Transparent failover and restore?
Kevin A. Burton
burton at newsmonster.org
Sun Dec 19 17:30:06 PST 2004
Greg Whalin wrote:
> Though, how often do you see motherboards and memory fail on running
> machines. Not that often in my experience.
Very often in my experience.. the more commodity servers means the more
components that can fail. Murphy is a harsh mistress...
At any point in time any component could fail and the cluster should not
> Given you don't really need a drive in a memcached server, seems much
> less likely that you will see hardware failure in a memcached server
> compared to the average. In all, it seems pretty unlikely that a
> memcache machine will fail, and given the cheap cost, one can build a
> pretty large cluster limiting the total percentage of cache lost if
> one of these servers does fail.
Accidents happen. We had one of our admins hit the power switch to the
bottom 1/2 of one of our racks. I want my software smart enough to
handle and recover from any problem. Makes my job a lot easier ;)
Read the Google cluster architecture. Machines fail and they take their
time replacing them.
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