Re: [Moosefs-users] speed up balancing

[Michal B. <mic...@ge...>]

Hi!

 

Absolutely the fastest way would be (for each chunkserver):

1.       Stop the chunkserver X

2.       Copy (just using 'cp') all files from the old disks to the new ones

3.       Run the chunkserver X using the new disks (of course the
chunkserver may now run on a new mainboard, etc.)

 

The standard method would be connecting new CSs along with the old ones
(perfectly all in the same moment) and marking all the old disks for
removal. Then you have to wait until system migrates chunks to the new
servers. But it would take several days.

 

 

Kind regards

Michal

 

 

From: Thomas S Hatch [mailto:tha...@gm...] 
Sent: Friday, March 04, 2011 6:43 PM
To: moosefs-users
Subject: [Moosefs-users] speed up balancing

 

I am currently migrating my moosefs environment into a new setup, new OS,
new partitioning, changing out disks for larger disks etc.

 

So I need to be able to take a chunkserver down, delete the chunks on it,
and then have it rebalance as quickly as possible back into the overall
moosefs cluster, what is the fastest way to do this? Should I make the
chunks for removal before taking them offline? Will that speed up the
balancing?

 

-Thomas S Hatch