On Wed, Jun 13, 2012 at 10:40 AM, Gregory Farnum <[email protected]> wrote:
> 2) Client fencing. See http://tracker.newdream.net/issues/2531. There
> is an existing "blacklist" functionality in the OSDs/OSDMap, where you

So I just managed to put into words another reason I like the key
rotation more than blacklisting: blacklisting fails open, key rotation
fails closed. That is, say something restart the client process, and
it gets a new pid: now it has a new unique id, and the old blacklist
entry no longer applies! Where as with key rotation, if you don't get
a new secret, you have snowballs chance in hell of getting it going
again.


The other reason that came up is, blacklisting is time-expiring (I
hear 24 hours currently), and I have absolutely no faith that
malfunctioning clients will actually always get manual intervention by
an admin within that time interval (or any other reasonable time
interval, either).
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