id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
886	Prevent simultaneous use of a data directory	dstillman	dstillman	"Among other things, this is to make using Zotero over a network drive safer.

If a locked data directory is opened, there could be a warning saying the database is locked (with some indication of the time it was last accessed) and asking if the user wants to override, but Zotero might need to check the lock file every single time it writes to the DB if we want to prevent corruption. I guess we can test that to see if there'd be a performance penalty.

On the other hand, we don't necessarily need to protect against simultaneous use as long as the warning is clear. If someone left Zotero open on Computer A and wants to work on Computer B, Computer A is theoretically not in use, so as long as Zotero on Computer A checks the lock file periodically, or before a write operation coming after a period of inactivity, and before it attempts to do the shutdown backup, it may not be a problem."	enhancement	new	major		data layer	1.5