id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	blockedby	blocking	changelog
133	Integrate an automatic index backup mechanism	damato		"It might be worth to implement a kinda automatic index backup mechanism. This mechanism should e.g. automatically rename an index file right before regenerating an index or even before every write operation of an index file. (e.g. rename it to .index.bakX where X stands for a counter).

Then if an operation failed or if an index rebuild was aborted by the user the latest backup can be restored and the old index being used from now on.

However, this mechanism would probably require a new index version as an index might have to contain a variable where the total amount of mails and a kind of checksum is stored, hence the scheduled task for 2.7+"	task	closed	normal	YAM 2.7	MIME handling		major	wontfix