[Gluster-devel] Glusterfs and Structured data

[Amar Tumballi]

On Tue, Feb 6, 2018 at 3:15 PM, Pranith Kumar Karampuri <pkarampu at redhat.com
> wrote:

>
>
> On Sun, Feb 4, 2018 at 5:09 PM, Raghavendra Gowdappa <rgowdapp at redhat.com>
> wrote:
>
>> All,
>>
>> One of our users pointed out to the documentation that glusterfs is not
>> good for storing "Structured data" [1], while discussing an issue [2]. Does
>> any of you have more context on the feasibility of storing "structured
>> data" on Glusterfs? Is one of the reasons for such a suggestion "staleness
>> of metadata" as encountered in bugs like [3]?\
>>
>
> I think the default configuration of glusterfs leads to unwanted behaviour
> with structured data workloads. Based on my experience with customers I
> handled, structured data usecase needs stronger read after write
> consistency guarantees from multiple clients which I don't think we got a
> chance to qualify. People who get it working generally disable perf
> xlators. Then there are some issues that happen because of distributed
> nature of glusterfs (For example: ctime).  So technically we can get
> glusterfs to work for structured data workloads. We will need to find and
> fix issues by trying out that workload. Performance qualification on that
> will also be useful to analyse.
>
>
A note on this for people who are not aware about 'gluster-block' project:

https://github.com/gluster/gluster-block could be used to handle some such
workloads. If anyone gets into issues on top of Gluster Filesystem mount,
then feel free to try gluster-block out, and give us feedback to help
improving it.

-Amar


>> [1] http://docs.gluster.org/en/latest/Install-Guide/Overview/
>> [2] https://bugzilla.redhat.com/show_bug.cgi?id=1512691
>> [3] https://bugzilla.redhat.com/show_bug.cgi?id=1390050
>>
>> regards,
>> Raghavendra
>> _______________________________________________
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>> Gluster-devel at gluster.org
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>>
>
>
>
> --
> Pranith
>
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>



-- 
Amar Tumballi (amarts)
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