Remus Project Brings Transparent High Availability To Xen

An anonymous reader writes "The Remus project has just been incorporated into the Xen hypervisor. Developed at the University of British Columbia, Remus provides a thin layer that continuously replicates a running virtual machine onto a second physical host. Remus requires no modifications to the OS or applications within the protected VM: on failure, Remus activates the replica on the second host, and the VM simply picks up where the original system died. Open TCP connections remain intact, and applications continue to run unaware of the failure. It's pretty fun to yank the plug out on your web server and see everything continue to tick along. This sort of HA has traditionally required either really expensive hardware, or very complex and invasive modifications to applications and OSes."

Comments

Re:state transfer

[Garridan]

Mountain dew spilled on top of the unit, for example.

FTFS:

Remus provides a thin layer that continuously replicates a running virtual machine onto a second physical host.

Wow! This software is *incredible* if mountain dew spilled on top of one machine is instantly replicated on the other machine! I'm gonna go read the source immediately, this has huge ramifications! In particular, if an officemate gets coffee and I also want coffee, only one of us needs to actually purchase a cup!

Re:Intact?

[martin-boundary]

Intact is one word

That was before someone gave Romulus a shovel!

Re:state transfer

[girlintraining]

Wow! This software is *incredible* if mountain dew spilled on top of one machine is instantly replicated on the other machine! I'm gonna go read the source immediately, this has huge ramifications! In particular, if an officemate gets coffee and I also want coffee, only one of us needs to actually purchase a cup!

I told them quantum computing was a bad idea, but nobody listened...

I told them quantum computing was a bad idea, but nobody listened...

I told them...