backup. To restore data from a differential backup, access to a full backup is required. Differential backup copy of the best in the offensive:

• it is necessary to save the rest of the camp of these,
• Changes in data are not very large, due to the large size of data.

Sounds important that "differential backups are created more and more quickly, and incremental backups are created more and more". Really there is no physical difference between the incremental backup copy, to add to the new, and differential copy, to add to the new backup copy, at that very moment in time. The difference between the transfers was created, that the differential backup copy was created after (or vice versa) the creation of a number of incremental copies.

Incremental or differential backup, created after disk defragmentation, may be significantly larger, lower sound, so that during the defragmentation process, file expansion on the disk is changed and the backup copy changes. After defragmenting a disk, it is recommended to create a new backup copy.

At the offensive table, there is a significant difference in the prevalence of the dermal type of backup. Really, these parameters lie in the presence of rich factors, such as general, speed and nature of the data change, their nature, physical characteristics of the outbuildings, backup parameters and renewal are installed. The best teacher in choosing the optimal backup scheme is the confirmation.

With an additional (“incremental”) backup, only copies of these files are copied, as if they were changed from quiet fir, as the rest of the time, it was done again, or the additional backup was copied. Next, incremental backups add more files, as if they were changed from the previous one. In an average, incremental backup, copying takes less than an hour, shards are copied less than files. Prote, the process of restoring data takes more than an hour, but it may be possible to restore the data of the remaining complete backup, plus the data of all incremental backups. If so, on the vіdmіnu vіd differential kopiyuvannya, zmeni or new files do not replace the old ones, but are added to the original one independently.

cloning

Cloning allows you to copy the entire distribution or the nose (attachments) with the files and directories to another division or the other nose. If it was divided into exciting, then cloning was also divided into exciting.

Backup at a glance

The image is an exact copy of everything that has been distributed or carried (attached) that is collected in one file.

Backup in real time

Backup copying in real time mode allows you to create copies of files, directories and volumes without interrupting the robot, without restarting the computer.

Rotation schemes.

Changing the working set of noses in the process of copying is called their rotation. For backup copying, it is even more important to choose a scheme for rotating noses (for example, magnetic lines).

One-time copy the simplest scheme, yak not transferring the rotation of the nose. All operations are carried out manually. Before copying, the administrator sets the hour for the first time of the backup copy, redistributing the file system or directories, as it is necessary to copy. This information can be stored in the database, so that it can be retrieved again. In case of a one-time copying, it is most likely that outside copying will be blocked.

Simple rotation Simple rotation transfers that the number of lines is scored cyclically. For example, the cycle of rotation can become daily, then the same day you see the singing working day of the day. Nedolіk tsієї schemes - won't be suitable for archiving, oscillki kіlkіst nоїїv in the archives shvidko zbіlshuєtsya. In addition, incremental/differential recording is carried out on your own nose, which leads to their significant depreciation and, as a last resort, zbіshuє ymovіrnіst vіdmovi.

"Dida, father, son" qia scheme maє ієrarchіchnu structure and transferring the choice to the set of three sets of noses. I need to try again a copy of the computer's disks ( "father"), while incremental (or differential) copying is carried out ( "syn"). Dodatkovo once a month, one more copying is carried out ( "did"). The warehouse of the stock and the stock of goods is fast. In this order, compared with simple rotation in the archives, there are only a few thousand copies plus the remaining few copies. Not enough money for the scheme for those who spend less data from the archives, who were like a month, and wind up the nose.

"Hanoi Vezha" Scheme poklikana usunut deyaki z nedolіkіv schemes of simple rotation and rotation "Did, dad, son." The scheme was inspired by the number of nose sets. Skin set of assignments for the tyzhny copy as in the scheme of simple rotation, but without the need to copy the new copies. In other words, the number of dials includes the ones with the new standard copy and the ones with the usual incremental (differential) copies. A specific problem of the “Hanoi Tower” scheme is that it is more collapsible, lower in other schemes.

"10 sets" This scheme is insured for ten sets of noses. The period of forty days is divided into ten cycles. The protyazh cycle for the skin set is fixed one day of the week. After the next cycle, the dialing number is charged for one day. In other words, if the first cycle for Monday dialed number 1, and for the second - number 2, then the other cycle for Monday dialed number 2, and for the second - number 3. wear and tear between the wearers.

