[Gluster-devel] Glusterfs and Structured data

[Pranith Kumar Karampuri]

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.


> [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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>



-- 
Pranith
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