Hi all,
So here's my backup scenario. I have one host with about 1.5TB of files,
split into two major directories (and into many subdirectories thereafter).
There's about 370,000 files per "major" directory. I need to do
full/incremental backups of this host. Under normal conditions, I can get
about 1MB/sec from it, so for a 'full' backup, I have no problem running it
for 2-3 days at a time. The problem is that the backups usually time out
somewhere halfway. One of two things happen: either the server load hits
20-30+ on a 15min interval and we're forced to kill rsync (using v3.0.6 in
rsyncd mode with --enable-checksum-seed set to 32k), or it'll just get some
network error along the way.
Not to mention that if the backup runs for too long, the two start running
in parallel and that really hurts the server (I have the host
virtual-aliased to two hostnames, so that I can successfully back up both
directories separately - since rsyncd can't support two different
directories per 'share').
Can anybody suggest some intelligent solutions for doing this? How can I
speed up rsync / set it to use less CPU? I searched for some solutions, but
everyone talks about limiting rsync _transfer_ speed, which is hardly the
issue here - I'm backing up over a cable modem, heh.
Any help appreciated. Thanks!
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