On Tue, Sep 10, 2002 at 12:00:05PM -0700, Anthony Johnson wrote: > I know there are 2 allocation policies, contiguous and next free. Is > there any information that describes in detail how LVM determines the > extents to assign to a logical volume with it is created or extended? It goes by the sequence defined by the internal PV number shown by "vgdisplay -v". Free space on PVs with lower internal is allocated first. > For example, if the policy is "contiguous", must the LV contain all > contiguous extents Yes. > or does it use a "best-case" scenario, No. > and how would > that work? Likewise, in the "next free" scenario, is there any weight > given to contiguous space, does it automatically allocate across PVs, > etc? No, there's no weight. In both cases it does allocate accross PVs. In the contiguous case, it can't allocate on the same PV unless there's free space after the already allocated extents. You need to use pvmove if there's not free space following to move extents allocated to other LVs away. > > Thanks! > Anthony > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
