Re: [BackupPC-users] files already in pool are downloaded

[Rich R. <ri...@sh...>]

> The problem is that BackupPC and rsync use different checksum algorithms.
> This has been discussed many times. I believe there is a specialized client
> being developped (BackupPCd) which may allow such speedups, but, as Les
> says,
>   
>   
What would be the problem with a lookup table of rsync cheksums to pool 
filenames/pool hash code?

backuppc+rsync requests checksum for file from remote system
remote rsync transmits
backuyppc+rsync checks checksum+filesize in rsyncsum+filesize => poolsum 
table
if there is a match, copy or link file from pool to destination file
else download the file

I'm not sure what the risk of duplicate rsync hashes is, but what does 
backuppc do now with that possibility during rsync?  I suppose it is 
used more for determining if a file has changed more than if two files 
are the same?

Rich