Shared storage is evil (in this context). Corrupt the storage, and you have
Now I am confused. We're talking about storage which can be used for
failover, aren't we? In which case we are talking about HA not DR.
That goes for all block-based replication products as well. This is
not acceptable risk. I keep looking for a non-block-based replication system
that allows seamless client failover, and can't find anything but NetApp
I don't know SnapMirror, so I may be mistaken, but I don't see how you can
have non-synchronous replication which can allow for seamless client
failover (in the general case). Technically this doesn't have to be block
based, but I've not seen anything which wasn't. Synchronous replication
pretty much precludes DR (again, I can think of theoretical ways around
this, but have never come across anything in practice).
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