Method of redirecting iscsi mounted volume to read and write data and its backup recovery system

Abstract

The invention relates to a method for redirecting iSCSI mounted volume to read and write data and a backup recovery system thereof, wherein the method includes 1) creating a temporary sparse file with the same size as the original sparse file; During the write operation, directly write the data to the temporary sparse file described in step 1); 3) when the read operation to the original sparse file is captured, read the data from the original sparse file and merge the data from the temporary sparse file The changed data is read out to obtain the latest data block; the backup recovery system includes a storage module of the native file system and a SCSI protocol analysis module. Compared with the prior art, the invention improves the reading and writing performance of the mounted volume, thereby better meeting the storage performance required by the application on the production system and improving the availability of the iSCSI mounted volume.

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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