[Gluster-users] Fwd: files not syncing up with glusterfs 3.1.2

Steve Wilson stevew at purdue.edu
Mon Feb 21 17:52:53 UTC 2011

On 02/21/2011 12:47 PM, Joe Landman wrote:
> On 02/21/2011 12:45 PM, Steve Wilson wrote:
>> On 02/21/2011 09:54 AM, paul simpson wrote:
>>> hi fabricio,
>>> many thanks for your input. indeed i am using xfs - but that seems 
>>> to be
>>> mentioned in the gluster docs without any mention of problems. we
>>> benchmarked xfs vs ext4 - and found that xfs to be much better at 
>>> dealing
>>> with the bulk of our data - hi-def frames ~3-10M each - and large
>>> geometry/particle/volume files. 10M-200M. so, i'm keen to hear from
>>> anyone
>>> abotu xfs's suitability for gluster storage...
>>> as for file size; my understanding is that a distributed file system
>>> performance only really kicks in when your dealing with large>1M files.
>>> however, is dealing with small files meant to be unreliable with
>>> locking/access errors?
>> We had trouble with reliability for small, actively-accessed files on a
>> distribute-replicate volume in both GlusterFS 3.11 and 3.12. It seems
>> that the replicated servers would eventually get out of sync with each
>> other on these kinds of files. For a while, we dropped replication and
>> only ran the volume as distributed. This has worked reliably for the
>> past week or so without any errors that we were seeing before: no such
>> file, invalid argument, etc.
> Steve:
>   As a sanity check, do test your date stamps across the servers.  We 
> found *significant* issues when they drifted.
Thanks, Joe.  Both servers use NTP against the same subnet router so 
it's unlikely that they had a time discrepancy.  I just checked the two 
servers and their times are consistent with each other at the moment.


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