Schemes of "Hanoi Tower" and "10 Sets" are rarely used, but fragments of a lot of backup systems do not support them.

Taking a backup

1. Line to streamer - write backup data to magnetic line to streamer;

2. "Gloomy" backup" - recording backup data for "gloomy" technology through the online services of special providers;

3. DVD or CD - recording backup data on compact discs;

4. HDD - write backup data to hard drive computer;

5. LAN - recording backup data on any machine in the middle local lines;

6. FTP - recording backup data on an FTP server;

7. USB - recording backup data on any USB-storage device (such as a flash card or a hard drive);

8. ZIP, JAZ, MO - backup to ZIP, JAZ, MO floppy disks.

At the same time, not all data (files, sectors, etc.) are copied, but only those that were changed from the moment of the rest of the backup. To fix the time of copying, different methods can be stopped, for example, for systems under the protection of operating systems of the Windows family, a different attribute of the file (archived bit) is selected, which is restored, if the file is changed, and is dropped by the backup program. In other systems it is possible to change the file change date. It seems that the scheme for zastosuvannyam of this type of backup will be inaccurate, as it is sometimes carried out outside of the backup. With a full backup of the system, it is necessary to carry out a backup from the remaining copies created by the Full backup, and then restore the data from the incremental copies in the order of their creation. Tsey view vikoristovuetsya in order to speed up the speed of the archival copies, which are stained, on the outbuildings to collect information (for example, to speed up the number of vikoristovuvanih strichkovyh noses). It is also allowed to minimize the hour of the backup, so that you can be very respectful of the minds, if the machine is running smoothly, or you can download great information. Incremental copying can be one nuance: step by step updating and turning deleted files for the renewal period. For example: admissible, on weekdays there are more copies made, and on weekdays incrementally. Koristuvach created the file on Mondays, changed it on the second, changed it on the Wednesday, removed it on the fourth. So, during the last step-by-step renewal of data for the current period, we take two files: with the old names for the second time before the change, and with the new names, we will create in the middle. What happened to those who saved incremental copies from different different versions to the same file, and as a result, all options will be updated. Therefore, with the last update of data from the archive “yak є”, it is possible to reserve more disk space, so that deleted files could be placed.

Advantages of the method:

Efficient backup - Save less files, change from the rest of the full or incremental backup, backups take less space.

Least hour of backup and renewal - Incremental backup takes less than an hour, lower than that of differential backup.

Shortcomings of the method:

Backup data is saved on a number of occasions - Reserve copies are sorted on a number of occasions, after an accident, it may take more than an hour. In addition, for effective renewal of the practicality of the system, the nose can be completed in the correct order.

For a long period of time, various backup technologies were expanded in order to reduce to a minimum the amount of space on the disk necessary for taking backup copies of files, and to reduce the amount of traffic required to copy files to external resources (computer disks) . It is easy to get lost in the diversity of backup methods that are propagated by programs, the terminology shards are often not understood at first glance and do not describe the specifics of the methods. In addition, sometimes, at first glance, it is important to understand the advantages and disadvantages of any technology. This article is a helper, which will allow you to speak in certain terms, as well as in their powers, advantages and nedolіka.

Note: At whose helper to induce more of the main winning methods for this day. Knowledge of these areas of congestion, obmezhen, features, advantages and shortcomings will be more low enough, so you can choose a solution for organizing backup copying on a computer.

General backup methods

Other backup techniques

1. New backup

Tse same those, how to sound. Why is a copy of all data, like a koristuvach chooses the hour of setting up a backup copy. Call the copied files located in one archive file and squeeze them in order to change the size of the sub-bag backup copy. So, if a new backup copy is created, all files are copied from the folder to the archives. Whomever is coming has one important problem. Irrespective of those that you have changed or have added all the files, the launch of the backup task will lead to recopying files, which in the end bag will appear not only on the triviality of the operation, but also on the disk space, even the skin copy will avenge the mass of duplicating files, as they do not change from copy to copy. You, obviously, can see old copies for the splendid month, but in an hour everything will be stained richly. In addition, if you want to save backups on distant resources, then, at the very least, the copy itself will appear on the traffic that flows.

