Gluster users - Sep 2015 - Tuning for small files

> Where you run into problems with smallfiles on gluster is latency of
sending
> data over the wire.  For every smallfile create there are a bunch of
different
> file opetations we have to do on every file.  For example we will have
to do
> at least 1 lookup per brick to make sure that the file doesn't exist
anywhere
> before we create it.  We actually got it down to 1 per brick with lookup
> optimize on, its 2 IIRC(maybe more?) with it disabled.
Is this lookup optimize something that needs to be enabled manually with
3.7, and if so, how?

Thanks

----- Original Message -----
> From: "Iain Milne" <glusterfs at noognet.org>
> To: gluster-users at gluster.org
> Sent: Wednesday, September 30, 2015 2:48:57 AM
> Subject: Re: [Gluster-users] Tuning for small files
> 
> > Where you run into problems with smallfiles on gluster is latency of
> sending
> > data over the wire.  For every smallfile create there are a bunch of
> different
> > file opetations we have to do on every file.  For example we will have
> to do
> > at least 1 lookup per brick to make sure that the file doesn't
exist
> anywhere
> > before we create it.  We actually got it down to 1 per brick with
lookup
> > optimize on, its 2 IIRC(maybe more?) with it disabled.
> 
> Is this lookup optimize something that needs to be enabled manually with
> 3.7, and if so, how?
Here are all 3 of the settings I was talking about:

    gluster v set testvol client.event-threads 4
    gluster v set testvol server.event-threads 4
    gluster v set testvol performance.lookup-optimize on

Yes, lookup optimize needs to be enabled.

-b
> Thanks
> 
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
>

Are these options enabled by default, at least for new volumes in 3.7?
If not, why?

Regards
Andr?

Am 30.09.2015 um 16:22 schrieb Ben Turner:
> ----- Original Message -----
>> From: "Iain Milne" <glusterfs at noognet.org>
>> To: gluster-users at gluster.org
>> Sent: Wednesday, September 30, 2015 2:48:57 AM
>> Subject: Re: [Gluster-users] Tuning for small files
>>
>>> Where you run into problems with smallfiles on gluster is latency
of
>> sending
>>> data over the wire.  For every smallfile create there are a bunch
of
>> different
>>> file opetations we have to do on every file.  For example we will
have
>> to do
>>> at least 1 lookup per brick to make sure that the file doesn't
exist
>> anywhere
>>> before we create it.  We actually got it down to 1 per brick with
lookup
>>> optimize on, its 2 IIRC(maybe more?) with it disabled.
>>
>> Is this lookup optimize something that needs to be enabled manually
with
>> 3.7, and if so, how?
> 
> Here are all 3 of the settings I was talking about:
> 
>     gluster v set testvol client.event-threads 4
>     gluster v set testvol server.event-threads 4
>     gluster v set testvol performance.lookup-optimize on
> 
> Yes, lookup optimize needs to be enabled.
> 
> -b
> 
>> Thanks
>>
>> _______________________________________________
>> Gluster-users mailing list
>> Gluster-users at gluster.org
>> http://www.gluster.org/mailman/listinfo/gluster-users
>>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
> 

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