Method for redirecting read-write data of iSCSI mounting volume and backup and recovery system thereof

Abstract

The invention relates to a method for redirecting read-write data of an iSCSI (Internet Small Computer System Interface) mounting volume and a backup and recovery system thereof. The method comprises the following steps: (1) creating a temporary sparse file with the same size as an original sparse file; (2) when write operation of the original sparse file is captured, directly writing the data into the temporary sparse file in the step (1); (3) when read operation of the original sparse file is captured, reading the data from the original sparse file and merging data changed read from the temporary sparse file to obtain a newest data block. The backup and recovery system comprises a storage module and an SCSI protocol analysis module of a native file system. Compared with the prior art, the read-write performance of the mounting volume is improved, so that the storage performance required by application on a production system can be met well, and the availability of the iSCSI mounting volume is improved.

Description

technical field [0001] The invention relates to an iSCSI (Internet Small Computer System Interface) volume mount recovery technology in the field of disaster recovery, in particular to a method for redirecting iSCSI mount volume to read and write data and a backup recovery system thereof. Background technique [0002] With the rapid changes in computer technology, today's computers have penetrated into all aspects of our lives, and the large amount of data generated by them has become one of our most precious wealth. How to protect and make good use of these data has become the focus of everyone's attention. [0003] Many application fields have strict requirements on data availability and timeliness. If there is no good solution to protect these data, once a disaster occurs, the blow to them will be fatal. I believe everyone knows that after the September 11 terrorist attack, many companies declared bankruptcy. [0004] Now that we have entered the era of big data, the amo...

AI Technical Summary

Problems solved by technology

However, the previous methods for redirecting write operations to mounted volumes were not very good. For example, installing a driver on the production system and redirecting write operations to mounted volumes is very complicated and consumes a lot of resources on the production system. ; Another example is redirection on the backup server, but the position of the changed data block needs to be found by maintaining the bitmap, and the block size of the iSCSI protocol is the sector size by default, so the bitmap here is larger than the bitmap of the file system Many, the backup service consumes a lot of memory. If the bitmap is not stored in the memory, the read and write performance of the iSCSI mounted volume will be very poor.

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