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Old 7th October 2009, 23:22
paulkc paulkc is offline
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Default drbd and heartbeat over wan

I was reading the post listed at: http://how2forge.org/installing-and-...-and-heartbeat and was wondering if it it possible to set up something like this without the direct connection between the two nas machines. I have 2 networks connected via vpn and would like to set up a backup openfiler at a remote location and have the primary openfiler sync to it for backup purposes. Is this possible?
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Old 8th October 2009, 17:01
falko falko is offline
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The problem is that you need a virtual IP, and this doesn't work if both systems are in different subnets.
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Old 8th October 2009, 17:05
paulkc paulkc is offline
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So is there another method that might accomplish this same task? I am trying to avoid having to use a 3rd system to backup from one openfiler to another.
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Old 9th October 2009, 13:29
falko falko is offline
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Not that I know.
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Old 9th October 2009, 13:57
paulkc paulkc is offline
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Ok, well thanks for the reply anyway.
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Old 17th January 2010, 18:45
tundasrl tundasrl is offline
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Don't ask me how because i'm still learning but... DRBD has 2 way to replicate:
Synchronous and Asynchronous

Quote:
Synchronous mirroring (called protocol C in DRBD speak) is the right choice for HA clusters where you dare not lose a single transaction in case of the complete crash of the active (primary in DRBD speak) node.

Asynchronous mirroring is necessary to build mirrors over long distances, i.e., the interconnecting network's round trip time is higher than the write latency you can tolerate for your application. (Note: The amount of data the peer node may fall behind is limited by bandwidth-delay product and the TCP send buffer.)
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