Acronis International Gmbh

Acronis Inc.

Yuri Per

Serguei M Beloussov

Maxim V Lyadvinsky

Stanislav Protasov

Alexander G Tormasov

Juri V Tsibrovski

Dmitry Egorov

Mark Shmulevich

Maxim V Tsypliaev

Vasily Semyonov

Maxim V Goldobin

Alexey Borodin

Alain Marie Patrice Gentilhomme

Oleg P Volkov

Andrey Zaitsev

Dmitry Chepel

Vladimir Miroshkin

Alexei Sergeev

Alexey Morlang

Sergey Kandaurov

Alexey Tyuryumov

Alexey Kuznetsov

Systems and methods for data recovery, backup and catalog generation are described. In part, the disclosure relates to a computer-implemented method for generating a data catalog includes creating a current backup archive; obtaining access to a Master File Table (MFT), or other index table such as an Inode Table, of the current backup archive and a MFT, or other index table such as an Inode Table, of a previous backup archive; comparing each entry in the MFT, or Inode Table, of the current backup to each entry of the MFT, or Inode Table, of the previous backup to identify one or more differences in the current backup archive; and saving one or more of the differences into the data catalog of the current backup archive.

Systems and methods of cataloging using file system metadata

Aspects of the present disclosure describe methods and systems for optimized re-striping in an erasure encoded storage. In one exemplary aspect, a method may receive a request to re-stripe a plurality of data blocks arranged as a tile in the erasure encoded storage, wherein the request comprises a desired tile width. The method may identify (1) a number of data blocks in the tile and (2) a width of the tile. The method may determine a maximum number of data blocks that do not need to be rearranged when reconfiguring the tile to the desired tile width. Furthermore, the method may determine a tile reconfiguration with the desired tile width that does not rearrange the maximum number of the data blocks of the tile, and may re-stripe the tile in accordance with the tile reconfiguration.

Systems and methods for optimized re-striping in an erasure encoded storage

A method, computer program product, computing system, and system for recovery of virtual machine files are described. The method may include creating a backup archive file, the backup archive file including a backup of a first virtual disk corresponding to a virtual machine hosted by a virtualization host device. The method may further include storing the backup archive file including the backup. The method may also include creating a second virtual disk that emulates the first virtual disk using data from the backup archive file. The method may additionally include communicatively attaching the second virtual disk to the virtual machine hosted by the virtualization host device. Moreover, the method may include transferring data from the second virtual disk to the first virtual disk corresponding to the virtual machine hosted by the virtualization host device.

Recovery of virtual machine files using disk attachment

A method, computer program product, and computing system for recovery of virtual machines are described. A method may include creating, via a computing device, an image of at least a portion of a virtual machine disk. The method may further include comparing, via the computing device, the image of the portion of the virtual machine disk with the portion of the virtual machine disk that currently exists to determine changed sectors of the portion of the virtual machine disk. The method may additionally include restoring, via the computing device, the changed sectors of the portion of the virtual machine disk.

Systems and methods for the recovery of virtual machines

Systems and methods for migrating and/or replicating computer systems are disclosed. Computer systems may be migrated and/or replicated from physical systems or virtual systems to physical or virtual systems. Migrating/replicating computer systems comprises determining the structure of the source computer system, generating instructions for migrating/replicating the structure of the computer system, and packaging the instructions in an executable package. The instructions may be formatted as a template, such as an OVF template, and be packaged with an executable agent and task list. The executable agent may be received and executed by a destination computer system. Executing the executable package may cause the instructions to be executed, as well as the optional agent, there configuring the destination computer system, possibly copying data present on the source computer system, and possibly rebooting the destination computer system.

System and method for platform-independent migration and replication of computer systems

Various embodiments are directed to systems and methods for creating an archive of a set of logical storage units stored on at least one storage medium. A first plurality of LSU descriptors may be generated. Each LSU descriptor may describe a current version of one of the set of LSUs at about the time of the generating. A first archive may be read to produce a first archive plurality of LSU descriptors. Each of the first archive plurality of LSU descriptors may describe a version of one of the set of LSUs when the first archive was created. The first archive plurality of LSU descriptors may be compared with the first plurality of LSU descriptors to identify a first LSU from the set of LSUs that has an associated LSU descriptor that does not match a corresponding LSU descriptor from the first archive plurality of LSU descriptors.

Fast incremental backup method and system

A method, computer program product, computing system, and system for snapshotless backup are described. The method may include receiving, via a backup agent, an indication of a virtual machine to be backed up in a backup archive file. The backup agent may run outside of the virtual machine. The virtual machine may be hosted by a virtualization host device. The method may further include identifying, via the backup agent, a virtual disk associated with the virtual machine indicated to be backed up. The method may also include tracking, via a virtualization host agent running on the virtualization host device outside the virtual machine, changes to the virtual disk associated with the virtual machine on a sector level basis. The method may additionally include reading the virtual disk and transmitting sectors from the virtual disk to the backup archive file on a first pass.

