Hot backups

[Rob Siemborski]

On Fri, 14 Nov 2003, Simon Matter wrote:

> IIRC taking a snapshot with LVM/XFS takes just a few seconds. I guess
> everything should continue after the snapshot. What do the cyrus processes
> do if they receive SIGSTOP? Will they stop immediately or will they not
> stop at all? I mean, if a process receives SIGSTOP while it writes to a
> file, will the write finish before the process stops?

I'm pretty sure if you just stop the processes where they are, you'll
still get an inconsistant store.  (E.g. the mail file is written out, but
the index files aren't yet updated).

-Rob

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Rob Siemborski | Andrew Systems Group * Research Systems Programmer
PGP:0x5CE32FCC | Cyert Hall 207 * rjs3 at andrew.cmu.edu * 412.268.7456
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