[DRBD-user] DRBD over a WAN, alternatives?

[Nate Carlson]

Hey all,

I'm happily using DRBD on a local cluster of systems, with both nodes 
writable and ocfs2 as the filesystem. It works great.

I'm looking at making this cluster geographically diverse, with each end 
having a 100mbit link to the internet. A few base questions:

1) Has anyone deployed DRBD in this scenario? How did it work for you?
2) Is DRBD "smart" at all about what it transfers over the WAN (I 
essentially pay per-byte), or does it just transmit block changes as they 
are made?

Also, is there any way to scale DRBD out to 3+ nodes?

I'm also wondering if anyone has experience (or even names) of other 
products that can do replication to 2+ nodes, have it writable on both 
sides, etc. I'm familiar with PeerFS and Constasnt Replicator (owned by 
some other compoany now), but would love to hear any experiences or any 
other apps that will do this.

Thanks!

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| nate carlson | natecars at natecarlson.com | http://www.natecarlson.com |
|       depriving some poor village of its idiot since 1981            |
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