[Box Backup] BadBackupStoreFile

[Chris Wilson]

Hi Ben,

On Fri, 31 Aug 2007, Ben Summers wrote:

>> > Another feature request: The backup server should (additionally) store
>> > checksums across large blocks of files, e.g. 1MB blocks. Then only these
>> > checksums need to be read from disk instead of the whole backup file.
>> 
>> I have a feeling that we already do, but I'm not 100% sure. Ben, do you
>> know?
>
> Checksums are per-block, encrypted. The block size depends on the size of the 
> file. You can do a compare using the checksums only using the -q option, and 
> only the checksums are read from disc and transferred over the network.

Do you know if we do that for diffing as well, or only for compare?

Cheers, Chris.
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