HAMMER filesystem update - design document

Matthew Dillon dillon at apollo.backplane.com
Sat Oct 13 16:38:58 PDT 2007

:I hope this question has not been implicitly answered before, but how
:does Hammer handle quotas? Filesystems like XFS and ZFS maintain quota
:information internally so that a quotacheck after a system crash does
:not take ages. It seems to me that Hammer could manage quotas as a
:part of its cluster allocation strategy. Is this the case?

    Theoretically a transaction id can be stored along with the quota state
    and the quota state can be updated on the fly when a cluster gets 
    recovered.  I wasn't planning on implementing quotas in HAMMER for 2.0
    but it's definitely possible to do it without requiring a rescan.

					Matthew Dillon 
					<dillon at backplane.com>

More information about the Kernel mailing list