On 7/23/14, 12:57 PM, Miles Fidelman via illumos-discuss wrote: > Hi Folks, > > Is there anything like DRBD or HAST for illumos? Seems like ZFS + DRBD > would be really sweet for high availability clusters - but so far, none > of the pieces are together in one place. > > Trying to get to a small cluster w/ Xen+ZFS+HA > > ZFS: illumos, FreeBSD, not really stable anywhere else > Replication: DRBD for Linux, HAST for BSD*, ??? for illumos > Xen: Linux, NetBSD > > Sigh...
AFAIK there's no native remote block-level synchronous replication solution for Illumos. For async replication, incremental snapshots are the way to go. Just transfer an incremental snapshot every 30-60s. They're relatively inexpensive and robust, so pool corruption doesn't immediately get propagated to the replication pair. For sync replication I personally use SAS fabrics and mirrored pools (conceptually, this is essentially what sync replication does, only over a special protocol). Passive SAS cabling can run 3m (so rack-to-rack is possible) and 20m with active cabling (room-to-room even). If longer links are needed I'd opt for iSCSI. At Nexenta we've got some early stuff in ZFS that allows us to prioritize reads & writes to mirror sides, but it's still pretty new and not battle proven. I know these are conceptually not exactly the same as DRBD or HAST, but functionally it's identical. Cheers, -- Saso ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