For a richer idea, it would be better to make a new copy of the data once, and then it would be less to add or change other files on a regular basis. I use a few methods, how to implement this idea, and are described below.

Advantages and shortcomings of the creation of new backup copies

• Shvidke revival of all files- If you need to re-update a copy of the files, then it is easier to do it with one archive file
• New backup copies take a lot of time and take a lot of time- New copies are not suitable for regular backup, for example, regular or regular backup.

After creating an archive with a new backup of a different differential backup, it helps to change the size of the upcoming copies, working them on the basis of a differential backup of the original files with the files from the remaining backup. If the files are added or changed, they are copied to the archive archives by order from a full copy. It is important to understand that differential backup copies are accumulative. The skin differential backup saves in backup everything that is taken from the moment of the remaining backup copy, so that these files were already included before the front differential copy. Tim is not smaller, navit z zim zamezhennyam, differential backups are created more quickly and take less space, lower with more than one full backup. Therefore, this method is best suited for occasional or frequent regular backup tasks.

Advantages and shortcomings of differential backup

• Shvidka's renewal was repaired with other methods- For a full backup of all files from a backup copy, you will need only two archives: the archives with a full copy and the remaining differential backup.
• Differential backups take up more space compared to their counterparts- It's better to cheat, allowing you to more effectively cheat space on the disk and create backup copies faster, lower when creating a new backup copy, but still, this method is still to avenge excess data.
• The skin of the offensive differential backup is significantly growing- Since the files are only aligned with the full backup, then sooner the differential backup will be aligned with the full backup. At such a time, it is necessary to work again again with a copy of the files and start the process again (sound, wink in automatic mode).

The incremental backup method is similar to the differential backup method, but there is one important thing - saving less excess data from backups. The skin of the incremental backup will remove only those files, if they were created or changed from the moment of the remaining creation of the new copy or the remaining incremental backup. Such backups save a lot less oversized data, equal to differential backups, but still the effect of the incremental backup is still present, so incremental backups can replace files, as if they were in the same year, incremental copies Incremental backups are especially good for making frequent backups, for example, for example.

Advantages and shortfalls of incremental backups

• Incremental backups fold more, lower differential- For the appearance of the previous changes made, such backups save less overworld information and that is what happens more richly.
• Incremental backups smaller than differential backups- For the appearance of the quiet of the front changes themselves, such backups save less information
• You can create more incremental backups, lower differential ones- Since backups save less supra-mundane information, then they can be richer more between full copies, lower at the same time with differential copies.
• Incremental copies are updated earlier, lower at different differential ones- To restore the files, it is necessary to extract them from a new copy, and then sequentially zastosuvat all subsequent incremental backups.
• Risk movement- Even if one of the incremental copies of the bula was lost or deleted, it will not be possible to update the files from the same copy, after which the changes in the files will be irrevocably used and the files will be added. It is still possible to reproduce data from smaller incremental copies.

The concept of "delta" is often referred to as a differential backup method, but is sometimes also called "delta backup", "delta block backup" and "delta style backup". І basically, all the cі іntelnost vіdnosjatsya to odnієї і і ієї zh tekhnologii svorennja srednevoї kopiї. The delta method should be more correctly called delta block backup, as it should be linked with incremental and differential approaches. It is important that the delta block backup method zastosovuetsya only changed files, but not creations. Added files, of course, are also saved in copies, but in the original mode.

The previously described backup methods create a new copy of the changed file, so that the new one has changed only one character. Obviously, such a pidhіd does not add up to special problems, so it’s about small text documents, but if you look at great files, such as database data, such a pidhid will be even more problematic. For example, mail clients, like Outlook, most often save all the information in one great file (sheets, contacts, etc.). If you want to go out, if you have taken one sheet, then the previous methods will be confused to create a copy of the entire file. And the oskіlki such files can often be changed, then no matter how biphidhid you did not zastosovuly, your backups will grow irresistibly small and lead to the accumulation of a great amount of superfluous information.

