Re: [Moosefs-users] chunk distribution & striping

[Steve <st...@bo...>]

Hi,



The idea is that when you loose the first drive moosefs will re-address the
balance by making copies. Unless you loose 3 chunkservers at the same time
(highly unlikely) youd be fine. More chunkservers than the highest goal are
required for security. More the better. 

 

Steve 

 

 

-------Original Message------- 

 

From: Ethan Tuttle 

Date: 04/03/2011 09:38:46 

To: moo...@li... 

Subject: [Moosefs-users] chunk distribution & striping 

 

I have a question about Moose FS' chunk distribution algorithm. Due to the
striping, an entire set of files with a given goal can be lost rather than
just the files on failed devices. In other words, with 10 disks and all
files goal=3, you likely lose the the entire filesystem if three disks go
down. 

 

Will MooseFS be improved in this area? Perhaps the chunk distribution could
tend to put files on the same disks? I realize this isn't a trivial problem
but I'm curious if it is on the roadmap. 

 

Regards, 

 

Ethan 

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