BUG? File descriptor use in cmd_append (for MULTIAPPEND) results
in many open files
clintd at scms.waikato.ac.nz
Mon Dec 11 15:19:26 EST 2006
Hi, have you considered using imapsync instead?
Nik Conwell wrote:
> I'm using the UW mailutil to transfer mailboxes from UW to Cyrus
> (2.3.7). It uses APPEND, specifically multiappend (single APPEND with
> multiple messages being appended). Cyrus-imapd handles this
> multiappend by creating stage files for each appended message and
> leaving the file descriptor open. The problem is that after 240
> messages, we run out of file descriptors and so an open() of the next
> stage file fails with EMFILE. I updated /etc/cyrus.conf to make the
> max fds be 1024 (AFAICT kernel MAX) which helped somewhat but not for
> larger mailboxes with > 1008 messages.
> Shouldn't the multiappend/append be closing the FD for each stage file
> and then reopening it later as it needs it?
> Do people just tweak their kernels to have some insane number of FDs
> available in order to compensate for this?
> Or, do people not use mailutil and instead use something that issues
> multiple append commands rather than a single append with multiple
> Cyrus Home Page: http://cyrusimap.web.cmu.edu/
> Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
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