Hello everyone, We're using Xen for about a year in my organization and I want to make profit from summer to improve our infrastructure. First step : plan a full recovery disaster procedure. It's not only related to Xen (only a few actually) so I've allowed myself to post on both Xen and Linux cluster lists. My infrastructure is built as followed : - One software SAN built with Openfiler (http://openfiler.com) : big disks, RAID 5E, redundancy on power supply, network, cpu and RAM. - N Xen Dom0 (actually 3) - The same iSCSI volume is mounted on each Dom0 and we're using CLVM on it. A PV equals a DomU disk. It works pretty well and now I would like to rebuilt my SAN as quickly as possible in case of problem (big hardware failure on the SAN). Here how all these stuffs work together : |---------Openfiler------| |---------Dom0---------| PV -> VG -> LV -> iSCSI -> network -> PV -> VG -> LV->Xen VDB PV : physical volume VG : volume group LV : logical volume -------------------------------------------------------------- - We use the LVM layer (DomO side) on top of another LVM layer (SAN side) and performance are good until now. Do you know some caveats about this usage? Is there's any reason for me to switch to a network aware filesystem? - Can I dd a snapshot of the iSCSI volume on the Openfiler box, send it to a tape driver and expect a dd back to a identical LV to work? - Same question if 2 or more LVs on the Openfiler box are aggregated together with CLVM (and though iSCSI) on the Dom0 side. Thanks Regards -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
