Restarting the MemcacheD Cluster

Philip Neustrom philipn at
Sat Apr 15 05:47:51 UTC 2006

Why would a rolling restart cause cache corruption?  You mentioned
that you had cache corruption to begin with (in your application?) 
Maybe this is why you see it on a rolling restart?

 --Philip Neustrom

On 4/14/06, timeless <time at> wrote:
> Suppose somehow we've decided there's "bad data" in the MemcacheD
> cluster, and don't really know where it is. It seems the safest course
> of action would be to flush_all across the cluster.
> Here's what I came up with for doing it:
> for i in 1 2 3 4 5 ; do echo "flush_all" | netcat -q 1 memcached.$i
> 11211 ; sleep 15 ; done
> Does this seem reasonable to everyone? Is there a more elegent (or
> proper) way of doing this? (Doing a rolling restart of the memcached
> daemons across my cluster appears to be the WRONG way to do it, and
> seems it would cause cache corruption).
> --
> timeless

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