Re: [Moosefs-users] Chunks replication : preference to "rebalance" instead of goaling

[Michał B. <mic...@co...>]

Hi Florent!

We are aware of this behaviour and it is on our "todo" list to be improved.

Regards
Michał
MooseFS Support Manager


-----Original Message-----
From: Florent Bautista [mailto:fl...@co...] 
Sent: Saturday, April 28, 2012 1:17 PM
To: moo...@li...
Subject: [Moosefs-users] Chunks replication : preference to "rebalance"
instead of goaling

Hi all,

It seems that on my MooseFS installation, the master server prefers to
rebalance over CS chunks with goal satisfied, instead of taking care of
chunks in undergoal situation.

I added a CS recently, and after a master restart, some chunks have only 1
valid copy (goal 2 or 3), and it stays like that for a few minutes
(undergoal chunks are decreasing very slowly). During this time, some chunks
where rebalanced over CS (I see that because some chunks are getting
overgoal, then deleted, etc...).

Is it possible to set a more important priority on chunks that are undergoal
? And only then rebalancing the others. It's very dangerous because some
files could have only one valid copy during hours...

I'm on 1.6.24, with 4 CS and 1 ML. Debian Squeeze for all, except the last
added CS on FreeBSD.

My config is the default one except:

CHUNKS_WRITE_REP_LIMIT = 3
CHUNKS_READ_REP_LIMIT = 10

Thank you for help :)

Flo

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