[Gluster-devel] New commands for supporting add/remove brick and rebalance on tiered volume

[Atin Mukherjee]

On Mon, Oct 3, 2016 at 12:21 PM, Hari Gowtham <hgowtham at redhat.com> wrote:

> Hi,
>
> The current add and remove brick commands aren't sufficient to support
> add/remove brick on tiered volumes.So the commands need minor changes
> like mentioning which tier we are doing the operation on. So in order
> to specify the tier on which we are performing the changes, I thought
> of using the following commands for add and remove brick
>
> adding brick on tiered volume:
> gluster volume tier <volname> add-hot-brick/add-cold-brick <brick> ...
> <force>
>
> removing brick on tierd volume:
> gluster volume tier <volname> remove-hot-brick/remove-cold-brick <brick>
> ... <start|stop|status|commit|force>
>
> I have framed it this way because once we mention details about tiering
> these commands become specific to tier and the syntax that we follow for
> commands are gluster volume component <VOLNAME> ...
> So i have made sure that the keyword tier comes after volume.
> Need suggestions to make these commands better.
>
> Similarly once we support add/remove brick we will be having rebalance
> commands and the idea is to support rebalance separately for each tier.
> So once we will have to rebalance status to display for which we need
> rebalance commands specific to tier. so these are the commands we have
> thought of:
> gluster v tier <VOLNAME> hot-rebalance/cold-rebalance <start|stop|status>
>
> Need your comments regarding this.
>

Overall it makes sense. Just a comment here. Instead of mentioning
remove/add/rebalance-hot/cold-brick can we have an additional arg called
tier-type <hot/cold> and continue with the existing semantics like
remove-brick, add-brick and rebalance?


> --
> Regards,
> Hari.
>
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>



-- 

--Atin
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