Re: Release 3.10 feature proposal : Estimate time to complete rebalance

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Thanks Nithya for proposing this feature request for 3.10, this is the first one to hit the lists :)

I have a few questions/comments,

1) I marked this as a backlog for distribute, which it is (as I am a co-maintainer for distribute, else would have deferred this to the appropriate maintainer(s) (a note for future requests))

2) I marked this against the must fixes focus area, partly because it does not fit anywhere else (and is possibly user experience related), and partly because this has been in the pipeline for a long time. (again took the action being ne of the co-maintainers for distribute)

3) Assigned this to you, so that in the future for 3.10 release status I can ping you for updates on its progress (let me know if someone else intends to develop the feature).

4) We still need a spec for the same (even one that is basic), here [1], post which I can mark this for the 3.10 release milestone in github

Thanks,
Shyam

[1] Gluster specs: https://github.com/gluster/glusterfs-specs

On 12/07/2016 12:13 AM, Nithya Balachandran wrote:
There is no way at present to determine when a rebalance operation will
complete. This requires admins to keep monitoring the rebalance operation.

The proposed approach will calculate the estimated time every time the
rebalance status command is issues. The value will be displayed along
with the rebalance status output.

 1. Determine the number of files on a brick using statfs
 2. Calculate the rate at which files have been processed so far
 3. Calculate the time required to complete the operation based on 1 and 2.

This approach will provide a rough estimate of the time required and
will be updated every time the status command is issues.


This has been requested by users several times in the past.

Issue opened at [1].


Regards,

Nithya


[1] https://github.com/gluster/glusterfs/issues/58




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