Comments on: FC to iSCSI failover (revival) http://www.hypervisor.fr/?p=3164 French Bare-Metal weblog Fri, 30 Jul 2021 14:16:54 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: NiTRo http://www.hypervisor.fr/?p=3164&cpage=1#comment-2295 NiTRo Thu, 29 Mar 2012 00:28:15 +0000 http://www.hypervisor.fr/?p=3164#comment-2295 ZFS/WAFL are file systems AND volume managers, that makes multi protocol support easyier. I don't know for sure if they're the only one to support FC/iSCSI for the same LUN but i know they're built to support this. ZFS/WAFL are file systems AND volume managers, that makes multi protocol support easyier. I don’t know for sure if they’re the only one to support FC/iSCSI for the same LUN but i know they’re built to support this.

]]> By: Don http://www.hypervisor.fr/?p=3164&cpage=1#comment-2294 Don Wed, 28 Mar 2012 11:12:41 +0000 http://www.hypervisor.fr/?p=3164#comment-2294 Thanks Nitro. I am still a bit confused. Are ZFS/WAFL file systems or storage processors? Why does using ZFS/WAFL enable to support multiple transport protocols? I thought it would be the service/storage processor that took care of paths? I thought a raw LUN presented to esx was formatted as a VMFS filesystem? Thanks Nitro.

I am still a bit confused. Are ZFS/WAFL file systems or storage processors?

Why does using ZFS/WAFL enable to support multiple transport protocols? I thought it would be the service/storage processor that took care of paths?

I thought a raw LUN presented to esx was formatted as a VMFS filesystem?

]]> By: NiTRo http://www.hypervisor.fr/?p=3164&cpage=1#comment-2293 NiTRo Wed, 28 Mar 2012 08:16:48 +0000 http://www.hypervisor.fr/?p=3164#comment-2293 I'm afraid only ZFS or WAFL are able to do that. You should try with nexenta CE I’m afraid only ZFS or WAFL are able to do that. You should try with nexenta CE

]]> By: Don http://www.hypervisor.fr/?p=3164&cpage=1#comment-2292 Don Wed, 28 Mar 2012 08:13:33 +0000 http://www.hypervisor.fr/?p=3164#comment-2292 I created my own storage server using Debian 6.0.4 Linux using: - SCST for FC target service - iscsitarget package for iscsi and writing to a software RAID5 device /dev/md0 I created my own storage server using Debian 6.0.4 Linux using:

- SCST for FC target service
- iscsitarget package for iscsi

and writing to a software RAID5 device /dev/md0

]]> By: NiTRo http://www.hypervisor.fr/?p=3164&cpage=1#comment-2288 NiTRo Fri, 23 Mar 2012 23:16:55 +0000 http://www.hypervisor.fr/?p=3164#comment-2288 i meant on the storage server side, and by the way what did you used as storage server ? i meant on the storage server side, and by the way what did you used as storage server ?

]]> By: Don http://www.hypervisor.fr/?p=3164&cpage=1#comment-2287 Don Fri, 23 Mar 2012 03:23:31 +0000 http://www.hypervisor.fr/?p=3164#comment-2287 Thanks for your reply Nitro. I tried both ESX 4.1 and ESX 5.0. How did you add FC and iSCSI to the same LUN? Steps I took: 1. Add storage -> finds both FC and iSCSI available with different IDs -> Choose to add FC LUN. 2. Add storage -> finds iSCSI available --> Choose iSCSI -> adds another LUN. Now I have to different datastores to the same LUN with one path each. Thanks for your reply Nitro. I tried both ESX 4.1 and ESX 5.0.

How did you add FC and iSCSI to the same LUN?

Steps I took:

1. Add storage -> finds both FC and iSCSI available with different IDs -> Choose to add FC LUN.
2. Add storage -> finds iSCSI available –> Choose iSCSI -> adds another LUN.

Now I have to different datastores to the same LUN with one path each.

]]> By: NiTRo http://www.hypervisor.fr/?p=3164&cpage=1#comment-2284 NiTRo Thu, 22 Mar 2012 06:55:09 +0000 http://www.hypervisor.fr/?p=3164#comment-2284 it was 4.1 U1, how did you test it ? it was 4.1 U1, how did you test it ?

]]> By: Don http://www.hypervisor.fr/?p=3164&cpage=1#comment-2283 Don Thu, 22 Mar 2012 05:26:40 +0000 http://www.hypervisor.fr/?p=3164#comment-2283 What ESX version did you use for this test? I tried ESXi 4.1u1 and 5.0 and vSphere will not recognise FC and iSCSI as the same LUN. What ESX version did you use for this test?

I tried ESXi 4.1u1 and 5.0 and vSphere will not recognise FC and iSCSI as the same LUN.

]]> By: NiTRo http://www.hypervisor.fr/?p=3164&cpage=1#comment-2063 NiTRo Mon, 18 Jul 2011 12:10:52 +0000 http://www.hypervisor.fr/?p=3164#comment-2063 Pour PP/VE ça doit être récent car j'avais testé ya un moment et c'était locké à EMC. je vais refaire un test avec le nouveau vib, merci ;) Pour PP/VE ça doit être récent car j’avais testé ya un moment et c’était locké à EMC. je vais refaire un test avec le nouveau vib, merci ;)

]]> By: PiroNet http://www.hypervisor.fr/?p=3164&cpage=1#comment-2062 PiroNet Mon, 18 Jul 2011 11:31:15 +0000 http://www.hypervisor.fr/?p=3164#comment-2062 PP/VE est storage agnostic... Mais fonctionne mieux sur un EMC :) Une version trial est dispo ici: https://community.emc.com/message/11590 Sinon trop bon le RR sur FC/iSCSI, j'adore :) PP/VE est storage agnostic… Mais fonctionne mieux sur un EMC :)
Une version trial est dispo ici: https://community.emc.com/message/11590

Sinon trop bon le RR sur FC/iSCSI, j’adore :)

]]> By: NiTRo http://www.hypervisor.fr/?p=3164&cpage=1#comment-2061 NiTRo Mon, 18 Jul 2011 10:49:05 +0000 http://www.hypervisor.fr/?p=3164#comment-2061 En RR ça fonctionne bien : http://hypervisor.free.fr/img/ZFS_RR.png Par contre avec PowerPath, impossible c'est réservé aux LUN EMC... En RR ça fonctionne bien : http://hypervisor.free.fr/img/ZFS_RR.png
Par contre avec PowerPath, impossible c’est réservé aux LUN EMC…

]]> By: PiroNet http://www.hypervisor.fr/?p=3164&cpage=1#comment-2060 PiroNet Mon, 18 Jul 2011 08:17:44 +0000 http://www.hypervisor.fr/?p=3164#comment-2060 Terrible!!! Je suppose que dans ton config le FC est en 4Gb et le iSCSI en 1Gb!? Ce qui expliquerqit que le failover en iSCSI resulte a 4x moins d'IOPS qu'en FC... Question, peux-tu faire du RR natif (VMW) ou EMC PP/VE sur le FC avec Nexenta? Et encore plus fou, en incluant le stack iSCSI :)) Terrible!!!

Je suppose que dans ton config le FC est en 4Gb et le iSCSI en 1Gb!?

Ce qui expliquerqit que le failover en iSCSI resulte a 4x moins d’IOPS qu’en FC…

Question, peux-tu faire du RR natif (VMW) ou EMC PP/VE sur le FC avec Nexenta? Et encore plus fou, en incluant le stack iSCSI :) )

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