Re: [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 <address@hidden> wrote:

On Sun, Nov 24, 2013 at 8:42 PM, Muralidhar Balcha <address@hidden> 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

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Muralidhar Balcha
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vault-rebalance.log
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