Snapshotless backup

A system and method is disclosed for using performance-maintaining commands for generating backup data of an unsupported file system. An example method includes intercepting a plurality of data storage commands transmitted from the file system to a storage device, where the plurality of data storage commands indicating sectors of the memory of the computer that do not contain valid data. The method further includes analyzing the plurality of data storage commands to determine sectors of the memory that contains valid data, generating a data structure that indicates the sectors of the memory that contain valid data and the sector of the memory that do not contain valid data, and subsequently generating the backup data copy of the memory of the computer based on the data structure.

System and method of using performance-maintaining commands for generating a backup of unsupported file systems

A system and method is disclosed for reducing a physical size of a data file that includes a plurality of blocks in sequence with each block having a defined size with a starting position and an end position. According to one aspect, the method includes obtaining information relating to an occupied physical region of the data file, where the occupied physical region contains unused space and/or unused data, and determining positions of first and second boundaries of the occupied physical region of the data file relative to the plurality of blocks in the data file. Furthermore, the method includes equalizing the occupied physical region by adjusting the first and second boundaries of the occupied physical region of the data file and removing data between the start and end of the removal region to reduce the physical size of the data file.

System and method of removing unused regions of a data file

A method for creating an inconsistent backup and then a consistent backup is described. The method may include creating an inconsistent, full backup of a storage device. The method may further include creating a first snapshot of the storage device. The method may also include creating a consistent backup increment of the storage device based on the first snapshot. Additionally, the method may include adding the consistent backup increment to the inconsistent, full backup.

Consistent backup of blocks through block tracking

A method, computer program product, and computing system for hot recovery of virtual machines are described. The method may include initiating a recovery process to transfer data, from a backup archive of a virtual machine to be restored, to a virtual disk at the virtual machine host computer. The method may further include booting the virtual machine to be restored. The method may also include intercepting a read request from the virtual machine to the virtual disk at the virtual machine host computer. The method may additionally include determining if the read request from the virtual machine requested data from the virtual disk which has not yet been restored from the backup archive to the virtual disk by the recovery process. Moreover, the method may include, in response to determining that the requested data has not been restored from the backup archive to the virtual disk, returning the requested data.

Hot recovery of virtual machines

A method, system and computer program product for backup and restoration of data. Hash values for data blocks subject to backup are generated. After a number of hashes are accumulated, e.g., on a backup server, these hashes are sorted. Then, the hashes are compared against the hash values in the hash table corresponding to data blocks that have already been backed up. If a hash matches the hash from the hash table, a pointer to the block in the archive is written to the table of pointers to the redundant blocks. Then, this hash value is deleted from a set of the hash values. A check is made if a hash is the last in the group. If the hash is the last in the group, the remaining unique hash values are written into the hash table. Otherwise, the next hash is selected from the group. The redundant data blocks are discarded and only unique data is backed up.

System and method for fast backup and restoring using sorted hashes

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for efficient backup using hashes One of the methods includes forming an image of a storage device, wherein contents of blocks of the storage device are restorable from the contents of blocks of the image. The method includes generating a first plurality of hash values, each hash value generated from contents of a block of the image. The method includes selecting a block of the storage device. The method includes generating a hash value from the contents of the selected block. The method includes determining whether the hash value occurs in the plurality of hash values. The method also includes generating an entry in the image in response to the determination.

System and method for efficient backup using hashes

A method for data backup including (a) forming an image of the storage device; (b) for each block to be backed up to the image, generating a hash; (c) for each block stored in the image, storing a hash in a hash table; (c) for each additional block of the storage device to be backed up, generating a hash; (d) sorting all the generated hashes and deleting duplicate hashes; (e) comparing the hashes to identify candidate blocks that might have identical contents with contents of blocks stored in the image; (f) if the hashes are not coincident, then backing up, to the image, contents of unidentified blocks and blocks that do not have identical hashes, and (g) otherwise, storing links in the image instead of the contents of the blocks, (h) after checking all the hashes for those blocks that need to be backed up, writing only unique hashes to the hash table; (h) links for multiple blocks with identical contents point to a single block in the image, (i) the image contains a bitmap of the backup; (j) the bitmap contains indicators for the links that define if a block contains the content or if the block points to another block, (k) also indicators that reflect used and unused blocks such that an indicator whether contents are shared with another block vs. contents are unique to every other block in the image.

A system for consolidation of backups. Each backup includes data and a map with offsets or addresses that point to data of current and/or previous backups. Backup are selected for consolidation. The offsets in the maps of the selected backups are combined into a single set of offsets; consolidating the selected backups to a new backup that contains the latest data from the selected backups, determined based on the offsets in the single set. The offsets in the single set are updated to point to the data in the new backup. The updated offsets are stored in the new backup as part of a backup map of the new backup. The selected backups comprise one initial full backup and at least one backup. Offsets from the maps of first backup of the selected sequence of backups up to the last created backup are checked.

Growing community of inventors

Moscow, Russia

Yuri Per