From: Baruch Even (baruch_at_nonexisting.hamakor.org.il)
Date: Thu 19 Aug 2004 - 18:07:49 IDT
On Thu, 2004-08-19 at 15:16, Ira Abramov wrote:
> Quoting Baruch Even, from the post of Thu, 19 Aug:
> >
> > You should check if your gzip runs with --rsyncable option, otherwise
> > you don't save as much bandwidth as you want. The --rsyncable option
>
> oh, I didn't know I had to switch that on, I thought it was on by
> default... this option is not listed in the gzip manpage, neither on my
> woody not my sid! odd...
>
> no wait... gzip -h tells me about it on sid but not on woody (which my
> server is running). weirder and weirder... does this mean rsyncs will be
> heavier till I backport it from sid or upgrade to sarge? or should I opt
> for bzip2 instead? I read once it's more compatible with rsync's diffs.
It is likely that gzip in woody doesn't have this option and the one in
sid does.
I actually think that bzip2 won't be a better option, but rsyncing the
uncompressed files will probably be better.
Alternatively you could find or roll out a system that will generate a
directory with the original file once a month and the daily diffs
afterwards, this way you'll have a recoverable way to return to the
database x days backwards too. This will let you transfer only the daily
diffs since the former diffs and the base file will be unchanged.
Baruch
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