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2012 Aug 10
1
want to write a difference copy program to sync two VHDs in blktap
Hello List,
I''m using blktap on XCP 1.1 and developing a difference copy program for
easy backup and remote archival.
The idea is to read the BAT of VHD1 and sync it to BAT of VHD2 with BITMAP
and the data blocks.
Other way would be by adding a sha1 signature in each data block and
comparing it with remote VHD.
I tried to get some info from below programs but could not get required
info about adding a sha1 sign of data block while writing it.
Similar to ZFS this can be used...