Mike Dresser wrote:
>
>
> Matthias Meyer wrote:
>> Dear all,
>>
>> How scalable is backuppc?
>> Where are the limits or what can produce performance bottlenecks?
>>
>> I've heard about hardlinks which can be a problem if theire are millions
>> of it. Is that true?
>>
> The file system can become... interesting to fix or backup when you get
> a few million hard links, especially if you're using XFS. There
> _appears_ to be some bugs in Debian etch's xfs tools, last time I had to
> run an xfs_repair -n on etch it took 6 days.. after upgrading to lenny
> it takes about 10 minutes or so. I'm guessing there were some major
> improvements in the xfs tools from etch to lenny with regards to memory
> usage.
>> Anyone would share his experience about CPU usage in relation to
>> bandwidth usage? Particularly by using rsync?
>>
> I see about 2-15m/s on our rsync backups CPU usage is pretty low, it's
> mostly disk i/o that holds it up. The newer faster machines back up
> faster, so there's a bottleneck on the clients as well.
>
>> I have a 2x1GHz Server with 2GB RAM and 4x500GB SATA Disks in Software
>> Raid5.
>>
> server here is a 2x1.8ghz opteron 265, 5GB ram, 8x1TB with 3ware raid5.
> Backup window is set from 18:00 to 23:00, it generally finishes all the
> backups within that 5 hours. Full's every 8 days, incr every day.
>
> * Pool is 1852.64GB comprising 8466234 files and 4369 directories
> (as of 3/12 02:26),
> * Pool hashing gives 9654 repeated files with longest chain 85,
> * Nightly cleanup removed 7189 files of size 35.62GB (around 3/12
> 02:26),
> * Pool file system was recently at 44% (3/12 12:05), today's max is
> 44% (3/12 00:00) and yesterday's max was 44%.
>
> There are 42 hosts that have been backed up, for a total of:
>
> * 789 full backups of total size 10819.30GB (prior to pooling and
> compression),
> * 284 incr backups of total size 913.00GB (prior to pooling and
> compression).
>
I backup 10 PCs (Linux & Windows) from LAN and 8 PCs (Windows) over Internet
Pool is 182.54GB comprising 1008528 files and 4369 directories (as of 3/13
02:29),
Pool hashing gives 28891 repeated files with longest chain 20,
Nightly cleanup removed 1472 files of size 4.77GB (around 3/13 02:29),
Pool file system was recently at 47% (3/13 19:20),
today's max is 47% (3/13 02:00) and yesterday's max was 48%.
There are 18 hosts that have been backed up, for a total of:
107 full backups of total size 929.57GB (prior to pooling and compression),
112 incr backups of total size 122.94GB (prior to pooling and compression).
Whats the meaning of 2-15m/s?
br
Matthias
--
Don't Panic
------------------------------------------------------------------------------
Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
easily build your RIAs with Flex Builder, the Eclipse(TM)based development
software that enables intelligent coding and step-through debugging.
Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
_______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki: http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/
|
