[Gluster-users] Need help on performance issue

[MySystem 365]

Thanks Eliezer,

The size is about 600G. Do you think mounting with NFS on top of GlusterFS
instead of native gluster client will help?

-
Jack Marc


On Mon, Jun 30, 2014 at 2:53 PM, Eliezer Croitoru <eliezer at ngtech.co.il>
wrote:

> Hey Jack,
>
> I asked since I have been trying to use GlusterFS based storage for my
> local very-tiny mailserver and it was kind of a disaster.
> There was only one mailserver mounting the volume and many times it took
> about ages to sync a directory.
> Sometimes I had an issue which caused all sort of index errors in the
> dovecot log.
>
> Eventually what I did was to mount the FS image file ontop of a glusterfs
> the same as many do for VMs.
>
> The FS is fast and redundant but lacks that ability to be flexible for
> growth in couple aspects.
>
> My glusterfs nodes are very small with 4gb ram, quad-core coreI5, 2TB disk
> at each machine for replication.
> It's a very tiny machine and I am considering replacing it with a tiny
> Lenovo IOMEGA NAS due to abusive power consumption.
>
> Using maildir that stores lots of tiny files might be the main issue of
> the high I/O and related issue(while was not researched enough).
>
> About the high I/O on one node and not the other..
> It is possible that most of the load is distributed on one node more then
> the other kind of randomly.
>
> What is the size of the mail server?(in terms of GB and INODES, df -i &&
> du -h)
>
> Eliezer
>
>
> On 06/30/2014 09:41 AM, MySystem 365 wrote:
>
>> It is Qmailtoaster using vpopmail -Maildir structure.
>> We also notice that sometimes g1 is at high I/O and then g2 is low or it
>> takes turn.
>>
>> Regards
>> Jack Marc
>>
>
>
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