ZFS on backup fileserver - RAM usage

Matt Simerson matt at corp.spry.com
Mon Oct 13 21:21:54 UTC 2008

On Oct 13, 2008, at 2:08 PM, Miroslav Lachman wrote:

> Matt Simerson wrote:
>> It all depends on your workload. If you work your backup serves  
>> hard  (as I do, backing up thousands of OS instances), you'll have   
>> significant reliability problems using FreeBSD 7.1 and ZFS. After  
>> a  crash that corrupted my file systems, I have moved to 8-head  
>> with  Pawel's latest patch.
>> My backup servers have between 16 and 24 disks each. The ones with   
>> 16GB of RAM crash far less frequently than my server that has only   
>> 2GB. That one is getting upgraded soon.
>> Matt
> I am planning to backup about 10-15 servers (mainly webservers and  
> few mailservers) and not expecting high load.
> Did 8-current with the latest ZFS patch fixed all stability problems?
> Thanks for suggestions to both of you.
> Miroslav Lachman

No, there are still stability issues under heavy load. The are just  
far less frequent under 8-current than under 7.  I couldn't keep my  
systems up for more than 2 days before switching to 8.  Running 8-head  
was better, but so far the best available configuration is 8-head with  
"the patch" applied.


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