Greetings,
Thanks for your previous answers on the compatibility 2.7.1/ 2.8.1
I have a strange problem:
Version 2.7.1
I/O server AMD Opteron 2350 kernel 2.6.18-164.el5
Client AMD Opteron 2350 kernel 2.6.18-164.el5
In this configuration cp a file from pvfs (using the kernel interface)
is running at 40MB/s
If the client is an Intel Xeon 5550 and the kernel 2.6.18-164.el5 the
cp is running at 9 MB/s
and it could go as low as 1.9MB/s with block size of 32KB (dd
if=testfile of=/dev/null bs=32K count=2000)
I did a test with an older kernel 2.6.18-128.el5 on the Intel Xeon 5550
an I get a transfer speed of 40MB/s even with 32K block.
So something has changed in the 164 version. I tested also the version
2.6.18-164.6.1 and get the same low speed.
Is this a known problem?
Claude
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