just some verification here.

if you have rsync 3 on both client and server, backuppc(via CPAN file-rsync) will infact get to take advantage some of the rsync 3 benefits.

anything that does not require a flag on the rsync command is there (file-rsync does not pass any rsyncv3 flags).

As far as backuppc is concerned, this give one big benefit.  rsync will limit the number of files it holds in memory to the current sync directory and the next one, instead of all files.  this is huge for memory savings.  there was also some tuning to the checksum algorythym so it is a bit faster.

I used to spend 15 minutes of a large sync on just building the filelist and it would each up ~500MB, now that list takes half as long and is only using ~20MB.

good luck.

thanks

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