Delta block backups allow you to deal with these problems by creating backup copies of only a few parts of the files that have been changed, rather than the entire file. The essence of the method is simple. After the file is split into blocks of new expansions, and then the backup copies of the blocks of the changed file are compared with the blocks of the file in the new backup copy. As a result, only those blocks should be used in the backup copy, as they were changed or added to the file. The term delta can lead you into oman, so as in the fallacy of the ways to get stuck, instead of creating backups, you can be different. In the case of the differential method, in the archive, a new copy will be displayed, and in the case of the incremental method, in the archive, the difference in the rest of the archive will be replaced by the file. Obviously, the advantages of that shortfall will be the same as those of the methods, in connection with which the delta is stagnant. However, at the time of incremental copying, the risk of wasting information will be greater, but the loss of incremental backups means that it is impossible to stop changes from all upcoming incremental backups (because it is not possible to guarantee that the coming changes will be stopped correctly).

Note: Expand the block to the stale program or select a shortened border, as well as support the program. Call the block size range from 1 to 32 kilobytes.

Delta is especially kind to zastosovuvat in technologies, de files are reserved every time after creation or change. Tsey pіdhіd also vіdomiy yak reservirovannya in real time or uninterrupted zahistu danih. The Delta is so very worthy to win, if the backup copies are saved on distant resources (servers, collections) in the minds of the fenced capacity.

Advantages and shortfalls of delta block backup

• Delta backups take up a little space and are made richer
• Delta backups allow you to save a lot less overworld information- Methods of incremental and differential backup, through the need to copy files, for a minimal amount of change, can save a significant amount of superfluous information. The delta block copy method allows you to change the value.
• Scalable delta blocks are created by programs for specific algorithms, then you can only reinvent them with the programs themselves. For those sensi so, backups should be kept between those koristuvachivs, for whom you may need to vinicate manual inspiration danich.
• Delta Block Reservation More, it is necessary to download files from different elements.

The technology of binary patches was later developed as a way for software vendors to easily upgrade their programs from clients via the Internet. Such "patches" replaced the modified parts of the files. Some of the files themselves, not all files. Such patches take a lot smaller size what would simple patches take to replace the files again. Over the years, this technology has been adapted to the date of backup.

Note: The butt of setting up such a backup method is FastBittm, which great companies like Microsoft, IBM and Compaq.

The method of binary patches in backups is already similar to delta block backup, but with a difference, where delta blocks are split as one, and binary patches, as they are named, are beaten as one. In other words, delta copies to the backup archive whether there is a block of data that has been changed, let’s change the whole pair of characters (for example, if the block is 32 Kb, then when changing 1 character, the entire block of 32 Kb will be copied), and with the method of binary patches only bits are copied that data have changed. Tsya vіdminnіst allows you to save on the borders and as a trace on the traffic that is being transmitted.

Advantages and shortcomings of binary patches of backup copies

Note: In this hour, there are already few additions to the backup copy, which would have been supported tsyu technology. In addition, there is little information behind the technology, so it is not enough to look at the varto from the theoretical side.

• Practically I will use the supremacy of the data, after which there are the least backups.
• The minimum size allows you to reduce the cost to the smog of the passage of the merezhi.
• Tsey method more powerful up to system resources at the same time lower delta. However, such a difference can be compensated for by the hundredth decrease in profitability in the measure.
• There is practically no information about those how the file is backed up and the best method effective. Although, theoretically, the method is to blame, but not essentially collapsible, lower delta, nevertheless, practice in theory can be seriously challenged.

6. Mirrored backups

Most backup programs offer mirrored backup as an alternative to full backup, differential backup and others. Deyakі programs vikorivuyut alternative terminology for the understanding of the mirror, like, for example, "simple copying". It often looks like mirror copies are basically a simple type of backup. This method does not suffice if there is a special backup technology, only a simple copy operation. As an example, if you copy and paste a directory from one disk to another, you can check that you have created a mirror backup copy of this folder. Files in mirrored copies sound like the files themselves, which are in the dzhereli. The stench does not get stuck in the archive, like with a new backup copy (if some programs can compress other files and encrypt it).

