Yes, it's definitely safe to delete wheneven the server is shut down. We remove it as part of the startup script at FastMail, just in case something crashed. Both sync_server and sync_client will create it if necessary. You can probably remove it safely, but if Cyrus is running and using replication there is a theoretical probability that a new process will start up with that PID and decide to use the directory!
Bron. (pretty theoretical for us, we've gone for large PID space for a few years now, so they don't get recycled very fast) On Tue, 22 Nov 2016, at 22:23, Karl Pielorz via Cyrus-devel wrote: > > Hi, > > We've upgraded a number of Cyrus servers through the years - we're > currently running 2.5.x. > > The other day I noticed on a couple of servers we have: > > /vol/imap/spool/sync. > > This directory hasn't been touched in years - but has a number of sub-dirs > (all numbers) - that all contain messages (again, created years ago). > > Am I safe to remove this directory? > > We also have: > > /vol/imap/sync > > Which periodically has files created in it (the server is sync'ing to a > another machine - so that's expected). > > But I can't tell if 'vol/imap/sync' is a replacement [now, after upgrades] > for 'vol/imap/spool/sync.' - i.e. if the 'sync.' directory can either be > cleared out (and left), or just got rid of all together. > > > Cheers, > > -Karl -- Bron Gondwana br...@fastmail.fm