On Aug 2, 2009, at 12:12 AM, likaijun wrote:
Now I set aggregation and switch side well , 2 e1000g NIC cards to a aggr interface .and use IOmeter test its bandwidth is: when sequntial read it is more than 210MB/s (script is block is 32k or 64K) .I think it's good .But sequntial write is less 70MB/s. and I use a single NIC card (1Gb/s)to test ,sequntial is about 100MB/ s . I'm very confused. why read performance is very good but write performance is very awful.why 2 nic aggr interface performance is not better than 1 nic card?
You are writing data to disks? From your description, it would seem that writes to disk is your bottleneck - topping out at 70MB/s no matter how much network bandwidth you throw at it.
If you're trying to test only the network throughput of your aggregated set of links, you will certainly want to take the disks out of the picture.
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