When mirrored backup copies are victorious

Mirrored copies without embarrassment are good for vipads, if most of the copied files are already squeezed into the archives. For example, music files in mp3 or wma format, images in jpg format either png, video in DivX, mov or flv format. In addition, more installers are also squeezed. If you include these files in the original procedure for a full backup, as a stagnant squeezing, then remember that in addition, such a copy will be saved for a long time, the sub-bag archives will be little taken up by the remitter (although not enough data will be squeezed). It's best for this sense to create a backup schedule for both the files and the files that aren't. As your backup software supports filters, you can tweak them to automatically select appropriate files for your skin task.

Advantages and shortfalls of mirrored backups

• Mirrored copies can be visually copied on scribbled files.
• Through those that a mirror copy is not stored in a single archive file, you can less turbulent about file poshkodzhennya.
• Mirrored copies, as a rule, do not need to be embossed and this will be required there is a lot of space for saving, so as not to be stuck with other methods, like, for example, hard work (details about them will be given later)

7. Synthetic new backups

Synthetically, externally, backup is described sometimes in descriptions, but it should be understood that it is not a backup method, but a technology for organizing backup, as it can be set up to one of the designated methods to effectively create and backup.

Synthetic copies, as a rule, only exist in client-server backup systems. Sens method dosit simple. The client computer can make a backup copy for any other way (incremental, differential or otherwise) and transfer the backup copy to the server. The server, at the same time, independently combines a sprinkling of okremikh archives for the formation of synthetic new copies. This method of organization allows, after the creation of the first new backup copy, client computer do not re-create new backup copies, the shards of this process are automatically saved on the server.

The success of such an approach is gained by two important moments. First, the speed of the backup copy with different differential copies will not be reduced hourly through the collection of changes, the shards of synthetic new archives will be created on the server on a regular basis. In another way, updating files on the client machine does not depend on the process of reconstructing files in parts. The reason for this is those that the reconstruction is already being carried out on the server, allowing the client machine to download archives in the least possible hour.

8. Backup copy of the hard copy pages

Some backup programs support the creation of multiple files, thus allowing you to save disk space by creating a copy of the same mirrored backup copies of the same set of files.

In order to understand what is hard to understand, it is necessary to understand how files are stored on a hard disk. When the file is saved, physical data can be recorded in any place on the disk. In any case, the file system creates just a little bit of data on the physical file, which you vikoristovuvali. Some file systems allow you to create more than one hard copy of real data. Vicoristanya zhorstskih silan allow vykoristovuvat whether a number of files in different directories, yakі will rely on those same physical data.

When you change the backup program, if you want to make a quick request to create multiple copies of the same files, the program will create a quick request for all files, but it has not changed. For example, if you create two copies of a catalog, which will take 100 MB of data, then for the greatest minds, these copies will take 200 MB on a hard drive. For the help of those who send such copies, they will take up 100 MB of disk space for you. Changing any of the files in such directories will actually change only one physical data, with which data will be available in both directories. For example, if you create catalogs with hard messages, if you increase the file by 2 MB in the first catalog, then the larger size will be 102 MB, and if so, the data in both catalogs will be the same.

Note that if you want to see one of the backup copies, if you need to avenge hard efforts, then it won’t be a problem, the shards will not start with any other efforts. Physical data to the file on the disk is seen only once, if all the data sent to the new file is deleted. It is also necessary to understand that zhorstky efforts can only be created within the boundaries of one volume ( logical drive). For example, between different divisions or disks it is not possible to create hard messages. For Windows NTFS file systems, it is supported by a slightly different force, while FAT is not supported at that time.

Note: Windows explorer, insurance coverage, not insurance coverage of hard messages. This means that if the file takes up 100 MB and if it takes two more times, then it will actually take a total of 100 MB of disk space, while Windows Explorer will show you a 200 MB disk. This moment is necessary to protect when choosing a backup copy of a variety of hard messages.

Tim is not less, we’ll add it without giving you the whole method, it’s necessary to win with care. So, the logic of "change files in different directories means change of data in different directories" is obvious given method don't get stuck. Tse means that the change of one file in one of the copies means the change of the same file in all copies. Therefore, if you use the backup program, as if you are trying hard, it is recommended that you make all the changes only through the program, and it will be reduced as a manual change.

