Cyrus 2.3

[David Carter]

On Fri, 5 Aug 2005, Amos wrote:

> WRT 2.3, IIRC, there was a feature such that deleting a message would 
> not physically delete the message but just hide it from the user. That 
> way a recovery wouldn't require pulling stuff off of tape (assuming the 
> message was there last time backups ran.) Am I remembering this 
> correctly? (I haven't had a chance to play with CVS source in ages, 
> alas.)

The code in 2.3 does "delayed" expunge. This was, if I recall correctly, 
originally put in as a performance enhancement (unlink can be expensive). 
But if the messages are left on disk, unexpunge becomes possible.

> Anyway, assuming I'm remembering things correctly, what about folder 
> deletions? Is the folder and it's contents physically blown away, or is it 
> also just hidden from the user?
>
> Recently have been learning about the snapshot capabilities of some of 
> our new SAN stuff, but got to wondering if some of these features in the 
> up-coming 2.3 would make that somewhat unnecessary.....

2.3 doesn't retain deleted mailboxes: the messages are removed from disk 
immediately.

-- 
David Carter                             Email: David.Carter at ucs.cam.ac.uk
University Computing Service,            Phone: (01223) 334502
New Museums Site, Pembroke Street,       Fax:   (01223) 334679
Cambridge UK. CB2 3QH.
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