Shibboleth SP clustering using shared database

[Cantor, Scott]

> Besides RAC, we also tried memcached as StorageService, similar results:
> when one of memcached is offline, SP would just error out, doesn't seem to
> skip the bad one and try the other memcached.

That would be entirely up to the memcache library.

I already verified that the code doesn't care if it can't update the timestamp, so it's generally irrelevant for it to fail in that spot as long as it doesn't hang.

It is also, almost invariably, pointless to cluster the SP.

-- Scott