Hi Sebastian,
What sort of servers are these? How much memory? What network? This will
help understand performance relative to possible peaks.
Thanks,
Rob
Sebastian Bauer wrote:
Hi Sam,
Sam Lang wrote:
Can you walk through your setup and testing environment in a bit more
detail? What kind of performance numbers are you getting from the
kernel interface and pvfs2 apps? Does the performance degrade over
time the longer you have the kernel mounted, or does it start off bad?
I installed the pvfs2 server on two servers playing all three roles.
Furthermore, there are few computers acting as clients only. Using
pvfs2-cp from a test computer, which is a client only, I get around
10MB/s which is okay for the 100Mbit ethernet connection. But if I use
the cp command, I cannot measure anything, it seems to stall (however,
the destination file grows slowly, but not more than 2kb(!) per second
on average!
Copying from the pvfs2 to the client-only computer is faster, about
3MB/s using kernel interface (cp command) whereas the pvfs-cp gives me
again about 10 MB/s.
It's different when I copy the file from one master to another master.
Concerning the write operation, using the kernel interface, I get around
9.5MB/s whereas I get 35.71 MB/s using pvfs2-cp (there is a faster
connection between both master installed)
I've haven't yet done long time tests, but except those 2kb/s everything
is acceptable in our setting.
Hope this helps. Please tell, if you need anything else to know.
Ciao,
Sebastian
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