[Gluster-users] >1PB

Nathan Stratton nathan at robotics.net
Fri Feb 17 14:35:11 UTC 2012

On Fri, 17 Feb 2012, Song wrote:

> Hi,
> We have the same question. How many nodes are suitable in one gulsterfs?
> For example, volume type: DHT + replication(=3)
> There are 240 nodes server. Server information is:
> disk: 12*1.8T
> network: Gigabit Ethernet
> 40 nodes * 6 clusters?
> 60 nodes * 4 clusters?
> 80 nodes * 3 clusters?
> 120 nodes * 2 clusters?
> 240 nodes * 1 cluster?
> What are limitations to scale larger cluster of glusterfs?

Gluster can easily support a large number of nodes, the question is how 
much you care about the underlying data. We store 2 copies of the data and 
our underlying hardware is RAID6 allowing us to lose 2 disks on each 
server. As the number of nodes grows that chance of losing a node becomes 
higher, but one of the beautiful things about Gluster is you still have 
access to all the other data that is NOT on the lost pair of servers. We 
have found that your best bet is to split the data over as many servers as 
possible provides the best up time.

Nathan Stratton                                CTO, BlinkMind, Inc.
nathan at robotics.net                         nathan at blinkmind.com
http://www.robotics.net                        http://www.blinkmind.com

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