Cassiano Surek <[email protected]> wrote on 11/06/2012 05:03:44 AM:
> Of course, how could I have missed that! I did find it now, thanks
Michał.
>
> Last full backup (of 100 odd Gb) took slightly north of 10 days to
> complete. Incremental, just over 5 days.
I did not see if you mentioned how *many* files you had. Are we talking
100,000 files or 10 Million files? That will make a *big* difference in
performance.
For some more numbers: I have a file server with 700GB of data in 400,000
files that takes about 5 hours for an incremental, and about 13 hours for
a full. I have another server that is 3,000GB (3TB) big with 1.4 Million
files and it takes about 50 hours for a full and about 20 hours for an
incremental. Both are *substantially* faster than yours.
Both servers use an Intel Atom D520 processor (read: very low
performance) with 4GB of RAM. One has a 4-disk RAID5 array and one has a
6-disk RAID6 array of standard desktop SATA drives.
I'm not happy with the performance I get from these systems (though they
are acceptable), but they are several orders of magnitude faster than
yours.
I will echo some of the previous suggestions:
1) Do a test rsync between the two systems to see if you get sufficient
performance that way
2) If you're using rsync over ssh, is CPU (for encryption) a problem? (I
use rsyncd, so no encryption)
3) If you're using compression, is CPU a problem? (I had to turn off
compression for the sake of performance)
4) Do you have a *zillion* little files? Then RAM or disk seeks may be
your problem.
Given the *terrible* numbers you're seeing, I would really emphasize
making sure that there isn't something wrong with your hardware (such as
network or disk). Also, make sure you really look at top/vmstat/dstat
numbers to see what you're system is doing. This is not just a little bit
of slowdown. Something is fundamentally broken.
Hope that helps...
Tim Massey
Out of the Box Solutions, Inc.
Creative IT Solutions Made Simple!
http://www.OutOfTheBoxSolutions.com
[email protected]
22108 Harper Ave.
St. Clair Shores, MI 48080
Office: (800)750-4OBS (4627)
Cell: (586)945-8796
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