[Gluster-users] If using ZFS with GlusterFS, why disable the ZIL?

[Nathan Fiedler]

Hi Joe

That makes sense, thanks for the explanation. I'm encouraged now to use ZFS
with Gluster.

Thanks

n


On Thu, Oct 9, 2014 at 8:34 AM, Joe Julian <joe at julianfamily.org> wrote:

> On 10/9/2014 6:23 AM, Nathan Fiedler wrote:
>
>> In the Gluster community documentation, the ZFS Use Case [1] recommends
>> disabling the ZIL (intent log). Any thoughts on why that would be the case?
>> Much of the advice on tuning ZFS recommends against disabling the ZIL, so
>> I'm curious if there is a good reason why it should be done with Gluster.
>> The use case document certainly does not provide one.
>>
>> [1] http://gluster.org/documentation/use_cases/GlusterOnZFS/
>>
>
> I've not done that myself but from how I read that document, the user did
> that because he instead configured an ARC cache to use up to 75% of the
> machine's 24Gb of RAM. This prevents the double-write of using an on disk
> journal at the cost of losing data in the event of power loss.
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