Le Sun, 28 Nov 2010 16:42:01 +0100 vous écriviez:
> Le Sun, 28 Nov 2010 23:20:56 +0800 vous écriviez:
>
> Hello, The test two nodes are connected by GigE (1000Mb), one is set
> as metadata/io server, another is client. Each node has
> 4-cpu(1.6GHz), 1 sas harddisk, 4G memory( iozone test data is 8G,2x
> of it).
> The client use kernel mode(insmod pvfs2.ko and mount).
You said that you tested with 1 client and 1 server and got 85 MB/s.
This is very good, given that your local disk performance is about 100
MB/s. You could at most double this speed if both nodes were data nodes,
though. A node can be both an io server and a client at the same time.
With one client and 30 servers you mentioned that you reached only 40
MB/s. Are you running the same 1 thread benchmark? 1 thread won't
perform well using PVFS; you know "P" in PVFS stands for "parallel", it
will work much better with more working threads; at least as many
threads as data nodes would be a good start.
--
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Emmanuel Florac | Direction technique
| Intellique
| <[email protected]>
| +33 1 78 94 84 02
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