Hi guys, I'm used with iSCSI, actually using Equallogic arrays and with Linux and systems administration, because that's my job. I feel very excited about the SCSI target feature you develop. I'd like to try to build a scale out SAN with LIO. I've read a lot about it, but every configuration I got on the internet was single node, or active/passive configuration with DRBD. Here is the plan : -using a SAN as backend storage. This SAN will be composed of SAS arrays connected to a SAS switch fabric. -using several target nodes connected to the SAN -having LVM on top of RAID devices -exporting LVM devices as iSCSI targets -using dm-multipath on the clients to access the targets in an active/active way I've been looking to http://sourceforge.net/apps/mediawiki/scst/index.php?title=SCST,_DRBD_and_Dual_Primary_Mode, and this looks like what I wanna try : shared storage as backend(DRBD in this example), write-through (consistency), and keep away initiators that use SCSI reservation as this cannot be shared among nodes. I have a lot of question about that : -to use LVM on several node, I'll be using CLVM (I've been playing with GFS2, so I know it a little bit). One problem I see is snapshots. As far as I know, CLVM does not support snapshots. Has it changed, is it planned, or if not, how do I make snapshots ? -can I safely have my target nodes access the shared storage in an active/active way ? I'd like to use FILEIO mode to benefit from kernel page cache, can I (I'm thinking about consistency issues) or am I stuck to BLOCKIO or I cannot do anything of that ? -It seems if that if possible, I'll still get SCSI reservation issue between the nodes (because they are not cluster aware). Is it planned to provide target clustering? Every help/comment will be welcomed. Regards -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
