Re: [HTCondor-users] Can we backup Central Manager's database and states?

[Todd L Miller <tlmiller@xxxxxxxxxxx>]

> 1. Does CM keep a database to store it's job queue to make it persistent?

	The central manager doesn't maintain a job queue; that's the 
responsibility of the access point (submit node).  The central manager has 
only "soft state" unless you turn on specific features ("offline" or 
"absent" ads, mostly), meaning that it will automatically regenerate all 
of its state after a few minutes of normal operation.  You should be able 
to replace one central manager with a new one (at the same address) with 
little to no loss of service.

	That's all totally different for an access point (submit node), of 
course.  IIRC, the only hard state that HTCondor keeps is in the directory 
pointed at by the SPOOL configuration knob.  Of course, jobs in the queue
will almost always point at files on the local disk, so restoring just the 
queue won't be particularly helpful.

- ToddM