[Quickfix-developers] Semi OT : QF internal data hotbackup

[John G. <joh...@wa...>]

Hi there,

Planning for disaster (happy new year 2007 all ;-)...) I need to (better)
plan what to do in case the QuickFix machine goes down. 

Environment is either linux RH or solaris 9, QF is C++.

So far I am backuping every so often the directories pointed by
FileStorePath i.e.  sequence number and session "queue".  We are
considering moving this data to an NFS partition, so of course my
"performance issues warning" goes off. I am also concerned, in both cases,
about concurrent file access / invalid files on backup.

Can anyone please tell me :

- if just backuping more regularly is considered enough, are there any
risks of copying a corrupted/incomplete file ? I did not check but I guess
QF opens its file pointer when the session starts and closes it when it
stops.

- if we go for NFS, how does QF handle the FS access to what is stored in 
FileStorePath ? Does it work in RAM and flushes to disk from time to time 
(with explicit fflushes or the OS decides) or are the messages reloaded 
from disk every so often ? 

TIA for any information.

JG