New thread, the previous was about kernel-level clustering, not layered software.
> On Dec 23, 2014, at 2:15 PM, Miles Fidelman via illumos-discuss > <[email protected]> wrote: > > It really is a pain. HA is hard. DR is hard. HA + DR is hard. > > In the Linux world, Xen or KVM + DRBD + Pacemaker + CRM gives you a > relatively painless HA cluster. This is block-level replication. > In the BSD world, there's HAST + CARP get you pretty far along the same path. Also block-level replication. > But there's nothing equivalent in the illumos world (Xen is pretty thin too). The illumos equivalent for block-level replication is AVS. This works ok for small systems. Nexenta even productized it under the moniker "Simple HA" Unfortunately it doesn't work well for systems in the TB+ range due to the architectural issues of moving large amounts of data and the speed of light. Few illumos vendors work on small systems and even Nexenta killed "Simple HA" Today, most vendors do something other than block-level replication for large scale HA & DR. Most people use dataset replication or application-level redundancy in the illumos world. There are commercially-supported, general-purpose clustering solutions, such as RSF-1. If you want to roll your own, I'd suggest pacemaker/heartbeat and znapzend as good open-source starting points. > > Kind of a large gap when it comes to using illumos in any kind of production > environment. I don't see a large gap in capabilities. Many thousands of illumos-based systems are in production with HA and DR. -- richard ------------------------------------------- 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
