[Gluster-users] GlusterFS and Kafka

[Vijay Bellur]

On Tue, May 23, 2017 at 1:39 AM, Christopher Schmidt <fakod666 at gmail.com>
wrote:

> OK, seems that this works now.
>
> A couple of questions:
> - What do you think, are all these options necessary for Kafka?
>

I am not entirely certain what subset of options will make it work as I do
not understand the nature of failure with  Kafka and the default gluster
configuration. It certainly needs further analysis to identify the list of
options necessary. Would it be possible for you to enable one option after
the other and determine the configuration that ?



> - You wrote that there have to be kind of application profiles. So to
> find out, which set of options work is currently a matter of testing (and
> hope)? Or are there any experiences for MongoDB / ProstgreSQL / Zookeeper
> etc.?
>

Application profiles are work in progress. We have a few that are focused
on use cases like VM storage, block storage etc. at the moment.


> - I am using Heketi and Dynamik Storage Provisioning together with
> Kubernetes. Can I set this volume options somehow by default or by volume
> plugin?
>


Adding Raghavendra and Michael to help address this query.

-Vijay




>
> Thanks for you help... really appreciated.. Christopher
>
> Vijay Bellur <vbellur at redhat.com> schrieb am Mo., 22. Mai 2017 um
> 16:41 Uhr:
>
>> Looks like a problem with caching. Can you please try by disabling all
>> performance translators? The following configuration commands would disable
>> performance translators in the gluster client stack:
>>
>> gluster volume set <volname> performance.quick-read off
>> gluster volume set <volname> performance.io-cache off
>> gluster volume set <volname> performance.write-behind off
>> gluster volume set <volname> performance.stat-prefetch off
>> gluster volume set <volname> performance.read-ahead off
>> gluster volume set <volname> performance.readdir-ahead off
>> gluster volume set <volname> performance.open-behind off
>> gluster volume set <volname> performance.client-io-threads off
>>
>> Thanks,
>> Vijay
>>
>>
>>
>> On Mon, May 22, 2017 at 9:46 AM, Christopher Schmidt <fakod666 at gmail.com>
>> wrote:
>>
>>> Hi all,
>>>
>>> has anyone ever successfully deployed a Kafka (Cluster) on GlusterFS
>>> volumes?
>>>
>>> I my case it's a Kafka Kubernetes-StatefulSet and a Heketi GlusterFS.
>>> Needless to say that I am getting a lot of filesystem related exceptions
>>> like this one:
>>>
>>> Failed to read `log header` from file channel
>>> `sun.nio.ch.FileChannelImpl at 67afa54a`. Expected to read 12 bytes, but
>>> reached end of file after reading 0 bytes. Started read from position
>>> 123065680.
>>>
>>> I limited the amount of exceptions with the log.flush.interval.messages=1
>>> option, but not all...
>>>
>>> best Christopher
>>>
>>>
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users at gluster.org
>>> http://lists.gluster.org/mailman/listinfo/gluster-users
>>>
>>
>>
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