Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
/ 2007-01-19 12:25:31 +0100 \ Ralf Schenk: > Hello ! > > I want to use drbd (0.8rc2) on top of two logical volumes. Can I use the > "flexible-meta-disk" on a third logical volume as meta-disk for both > drbd devices ? > > I tried setting "flexible-meta-disk /dev/VG/drbd[0]" and > "flexible-meta-disk /dev/VG/drbd[1]" which doesn't work. > > I now used "meta-disk /dev/VG/drbd[0|1]" which is ok, but in the manual > there is areference to LVM for the flexible-meta-disk > > "With the flexible-meta-disk keyword you specify a block device as > meta-data storage. You usually use this with LVM, which allows you to > have many variable sized block devices." "meta-disk" is fixed size, and takes an index. "flexible-meta-disk" uses only the space needed, and does not understand and index. what we usually do is have a lv for the storage, and an lv for the meta data. storage_size_in_GB=500 # storage lv is drbd0 lvcreate -n drbd0 -L ${storage_size_in_GB}G ... <vgname> ... # very rough formula meta_data_size_in_MB=$[2 + storage_size_in_GB / 32 ] # will round it up to the next multiple of PE size anyways: # meta data lv is drbd0-md lvcreate -n drbd0-md -L ${meta_data_size_in_MB}M ... <vgname> ... then use flexible-meta-disk drbd0-md hth, -- : Lars Ellenberg Tel +43-1-8178292-0 : : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 : : Vivenotgasse 48, A-1120 Vienna/Europe http://www.linbit.com : __ please use the "List-Reply" function of your email client.