Victor San Pedro wrote:
Hello. I would like to ask you the following question:
Is it possible to use cluster STRIPING to build a fault tolerant system?
For example:
If I have 6 storage servers
I would like to storage my files, all have a big size, splited in the 6
servers ( I think I can achieve that with the striping cluster)
The goal would be to build a fault tolerant system with this striping
cluster with 6 servers...
In the case a server fail, I could still access to all my files...
Could I managed this aim joining STRIPING with AFR? It is possible to do
that with clusterfs (it seems not to be model spec files of it)?
How could I managed this aim? Any ideas?
What is your opinion about other possible ways of managing a fault
tolerant system using as less space as possible with glusterfs?
If you export two volumes per server, and chain your AFR subvolumes
between servers, you should get a fault tolerant system of the type you
are looking for.
Something like this:
Brick X exports two volumes, brickX-1 and brickX-2
UNIFY {
AFR1 { brick1-2, brick2-1 }
AFR2 { brick2-2, brick3-1 }
AFR3 { brick3-2, brick4-1 }
AFR4 { brick4-2, brick5-1 }
AFR5 { brick5-2, brick6-1 }
AFR6 { brick6-2, brick1-1 }
}
If you wanted MORE redundancy, you could export three volumes per
server, and make you AFR's like this:
UNIFY {
AFR1 { brick1-3, brick2-2, brick3-1 }
AFR2 { brick2-3, brick3-2, brick4-1 }
...
Which would be able to survive two server failures without data loss.
--
-Kevan Benson
-A-1 Networks
