I'm pulling my hair out on this one and hope that someone has seen this before.
My (currently) two NSD servers run samba/CTDB. Windows 7 clients use robocopy to get data from CIFS. Performance is okay 70MB/sec give or take. However, if I do the exact same call as, say,
os.system("robocopy \\gpfs\blah\blah2 c:\tmp")
will crawl at about 4-5MB/sec.
Curiously, if I run the above on a win2008 R2 box, with native GPFS, performance is normal. I monitor the NICs and am sure that the traffic is in fact coming over CIFS rather than the internal gpfs driver.
When I first started looking I was thinking that python was the problem, but I see the same thing, with perl. So it's the OS, but how is working when GPFS runs on the system even though I'm not using a native GPFS path. I'm starting to look at hotfixes, windows updates.
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1 reply Latest Post - 2013-03-06T09:52:20Z by botemout
Pinned topic Strange behavior when calling robocopy from python
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Updated on 2013-03-06T09:52:20Z at 2013-03-06T09:52:20Z by botemout