file open for write fails under stress

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I have an application that open many files for writing very fast, in a
way - it can almost be looked as a file system stress test.


my application is single threaded, and I noticed the following problem
when running a single instance of it:


at some point, after opening (and closing) many files for writing, the
application fails to open a file for writing.

if I sleep for 1 second and try again, it works.


my NFS server runs Debian etch 32 bit, with

nfs-kernel-server and nfs-common (1:1.0.10-6+etch.1).


client is also etch 32.

kernel on both is :2.6.18-6-686 #1 SMP Tue Jun 17 21:31:27 UTC 2008 i686


both machines are quad core.



I tried to mount with tcp and udp, and tried both sync and async export
point.


is this a known issue?

any known workaround that will not require messing up the application
with retry logic?


    Omry.

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