Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Am 18.03.13 20:05, schrieb Stephan Budach: > Am 18.03.13 10:07, schrieb Lars Ellenberg: >> On Sun, Mar 17, 2013 at 08:19:26AM +0100, Stephan Budach wrote: >>> Hi all, >>> >>> I am running DRBD 8.4.3 in a dual-pri setup. DRBD interlink is >>> through a 10 GbE Intel Cx520 link, which is piggy-backed between the >>> two Supermicro boxes. I have configured two SCST iscsi targets from >>> two DRBD volumes, which configured as multipathed targets on three >> Don't. >> >> Simply: Don't. >> >> >> Multipath expects to talk via more than one path to *the same target*. >> >> What your setup does it have multipath talk (via one path each) to >> *two different targets*, that don't know of each other, >> and happen to be able to present the same data most of the time. >> >> As iSCSI is not just about READs and WRITEs, but, especially in a >> clustered setup, about reservations and other management commands, >> this CAN NOT WORK, and that is NOT drbd's fault. >> >> So just don't. >> >> Thank you. >> >> >> Lars >> > Hi Lars, > > > okay, point taken, but what about the issue with drbd disconnecting > when both primary get under high load? Even without iSCSI access this > shouldn't happen, should it? > > > Thanks, > Stephan > Btw, LIO does support SCSI3 persistent reservations, so one could swap scst with LIO and build multipathed iSCSI targets with it, unless I am mistaken and have misread anything. Regards, Stephan -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20130319/1ef6914a/attachment.htm>