drbd allows 2 nodes to be active/active with their local harddrives shared. It is only valid on 2 nodes though. Are there any solutions that scale to more than 2 nodes? Thanks, Jon.
On Wed, Jun 20, 2007 at 10:40:55PM -0500, Jon Gabrielson wrote:> drbd allows 2 nodes to be active/active with their local > harddrives shared. It is only valid on 2 nodes though. > Are there any solutions that scale to more than 2 nodes?iSCSI and AoE. Joel -- "I almost ran over an angel He had a nice big fat cigar. 'In a sense,' he said, 'You're alone here So if you jump, you'd best jump far.'" Joel Becker Principal Software Developer Oracle E-mail: joel.becker@oracle.com Phone: (650) 506-8127
The way I understand it, those only support a single harddrive. So I'm guessing the correct solution is to use drbd on 2 systems and export the drbd drive to the rest of the systems using iscsi, aoe, etc.. or is there a way to use all 4 local harddrives using iSCSI or AOE? Thanks, Jon.> On Wed, Jun 20, 2007 at 10:40:55PM -0500, Jon Gabrielson wrote: >> drbd allows 2 nodes to be active/active with their local >> harddrives shared. It is only valid on 2 nodes though. >> Are there any solutions that scale to more than 2 nodes? > > iSCSI and AoE. > > Joel > > -- > > "I almost ran over an angel > He had a nice big fat cigar. > 'In a sense,' he said, 'You're alone here > So if you jump, you'd best jump far.'" > > Joel Becker > Principal Software Developer > Oracle > E-mail: joel.becker@oracle.com > Phone: (650) 506-8127 >
> iSCSI and AoE don't have a limitation to one drive that I > know of. That would be really silly.I ment that only one node can be doing the exporting.> If I were you, I'd dedicate one node to storage and have it > serve the iSCSI or AoE, and have the other nodes run the filesystem. If > you *do* decide to try and have a machine both host the disks and run > the filesystem, make sure you mount the iSCSI/AoE, not the local disk.Is this safe? I know that nbd and gnbd both say that reimporting an exported share is a bad idea. Is it safe with iSCSI and/or AOE? Jon.> > Joel > > -- > > "The opposite of a correct statement is a false statement. The > opposite of a profound truth may well be another profound truth." > - Niels Bohr > > Joel Becker > Principal Software Developer > Oracle > E-mail: joel.becker@oracle.com > Phone: (650) 506-8127 >