RE: iscsi through linux software bridge?

2009-10-06 Thread netz-haut - stephan seitz
Hi there, I'ld recommend not to export LUNs directly to domU's. We did this on a few dom0 with dedicated iSCSI NICs. Running about 40-60 domUs concurrently results in flaky iSCSI traffic and random loss of iSCSI sessions. We're now using multipathed CLVM LV's without any problem. Cheers, Ste

RE: iscsi through linux software bridge?

2009-10-08 Thread netz-haut - stephan seitz
s are used for > physical access to the domU and which ones are actually being mounted > on the dom0 (for Oracle VM, these are mounted under /OVS/) > > Thanks, > Joe > > > On Oct 6, 2009, at 11:41 AM, netz-haut - stephan seitz wrote: > > > > > Hi there, &g

RE: Reboot hangs on failing multipath devices

2010-03-26 Thread netz-haut - stephan seitz
This is a reported bug of the device-mapper on debian. There's a patch at debians bugtracker available, but as far as I remember, it has been refused by upstream developers. We're also running open-iscsi/dm-multipath/lvm/clvm stack on virtualization Hosts. Due to this behavior one big point is to

RE: What happens if an iSCSI target resets.

2010-03-26 Thread netz-haut - stephan seitz
We're running a 2 node DRBD active/passive target. During pre-production tests I've found, that kicking the primary immediately off by heartbeat/sys_req or STONITH works much better than shutdown. I've configured dm-multipath on top of bonding devices (mode 0) utilizing two switches. The bonding

Re: iSCSI and multipath performance issue

2011-09-23 Thread netz-haut - stephan seitz
Am Donnerstag, den 15.09.2011, 21:23 +0100 schrieb --[ UxBoD ]--: Hello all, Hi, we are about to configure a new storage system that utilizes the Nexenta OS with sparsely allocated ZVOLs. We wish to present 4TB of storage to a Linux system that has four NICs ava

Re: Xen + iscsi ifaces for 2 sessions in dom0 + iscsi ifaces inside vm's

2011-10-22 Thread netz-haut - stephan seitz
Hi, i've tried bridged iscsi traffic with xen domU's, and got succesful logins to ietd and scst portals. You need to disable at least tx (not sure about rx) checksums on the physical NIC as well as on the vif's. I'm currently not sure how and if this can be done for the vif's from inside the do