Gluster users - Apr 2017 - rebalance fix layout necessary

Hi,

I have a query on rebalancing.

let's consider following is my folder hierarchy.

parent1-fol (parent folder)
              |_
                 class-fol-1 ( 1 st level subfolder)
                               |_
                                  A ( 2 nd level subfolder)
                                   |_
                                      childfol-1 (child folder created
every time before writing files)


Now, I have a running cluster with 3.10.1 with disperse volume and I am
planning to expand cluster by adding bricks.

will there be a problem using newly added bricks without doing a "rebalance
fix layout" other than existing files cannot be rebalanced to new brick and
files created under existing folder will not go to new brick?.

I tested above case in my test setup and observed files created under new
folder goes to new brick. and I don't see any issue on listing files and
folder.

so, My case is we create child folder every time before creating files.

The reason to avoid rebalance is I have more than 10000 folders across 1080
bricks. so triggering rebalance will take a long time and in my
previous expansion in 3.7 was not able to access some folders randomly
until fix layout completes.


regards
Amudhan
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On 4 April 2017 at 12:33, Amudhan P <amudhan83 at gmail.com> wrote:
> Hi,
>
> I have a query on rebalancing.
>
> let's consider following is my folder hierarchy.
>
> parent1-fol (parent folder)
>               |_
>                  class-fol-1 ( 1 st level subfolder)
>                                |_
>                                   A ( 2 nd level subfolder)
>                                    |_
>                                       childfol-1 (child folder created
> every time before writing files)
>
>
> Now, I have a running cluster with 3.10.1 with disperse volume and I am
> planning to expand cluster by adding bricks.
>
> will there be a problem using newly added bricks without doing a
> "rebalance fix layout" other than existing files cannot be
rebalanced to
> new brick and files created under existing folder will not go to new
brick?.
>
> I tested above case in my test setup and observed files created under new
> folder goes to new brick. and I don't see any issue on listing files
and
> folder.
>
> so, My case is we create child folder every time before creating files.
>
> The reason to avoid rebalance is I have more than 10000 folders across
> 1080 bricks. so triggering rebalance will take a long time and in my
> previous expansion in 3.7 was not able to access some folders randomly
> until fix layout completes.
>
>
It sounds like you will not need to run a rebalance or fix-layout for this.
It should work fine.

Regards,
Nithya
>
> regards
> Amudhan
>
>
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://lists.gluster.org/mailman/listinfo/gluster-users
>
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