Re: Many open/close on same files yeilds "No such file or directory".
From: Jesper Krogh
Date: Fri May 02 2008 - 11:59:27 EST
Ray Lee wrote:
On Fri, May 2, 2008 at 8:19 AM, Jesper Krogh <jesper@xxxxxxxx> wrote:
Jesper Krogh wrote:
I'd suspect that after 1e8 loops your CPU got too hot and started to
misbehave.
Hardware is an Sun Fire X4600 (8xdual-core AMD64 processors). The
problem seem to be tied to this filesystem. (I cannot havent been able
to reproduce it on the /-mounted disk of the same system. So if a cpu
problem.. then it shouldn't be tied to a specific filesystem?
This is the only activity on the system .. so a load of 1 / 16cpus.
I've tried to explore this suggestion (the best I could).
There are 2 ext3 filesystems locally mounted. / and this one. Running 16
parallel runs of this program on a file on the /-mounted filesystem cannot
reproduce the problem. If it was linked to hot hardware, I believe I should
be able to reproduce it this way. The servers are in a 17 degress
serverroom.
It changes alot when.. it actually happens. The "earliest ones" has been
from 200000 cycles.
Run 16 in parallel on /, and another 16 simultaneously on the trouble
filesystem? If you continue to get errors only on the 'trouble'
filesystem, and no errors start occurring on / coincident, then it
sounds pretty localized.
That test has been done. I can only reproduce it on this filesystem. But
I cannot really conclude that it is only present there.. since sometimes
my testprogram just goes on .. and dies past 1 billion cycles. But I
have never gotten errors from the / filesystem on the same installation.
BTW, I may have missed this earlier, but does it happen *anywhere* on
the troublesome filesystem (ie, in a newly created subdirectory)?
I'll run that test now.
--
Jesper
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