On 06/17/2016 03:05 AM, Manuel Padrón Martínez wrote:
Hi:
I have a big doubt.
I have 2 servers with 2 disks of 2 TB each. I've been thinking to create a volume with stripe 2 replica 2 creating a brick with each disk and using server1:/b1 server2:/b1 server1:/b2 server2:/b2.
Striping is not actively developed. Sharding [1] is the successor to it.
This seems to work fine 4TB of space and if one disk or even one server fails the volume is still there. But I just found disperse volumes, I understand that disperse 4 redundancy 2 work in the same way.
Any suggestion on which solution is better?
It depends on your workload really.
which one is faster?
Replica volumes are faster than disperse because there is no erasure
code math to be done during I/O but as is obvious, you'd get less
volume space than disperse.
which one you'll recommend?
For high I/O rate workloads, replica could be a better choice. You
should try both and see what works best for you.
Btw, you need 6 bricks for a 4+2 disperse configuration.
-Ravi
[1] http://blog.gluster.org/2015/12/introducing-shard-translator/
Thanks from Canary Islands
Manuel Padrón Martínez
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