Final words about reservations

Regardless of the variety of methods, backup copying is one of the quiet areas, de the choice of victorious technologies is guilty of being truthful, at a glance. Do not varto vikoristovuvaty method and only through other characteristics, such as speed and disk space. So, for example, if you save a backup copy on a portable hard drive, using such technology, like delta block copying, it is possible to allow you to spare your space, or you can make such copies absolutely perfect in situations, if a backup program is not available you need to copy the document on another computer, or for some reason the program was broken, and there is no access to the Internet for downloading the installer). With such a time, there will be more correctness for such a great incremental copying (without delta), so that you can always manually restore the required documents. So, try to choose technologies zі healthy gluzdom.

Now, you know the terms of the backup copy, and also understand what the methods mean in theory and in practice.

Wealthy Vіdomi different systems creating disk images and backup data, for example Acronis True Image, Pagaron Drive Backup, Ghost, Time Machine for Mac-smart computers and others. Microsoft has also hijacked a data backup system from its operating system, as it is available for outstanding coristuvachiv, i for system administrators. Before the release of the operating system Windows Vista Microsoft propelled the backup system NTBackup and the System Restore utility to the shortlisted people, as they were silently short-lived. With the release of Windows Vista and the transition to the VHD image capture format, it became possible to simply backup data and create images of the operating system using a new set of utilities called Windows Backup and Restore. After the release of new operating systems, the entire component is upgraded and modified. In this article, we can see what Microsoft is promoting kіntsevogo koristuvach for backing up data from the Windows 8 operating system, which has recently been released. A little later, briefly about the main types of backup, which are implemented in the numerical products of various companies.

See the backup

Backup copy is shared on see different zaleno v_d zavdan, yakі put before realizing yoga software security. In some cases, it is not necessary for koristuvachs to create copies of important files that are saved on the disk, in others - to create full images of the operating system with the possibility of executing all forward changes. In this case, system administrators are hopeful of the possibility of centralized data backup, which will simplify control over versions of backup copies and update systems as needed. Naturally, fallow in the same type of backup, it is necessary to use the same algorithm for saving files - either byte by byte, or sector-by-sector copying from a data file, if the information is accurately recorded on a backup copy. To update files and data, the functions of file systems can also be reversed, which will support logging and protocol changes, - the latest files of the file system will be started, and the data will be backed up if necessary, just like the files are recognized. File systems with extended support for version control are best suited for this kind of situation, and it's easy to save space on backup media. Let's consider the traditional creation of backup copies of files, which are not victorious at the moment, and backup algorithms in real time. In this case, the backup copy should be navited, if the file is open to the program. Such a possibility is available to a variety of snapshots of file systems and is actively occupied, for example, in virtualization systems for robots with virtual disk storage devices. The process of reserving data can be done in a number of ways. Let's look at the widest of them.

Cloning divisions and creation of images

Cloning the transfer of a copy of the distribution or distribution of the disk with the required files and directories, as well as file systems to the backup nose, so that a new copy of the data is made to another nose. For the sake of a large amount of space on the backup drive, but at the same time it allows you to reach the most backup of your PC or disk with data. Also, especially next guess about the cloning of the system special image- a virtual accumulator, tobto the file, which can save a sprat of disk partitioning. Such an image can be created by the operating system. Vin allows you to speed up the data, and also hope to be able to work with him, like a great disk, or connect yoga to virtual machines How to easily transfer operating systems from one server or computer to another. Today virtual images Gain popularity for the flexibility of connection, as well as cross-platform and easy portability from one computer to another. As a rule, cloning or creating an image of a backup copy is rarely done, shards are obligatory, borrowing a backup copy, even great. Similar procedures are used mostly for creating a copy of the operating system with the usual files, and not for backing up the rest of the data on disk. To back up data, which are often changed or backed up in robots, another type of backup is commonly used - external file backup.

External file backup

This type of backup transfers the creation of duplicates of all files on the nose simple method- Copies from one month in another. Outside the file backup through the trivality process, it should be carried out during non-working hours, which is explained too much by the great obligations of the tribute. This type of reservation allows you to save important information, but through the great terms, the reservation of wines is not suitable for the renewal of a small date. On the other hand, file copying is recommended to be done at least once a day, but rather, it is better to do it with other types of file copying: differential and incremental.

