최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0118182 (2011-05-27) |
등록번호 | US-8572038 (2013-10-29) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 26 인용 특허 : 387 |
Preparing source data to be replicated in a continuous data replication environment. Certain systems and methods populate a file name database with entries having a unique file identifier descriptor (FID), short name and a FID of the parent directory of each directory or file on a source storage dev
Preparing source data to be replicated in a continuous data replication environment. Certain systems and methods populate a file name database with entries having a unique file identifier descriptor (FID), short name and a FID of the parent directory of each directory or file on a source storage device. Such information is advantageously gathered during scanning of a live file system without requiring a snapshot of the source storage device. The database can be further used to generate absolute file names associated with data operations to be replayed on a destination storage device. Based on the obtained FIDs, certain embodiments can further combine write operations to be replayed on the destination storage device and/or avoid replicating temporary files to the destination system.
1. A method for performing data replication, the method comprising: monitoring with one or more processors of a source storage system a plurality of journal entries associated with writing data to a source storage device associated with the source storage system;identifying a first journal entry of
1. A method for performing data replication, the method comprising: monitoring with one or more processors of a source storage system a plurality of journal entries associated with writing data to a source storage device associated with the source storage system;identifying a first journal entry of the plurality of journal entries, the first journal entry comprising a first data write operation, a first file identifier descriptor (FID) of a file to be modified by the first data write operation on the source storage device, and a first location of a first portion of the file to be modified,wherein a FID identifies a file or directory of a file system on the source storage system and is usable to construct an absolute file name for transmitting data to a replication system;identifying a second journal entry of the plurality of journal entries, the second journal entry comprising a second data write operation, a second FID of a file to be modified by the second data write operation on the source storage device, and a second location of a second portion of the file to be modified,wherein the first journal entry and the second journal entry are from the same journal;determining with the one or more processors that the first and second data write operations can be combined into a single write operation based on a determination that the first and second FIDs both correspond to a first value;combining the first and second data write operations based on said determination;constructing with the one or more processors an absolute file name by associating the first value with a short name and at least one directory name, wherein neither the first nor second journal entries comprises the absolute file name; andtransmitting the single write operation and the absolute file name to a destination storage device to replay on the destination storage device the data modifications associated with the first and second write operations,wherein the destination storage device stores a replicated version of data written to the source storage device. 2. The method of claim 1, wherein the first location comprises a first byte range and the second location comprises a second byte range. 3. The method of claim 2, wherein said determining that the first and second data write operations can be combined further comprises analyzing a distance between the first and second byte ranges. 4. The method of claim 3, wherein determining that the first and second data write operations can be combined further comprises determining that the distance is less than a threshold amount. 5. The method of claim 4, wherein the threshold amount is less than 1 KB. 6. The method of claim 5, wherein the threshold amount is approximately 200 bytes. 7. The method of claim 1, wherein said monitoring operations comprises processing the plurality of journal entries with a filter driver. 8. The method of claim 1, wherein said monitoring comprises analyzing a portion of the plurality of journal entries as received over a predetermined period of time. 9. The method of claim 8, additionally comprising adjusting the predetermined period of time based on a known good state of the source storage device data. 10. The method of claim 8, wherein said predetermined period of time is approximately four seconds. 11. The method of claim 1, additionally comprising: identifying multiple ones of the plurality of journal entries having other write operations that cannot be combined;reading byte ranges associated with the other write operations in order of increasing file offsets; andtransmitting the other write operations to the destination storage device for replay on the destination storage device in the order of the increasing file offsets. 12. A system for performing data replication, the system comprising: at least one computer application executing on a computing device and configured to generate operations associated with data on a source storage device associated with a source storage system;a filter module disposed between the at least one computer application and the source storage device, the filter module configured to: monitor a plurality of journal entries associated with writing data to the source storage device;identify a first journal entry of the plurality of journal entries, the first journal entry comprising a first data modification operation, a first file identifier descriptor (FID) of a file to be modified by the first data modification operation, and a first location of a first portion of the file to be modified,wherein a FID identifies a file or directory of a file system on the source storage system and is usable to construct an absolute file name for transmitting data to a replication system;identify a second journal entry of the plurality of journal entries, the second journal entry comprising a second data modification operation, a second FID of a file to be modified by the second data modification operation, and a second location of a second portion of the file to be modified,wherein the first journal entry and the second journal entry are from the same journal;a processing module configured to: determine that the first and second data modification operations can be combined into a single modification operation based on a determination that the first and second FIDs both correspond to a first value; andcombine the first and second data modification operations based on said determination; andat least one database thread configured to construct an absolute file name for replaying the single modification operation on replication data of a destination storage device by associating the first value with a short name and at least one directory name, wherein neither the first nor second journal entries comprises the absolute file name,wherein the destination storage device stores a replicated version of data written to the source storage device. 13. The system of claim 12, wherein the filter module comprises a file system filter driver. 14. The system of claim 13, wherein the first data modification operation comprises a write operation, and wherein the file system filter driver is configured to obtain the first data modification operation and the first FID without receiving a copy of data to be written to the source storage device. 15. The system of claim 12, further comprising a database comprising file name data that associates each of the first and second FIDs with a short name and a parent FID. 16. The system of claim 12, wherein the first file location comprises an offset and a length of a byte range of the file to be modified. 17. The system of claim 12, further comprising a memory configured to store a portion of the operations generated over a predetermined period of time. 18. The system of claim 17, wherein the predetermined period of time is at least three seconds. 19. A system for performing data replication, the system comprising: means for monitoring a plurality of journal entries associated with writing data to a source storage device associated with a source storage system;means for identifying a first journal entry of the plurality of journal entries, the first journal entry comprising a first data write operation, a first file identifier descriptor (FID) of a file to be modified on the source storage device, and a first location of a first portion of the file to be modified, and for identifying a second journal entry of the plurality of journal entries, the second journal entry comprising a second data write operation, a second FID of a file to be modified on the source storage device, and a second location of a second portion of the file to be modified,wherein a FID identifies a file or directory of a file system on the source storage system and is usable to construct an absolute file name for transmitting data to a replication system, andwherein the first journal entry and the second journal entry are from the same journal;means for determining that the first and second data write operations can be combined into a single write operation based on a determination that the first and second FIDs both correspond to a first value, and for combining the first and second data write operations based on said determination;means for constructing an absolute file name by associating the first value with a short name and at least one directory name, wherein neither the first nor second journal entries comprises the absolute file name; andmeans for transmitting the single write operation and the absolute file name to a destination storage device to replay on the destination storage device the data modifications associated with the first and second write operations,wherein the destination storage device stores a replicated version of data written to the source storage device. 20. The system of claim 19, further comprising means for storing file name data that associates each of the first and second FIDs with a short name and a parent FID usable to construct the absolute file name.
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