BUG? File descriptor use in cmd_append (for MULTIAPPEND) results in many open files

[Clint Dilks]

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 
> e-mails?
>
> -nik
>
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