Differential redundancy

Differential backup transfers fewer files that have been changed from the rest of the full backup. This allows you to change the data on the backup carrier and, if necessary, speed up the process of restoring the data. Scales of differential copying should be carried out more often, lower backup copies, it is even more effective, scales allow you to restore these data, if you know you have changed your calls recently, and check the history of changing files from a new copy.

Incremental backup

Incremental redundancy is added to the differential. It may be out of the way, that at the first start, only backup copies of these files are made, as if they were changed from quiet fir, as the rest of the time, the backup was taken outside, or the differential backup copy was made. The next incremental backup processes will add only those files, as they know the changes from the moment of the previous backup procedure. With any new or new files, they do not replace the old ones, but are added to the new ones independently. Obviously, in this case, the history of changing files is increased with the skin backup stage, and the renewal of data for this type of backup is more advanced, it is necessary to remember the entire history of changing files, bit by bit. However, with differential backup, the backup process is more simple: the main copy is redone and the rest of the differential backup data is added to it.

Bagato software packages for reserving vicorist, see different reservations, and most often go for them with a method of greater efficiency and economy. System Windows utilities, about yakі mi rozpovіmo in tsіy stattі, so zaluchayut raznі vіd vidi prіznіvannya, scho аlє more dynamіchіchіchі і more quickly іnіvlіvatі dіnі koristuvаchіv fallow іd situatsії. For server operating Windows systems available Great number utilities for updating, lower for desktop Windows operating systems, but here we will look at those that are available to the great core players. Moreover, for different editions of the Windows operating system, a set of components is reviewed, which is based on the operating systems on corporate and home. For Windows operating systems, there are two main data backup utilities, which differ in the type of backup.

Windows Backup And Restore

Windows Component Backup And Restore (Archіvatsіya аnd Vіdnovlennya) becoming available to koristuvachami z vhoda operating system Windows Vista and vіdpovіdaє for the creation of a full backup of the operating system with the possibility of incremental backup. With the release of the Windows 8 operating system, the entire component was renamed Windows 7 File Recovery. Wanting to do nothing with its functionality and without spending anything, Microsoft recommends that you download the new File History utility for backing up data, as it is included before the Windows 8 and Server 2012 operating systems, but a little more about it. Windows Backup And Restore allows you to create an automatic new backup change nose, optical discs or a special place on a distant server.

The rest of the functionality is only available for the first editions of Windows 7/8, which is positioned as a solution for IT administrators companies. The new backup of the system at the time of the different components is transferred as a saving of the files of the files, and the ability to create an image of the entire operating system and the backup of the computer's eight disks. For a koristuvach, it’s also the creation of an exclusive image of the system, which way you can not only get on the new laptop of your computer, but also virtual disk in virtualization systems. At the time of shutting down the core component, you can specify folders that need to be backed up, as well as specify those system disks that you need to save during a full backup. When backing up less files koristuwacha Windows Backup And Restore Incremental backup of data, which allows you to take more downloads of files at different times and hours. Sound outside the backup icon and transfer it as a backup of the files in the backup, and create a system image, and navigate to a copy of the data recovery point of the Windows System Recovery component. The process of updating the files in the files can be done directly from the operating system - to achieve a simple and clear mind of the big files. Restoring the system in case of a serious failure can be done with the help of the Windows Recovery utilities. For whom it is necessary either to create a new special disk of inspiration or to win current image operating system, which was installed on the PC earlier. Pіd hour zavantazhennya modeі Windows updates Recovery prompts you to choose the following backup modes: upgrade files, move to the original recovery point, upgrade the system backup image to the main system disk. Data for recognition in any occasion can be taken from the optical internal accumulator, as well as fencing danich. The edition of the operating system in different roles is not gray. Unfortunately, despite the fact that Windows Backup And Restore is a hard and hard component of the operating system, Microsoft said that, thanks to the studies carried out, this utility is corrupted in the shortest time by 5% of corrupted workers. For a simple and effective backup of data, Microsoft has developed a link to the system for the next generation of system backup - Windows File History.

