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Transparent HA on two node active/passive cluster [message #38214] Sat, 28 November 2009 21:44 Go to next message
customer.joe@freemail.hu is currently offline  customer.joe@freemail.hu
Messages: 3
Registered: November 2009
Junior Member
Hi all!

Is this possible to implement similar or same functionality in OpenVZ?
http://dsg.cs.ubc.ca/remus/

The implementation details here:
http://dsg.cs.ubc.ca/remus/papers/remus-nsdi08.pdf

Regards
Re: Transparent HA on two node active/passive cluster [message #38215 is a reply to message #38214] Sun, 29 November 2009 08:30 Go to previous messageGo to next message
kir is currently offline  kir
Messages: 1645
Registered: August 2005
Location: Moscow, Russia
Senior Member

Please see http://wiki.openvz.org/HA_cluster_with_DRBD_and_Heartbeat

Kir Kolyshkin
http://static.openvz.org/userbars/openvz-developer.png
Re: Transparent HA on two node active/passive cluster [message #38216 is a reply to message #38215] Sun, 29 November 2009 12:00 Go to previous message
customer.joe@freemail.hu is currently offline  customer.joe@freemail.hu
Messages: 3
Registered: November 2009
Junior Member
Thank you, but I didn't know that this offers "equivalent/same" live replication features as remus patch do. I'll try this OpenVZ configuration.

For example I don't know that VPS memory synchronization how affected by the ext3 fs cache. With Remus, the VPS memory synchronization (and states, like checkpointing) is near real time (~forty times a second), asynchronous and synchronized with network output by buffering.

But if the OpenVZ+ext3+drdb can accomplish same/similar or better(?) replication, then OpenVZ is the best choice.

Also I can't find in this wiki that how will checkpointing do on the active node if that dead (e.g. power off), and what VPS state will wake up on the passive node in this scenario with OpenVZ.

So the conclusion is that I must invest some time and try it.

Thank you.
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