On 11/17/12, Steven Crothers <steven.crothers at gmail.com> wrote: > Hey everyone, > > Is anybody aware of a /true/ active/active multi-head and multi-target > clustered iSCSI daemon? Hi Steven, If i'm correct you are looking for a shared storage clustering setup with HA. Does this help http://www.quadstor.com/tech-library/135-high-availability-with-shared-storage-clustering.html Please note that i have only used their software in a stand alone installation and cannot give feedback on the clustering feature. Also i'm not sure if its works LVM - check with them. jb > IE: > > Server 1: > Hostname: host1.test.com > IP Address: 10.0.0.1 > > Server 2: > Hostname: host2.test.com > IP Address: 10.0.0.2 > > Then they would utilize a CLVM disk between them, let's call that VG "disk" > and then directly map each LUN (1,2,3,4,etc) to LV's named 1,2,3,4,... and > so on. > > That would essentially make both host1 and host2 identical iSCSI targets. > So I could hook up 30 servers to each LUN on each host1 and host2 (assuming > those block devices had a cluster aware filesystem on them). > > However, what I wan't to accomplish is true active/active MPIO utilizing > the dm driver to combine LUN 1 from both host1 and host2 as a single > /dev/dm-0 device in active/active mode. > > This would allow me to multipath across multiple fabrics, develop true high > availability and increase my throughput significantly. > > Any idea of an iscsi tgtd that supports this? As far as I can tell, none do > (that I can find). I know some proprietary vendors have this type of > functionality, which may or may not be using iSCSI code (but that's a whole > set of arguments for later..). > > Ultimately, my goal is this. > > I want to take my existing Ceph cluster, expose a handful of RBDs from it > to two iSCSI heads running C6 or RHEL6 or what have you, so I can use my > inexpensive storage built on Linux -- for my Windows 2008 machines. > > Thoughts? > > > Steven Crothers > steven.crothers at gmail.com > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >