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From: Shankhadeep S. <sha...@gm...> - 2012-07-16 14:32:20
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I wouldn't call it legacy, implicit/explicit ALUA is fine grain path control and combined with session recovery will allow you to create a clustered storage system. On Jul 16, 2012 3:35 AM, "Pasi Kärkkäinen" <pa...@ik...> wrote: > On Mon, Jul 16, 2012 at 01:23:49AM -0400, Shankhadeep Shome wrote: > > Not really Michael, if you're interested in dual primary mode you can > look > > into LIO which supports ALUA. > > > > Isn't ALUA (Asymmetric LUn Access) the "legacy" method of having a primary > and secondary path for a LUN? > How does it help with dual-primary active-active? I thought it was only > used for active-passive. > > -- Pasi > > > You can use this feature with the linux port > > of ZFS (use zfs import ) and pull something together than may work. > > [1]http://linux-iscsi.org/wiki/Main_Page > > [2] > https://groups.google.com/forum/?fromgroups#!topic/linux-iscsi-target-dev/QrZiOnLEzeo > > On Wed, Jun 20, 2012 at 2:05 PM, Kushnir, Michael (NIH/NLM/LHC) [C] > > <[3]mic...@ni...> wrote: > > > > No. This has been beat to death already. See: > > [4] > http://fghaas.wordpress.com/2011/11/29/dual-primary-drbd-iscsi-and-multipath-dont-do-that/ > > > > Michael > > > > ________________________________________ > > From: Luca Lesinigo [[5]lu...@lm...] > > Sent: Wednesday, June 20, 2012 1:21 PM > > To: [6]isc...@li... > > Subject: [Iscsitarget-devel] Multipath to two IET nodes? > > I can put together two linux servers and use DRBD in dual-primary > mode > > to get a shared block device with concurrent read/write access on > the > > two nodes. > > > > Can I then export an iSCSI target from each node and use the two > like a > > single multipath iSCSI device? > > eg. to simulate a dual-controller iSCSI storage array > > > > I would guess it is possible if the iSCSI multipath implementation > > assumes completely independent targets for the multiple paths, and > it > > would fail if the two need to know about each other. But I don't > know > > iSCSI enough to answer that question :) > > > > thanks, > > -- > > Luca Lesinigo > > > > > ------------------------------------------------------------------------------ > > Live Security Virtual Conference > > Exclusive live event will cover all the ways today's security and > > threat landscape has changed and how IT managers can respond. > > Discussions > > will include endpoint security, mobile security and the latest in > > malware > > threats. [7] > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > _______________________________________________ > > Iscsitarget-devel mailing list > > [8]Isc...@li... > > [9]https://lists.sourceforge.net/lists/listinfo/iscsitarget-devel > > > ------------------------------------------------------------------------------ > > Live Security Virtual Conference > > Exclusive live event will cover all the ways today's security and > > threat landscape has changed and how IT managers can respond. > > Discussions > > will include endpoint security, mobile security and the latest in > > malware > > threats. [10] > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > _______________________________________________ > > Iscsitarget-devel mailing list > > [11]Isc...@li... > > [12]https://lists.sourceforge.net/lists/listinfo/iscsitarget-devel > > > > References > > > > Visible links > > 1. http://linux-iscsi.org/wiki/Main_Page > > 2. > https://groups.google.com/forum/?fromgroups#!topic/linux-iscsi-target-dev/QrZiOnLEzeo > > 3. mailto:mic...@ni... > > 4. > http://fghaas.wordpress.com/2011/11/29/dual-primary-drbd-iscsi-and-multipath-dont-do-that/ > > 5. mailto:lu...@lm... > > 6. mailto:isc...@li... > > 7. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > 8. mailto:Isc...@li... > > 9. https://lists.sourceforge.net/lists/listinfo/iscsitarget-devel > > 10. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > 11. mailto:Isc...@li... > > 12. https://lists.sourceforge.net/lists/listinfo/iscsitarget-devel > > > > ------------------------------------------------------------------------------ > > Live Security Virtual Conference > > Exclusive live event will cover all the ways today's security and > > threat landscape has changed and how IT managers can respond. Discussions > > will include endpoint security, mobile security and the latest in malware > > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > > _______________________________________________ > > Iscsitarget-devel mailing list > > Isc...@li... > > https://lists.sourceforge.net/lists/listinfo/iscsitarget-devel > > |