On 4/22/2010 1:55 PM, Gerald Brandt wrote:
>
> ----- "Les Mikesell" <lesmikesell AT gmail DOT com> wrote:
>  > That's partly from being implemented in perl and partly from counting
>  > iowait as CPU. Do you have the --checksum-seed=32761 option enabled for
>  > rsync?
>  >
>
> Not to hijack the thread, but I know what checksum-seed does, but how
> does it help?

If it is enabled, the backuppc server side will cache the block 
checksums and not have to repeat the read/uncompress/compute activity 
for every run.  See the section on "Rsync checksum caching" in 
http://backuppc.sourceforge.net/faq/BackupPC.html.  Note that (a) it 
doesn't help until the 3rd full backup and (b) a small configurable 
percentage is still computed to detect archive corruption.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com

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