[Gluster-users] Updating gluster configuration

[Matt Lawrence]

I have maintenance windows on Wednesday & Thursday to make changes to 
the throughput cluster here and I could use some advice.

There are 130 system, 126 of them are compute nodes, connected via Gb 
ethernet with the head node and fileserver node connected via 10Gb 
ethernet.  At the moment, my configuration from last summer, which was 
done in a hurry, is running really, really slow.

My hope is to upgrade to 1.4.0, but I'll settle for a release candidate 
if I have to.  Here is the rough plan for how I'm going to configure it.

Server:
XFS filesystem -->> io-thread -->> tcp


Client:
brick -->> readahead -->> writebehind

Should I be considering readahead/writebehind on the server end?
How about threads on the client?
Any other translators I should consider?

I'm hoping to spend much of Thursday doing performance testing.  What 
benchmarks do y'all recommend?  I was planning on trying iozone, but 
could easily be convinced to go with something else.  The plan is to 
script it to run automatically with a number of different settings for 
readahead & writebehind.  Any particular words of wisdom?

Thanks for the help!

-- Matt