On 07/07/2011 10:01 AM, Papp Tamas wrote:
On 2011-07-07 15:42, Joe Landman wrote:
The same on the cluster volume is ~50-60 MB/s.
This is what you expect over GE, more towards the lower end of the
range (assuming a non-optimized driver and network stack).
Why? It's GE, 60MB/s is about ~500Mbit. I expect to be at least
~900Mbit. Am I dreaming?:)
This is very dependent upon the IO patterns, driver, switch, port
contention, ...
We do see 900+ Mb/s (it makes more sense to talk about this in terms of
MB/s). Best case you will see over a 1 GbE wire is about 117 MB/s +/-
some. To get there, you need to be doing large enough writes/reads for
it to be meaningful, not suffer port contention, and a few other things.
[...]
I don't understand this. What are your needs, and what are your
expectations based upon those needs? Do you have the right equipment
to meet the needs, or do you need to buy more/better equipment to meet
the needs?
800-1000Mbit/s would be enough to me.
Try removing the channel bond.
Actually I had never tested, that would be the optimal for our purposes.
We do the best from the tools we have, and if it's not enough, the boss
starting to think over it...
I know, this is not the best way, but we have this:)
What can be the bottleneck for our system, GE?
Would 10GE for server help on this much more (single machines to cluster
connection).
This is a complex and hard question to answer, and it involves a deep
investigation of your system, the IO patterns, etc.
Thank you,
tamas
ps.: What do you mean on optimizing network stack, jumbo frame?
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