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Date:      Mon, 13 Oct 2008 14:21:48 -0700
From:      Matt Simerson <matt@corp.spry.com>
To:        freebsd-fs@freebsd.org
Subject:   Re: ZFS on backup fileserver - RAM usage
Message-ID:  <16C9B293-7BBE-496D-BA0B-DC78299186ED@corp.spry.com>
In-Reply-To: <48F3B8D6.6060309@quip.cz>
References:  <48F334A0.3080005@quip.cz> <9AAEBB23-75E8-49B2-BA2F-0AF98F79280F@corp.spry.com> <48F3B8D6.6060309@quip.cz>

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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.

Matt



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