[Gluster-users] Single server (NAS) and gluster advantages

[Io Noci]

i'm not sure wether i got everything right. you are using glusterfs as a 
substitute for nfs. if you are using it on infiniband, then you probably 
could get some performance with combining io-threads, write-behind and 
as many raid-5 partitions the controller could handle. on ethernet i 
thing glusterfs isnt yet fast enough for io-killers, but probably it 
could be performing better than nfs using perfomance-translators on the 
client side.

Io Noci

Sean Davis schrieb:
> We have a largish NAS, a single linux box, with 40 drives.  They are 
> currently configured as 2 RAID-6 arrays.  The machine has two RAID 
> controllers.  This serves as a file system for a small cluster with 
> about 10 nodes, 60 processors, total.  We have some very IO-intensive 
> applications that simply crush our NAS.  Load averages go to 40+ and 
> we see about 40% wait.  The RAID is incredibly fast with about 700 
> MB/second serial read, but the sustained concurrent access is much 
> lower.  We would like to look at how gluster could be used to speed up 
> concurrent access to this single machine.  Any insights into using 
> gluster in this type of situation?  We thought about slicing up the 40 
> drives into 8 RAID-5 partititions and then serving them using 
> gluster.  We wanted to stay away from full AFR given the increased 
> cost/TB.  We are mainly interested in knowing whether we need another 
> machine or whether we can make do with our current NAS after 
> reconfiguring to use gluster. 
>
> Thanks,
> Sean
>
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