[Gluster-devel] Questions on dht rebalance

[Muralidhar Balcha]

Hi Anand,
 I am enclosing the log. I added few log messages in dht_migrate_file. As
you can see the daemon terminates before files are migrated.

This is a small volume. When I added sleep(100) statement in
gf_defrag_done() routine then the migration of files work.

All my bricks are on a single node. I created a volume with two bricks,
created few files and added a new brick. I started the rebalance task.

Thanks,
Murali Balcha


On Sun, Nov 24, 2013 at 11:53 PM, Anand Avati <avati at gluster.org> wrote:

>
>
>
> On Sun, Nov 24, 2013 at 8:42 PM, Muralidhar Balcha <muralidharb at gmail.com>wrote:
>
>> Hi,
>> I have couple of questions on rebalance functionality
>> 1. When I ran rebalancing command, the gluster daemon that is responsible
>> for migrating data is terminating itself in the middle of the data
>> migration. I may be missing something. How do I make the daemon wait until
>> the data migration is complete.
>>
>
> Under normal circumstances, the rebalance daemon terminates when it
> believes it has completed transferring all files it is supposed to. Do you
> have any logs with more details?
>
>
>> 2. This question may not be related to rebalance adding or removing a
>> brick from a volume. If I add a new brick to a volume that is in use, how
>> do existing clients realize the new brick? Is there a notification
>> mechanism that each client refreshes their client volinfo?
>>
>>
>
> Yes, clients are polling w/ glusterd waiting for config changes, and will
> swap to a new xlator graph at run time if necessary.
>
> Avati
>
>


-- 
Muralidhar Balcha
508 494 5007
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