I've been looking around for some ideas on how to create a nearly real-time mirrored configuration between independent storage systems. A good example would be 2 Thumpers. I'd like to get to a place where if I needed to take one offline I could do it without having to take an outage for replications to occur.
The ideas I've come up with this far aren't good ones. Everything from rsycn'ing (or zfs send) every 5 minutes from cron (assuming a single run could even run that quickly) to using port mirroring to split each incoming transaction to 2 systems. Software ideas, like writing an NFS intercepter that takes incoming transactions and then sends one to disk and another to the standby system, are fun to think about but definitely not practical. The NetApp style snapmirror method (ie: zfs send on a regular rotation) is only so exciting because any failover looses a good amount of data making it a good backup method but definitely not transparent. Has anyone rolled over a good way to do this? I'd love to have a dialog on the topic and see what ideas bubble up. benr. This message posted from opensolaris.org _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