Windows File History

Windows File History, a new component of Windows 8 and Server 2012 operating systems, replaces its predecessor - Windows Backup And Restore. If you click, replace only incremental file backups, at that time, as the system images are created, the incremental backup mode can be switched off help Windows 7 file recovery. The Windows File History component is often expanded as a practical solution for hard workers who need a transparent way of backing up their important data. When expanding the utility, special attention was given to the simplicity of initialization of the process and the possibility of success shvidkogo review all saving data. Reservation process for assistance new utilities it doesn’t matter for a coristuvach in automatic mode, but it doesn’t help in the presence of new additives. It is impossible not to modify the reservation on the edge of the building, which allows you to easily manually process the saved files, as if they were mobile connections chi weak channels zv'azku.

Part of the basic functionality of Windows Backup And Restore was taken as the basis for the Windows File History utility, in which it was converted into a visual warehouse, in support of the presentation of saving data from the Koristuvach. Looking back at earlier savings is now available file manager windows explorer See the History tab for more help. Tse allows you to know the necessary files and add them to the system. Irrespective of those that the backup process is based on incremental backup, while working with it, we don’t blame the thought that the same backup, the better history of creation, modification or removal of files in the backup, is available at any time. Such a step before backing up data, insanely, more often than not, the lack of confirmation of coristuvachiv, oscillating the process is good and the best at zastosuvanni, nizh robot z Windows Backup And Restore.

To back up data for the help of Windows File History, you can copy optical data, save data, or save data files. Obviously, saving data on optical noses is better than this tradition, but the real method of stowing incremental backups, even though data can change more often. The optimal choice for primary storage tanks is the reservation of an external or internal storage tank.

For simplicity, work in Windows 8 skins who connects old hoarder You can win as a backup for the help of Windows File History. So, in order to save connections, in the menu options that appear during autorun, there is now an open tab that allows you to select a connection drive as a backup drive in one click. If you want to remember that, if the disk is turned on for the year in the system, the backup of data will be renewed, as only a few will be restored back. A similar pidkhіd zastosovuєtsya at the time of the reservation of data on the merezhev skhovische. Inclusion in the form of local fencing operating system Automatically release a new reservation cycle from the layout. Prozora activation system for Windows File History functions is really a great plus for a shorty.

For promotional reservations for the help of the Windows File History utility, the skin year is checked, if necessary, the person can choose the time of the day between the skin reservations. Koristuvachevі є mozhlivіst vstanovit promizhki between reservations of 10 minutes up to 1 day. For Windows File History, you can install only one more space for backup, prote, in order to add a spate of accumulating storage to the backup space, the stench can be alternated in the fallow period depending on their availability. Tse zruchno at the time of zastosuvannya merezhego shovischa that okremy hoarding. In this order, the data will be saved in the kilka mіsts, fallow in the flow configuration. It is also impossible to assign a function to the choice of the amount of depth of saving copies. For example, after one or more months the system can automatically overwrite old data, replacing them with new ones. Tse allows you to reserve the space for that mist where you need to reserve data. In addition, koristuvach can win up to 25% of the accumulative space for reserving data.

The Windows File History utility for locking backs up the folders that are most actively copied, and itself - "Contacts", "Vibrane" and "Working Style". In addition, the reservation is automatically backed up to all folders of the "Libraries". Koristuvach can create your own data libraries, as well as symbolic messages on real computer folders. Therefore, as a matter of course, it is necessary to back up a specific folder on the PC, before Windows installation File History It is necessary to add this folder to the libraries. Before that, if some folders need to be turned off for backup, then the koristuvach can selectively turn off all the libraries of the koristuvach, or a set of folders that are often vikoristovuyuyutsya. With the improvement of active integration with the function of "gloomy" saving of Windows Skydrive data, this "gloomy" service can be aimed at the backup of important data of the koristuvach, which are saved in the "gloomy". In order for such a call to work, it is not necessary to install Skydrive anymore, - after that the wine will be automatically added to the library and will be backed up if necessary. Unfortunately, the function of backing up data on the “gloomy” is not yet available to the core users, but Microsoft is already planning to add the possibility of backing up data on the “gloomy” collection of data to future versions of its OS.

in such a manner, new system Reserving Windows File History is a miracle worker for more backups. Simple and sensible interface with the ability to add files and update files closer to the current short, lower previous version incremental backup for Windows Backup And Restore.