[OpenIndiana-discuss] ZFS High-Availability and Sync Replication

[Doug Hughes]

On 11/19/2012 9:39 PM, Edward Ned Harvey (openindiana) wrote:
>> From: Sašo Kiselkov [mailto:skiselkov.ml at gmail.com]
>>
>> I've been lately looking around the net for high-availability and sync
>> replication solutions for ZFS and came up pretty dry - seems like all
>> the jazz is going around on Linux with corosync/pacemaker and DRBD. I
>> found a couple of tools, such as AVS and OHAC, but these seem rather
>> unmaintained, so it got me wondering what others use for ZFS clustering,
>> HA and sync replication. Can somebody please point me in the right
>> direction?
> Despite my recent failure, I still think there must be a good solution mirroring an iscsi device with another iscsi device.  I've put this project on the back burner, but I'm still optimistic that there's a simple explainable and repeatable problem causing the failure I experienced.  (And avoidable.)
>
Well, to me, the most obvious is use another box with ZFS to mirror the 
ISCSI devices on ZFS. I'm in the process of doing this myself with some 
stuff. 2 head nodes and 2 storage nodes. The storage nodes are targets 
and the head nodes are initators. You get performance and reliability, 
and failover between head nodes is relatively easy with zpool import.