Will be interesting to hear the resolution. I'll note that this was indeed one of the contentions I made in my first reply on the thread, when I said that if you had files "on another server or SAN/NAS, that i/o can be costly in some configurations (not inherently so, but worth considering)."
But your reply was "I've done a test already to eliminate the Network File Store by setting up a local copy on the server of the files and testing against that, and the results were the same." So as a matter of understanding what happened, do you know why at the time you got misled by that conclusion, which took us off the scent of that trail? Will just be interesting, forensically. Thanks. /charlie > -----Original Message----- > From: cfaussie@googlegroups.com [mailto:cfaus...@googlegroups.com] On Behalf > Of > BarryC > Sent: Wednesday, May 26, 2010 11:23 PM > To: cfaussie > Subject: [cfaussie] Re: Coldfusion 9 and Windows server 2008 64bit > > Hi, > > After some more testing, thread dumps and operating system process > monitoring, we have found that there seems to be a performance issue > with files when accessed via NFS. > The slow part is when file attributes are being requested for a file > on the NFS (this was also shown in the thread dumps with the > getBooleanAttributes() function coming up a lot). > > We have done a couple of tests with rather interesting results (we set > up a specific test that loops over some directories and looks at the > files in those directories, it does a fileExists(..) on each file in > those directories); > > 1. test local file access time. > 2. test file access time via share mounted via NFS path e.g. \\server > \path\sharedfiles\ > 3. test file access time via an iSCSI mounted drive (still over the > network, but the operating system sees it as a lettered drive e.g. d: > \sharedfiles\ > > The local file access time was very fast, for the 20 folders it did it > in between 16ms and 50ms > The FMS access time was very slow, about 3 seconds for the same 20 > folders (I'd expect some delay over the network, but this seems rather > a lot). > The iSCSI mount was surprisingly fast at about 130ms (indicating that > network latency time isn't really the issue?) > > We're a bit stumped, and the systems guys have had a look at options > at the NFS end and there doesn't really seem to be much configuration > they can do there. > > Kai, you mentioned that you run some of your servers with an NFS > share, but have no problems, how is your share implemented, do you run > it on Linux with the windows servers connecting to that? > > Regards > Barry -- You received this message because you are subscribed to the Google Groups "cfaussie" group. To post to this group, send email to cfaus...@googlegroups.com. To unsubscribe from this group, send email to cfaussie+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en.
