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Re: [Linux-cluster] Starter Cluster / GFS



Jankowski, Chris wrote:

The point is that no matter what you'd do, your cluster cannot fix the network.
So, fencing nodes on network failure is the last thing you want to do. You loose
warm database caches, user sessions and incomplete transactions. Disk quorum times
out in 10 seconds or so. A typical network meltdown due to spanning tree recalculation
is 40 seconds.

I'd argue that if you regularly get outages of 40 seconds due to spanning tree rebuilds, you have bigger problems (such as too many machines on the same VLAN). And if you have that many nodes in a cluster (you do keep your cluster interfaces on a dedicated VLAN, right?), you are doing way better than what the claimed limits for RHCS are. :)

Gordan


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