This I will have to look into. Right now I'm deciding if I want to setup the partitions in an LVM or not.
Thanks > -----Original Message----- > From: [email protected] [mailto:u2-users- > [email protected]] On Behalf Of Robert Porter > Sent: Wednesday, April 28, 2010 2:09 PM > To: U2 Users List > Subject: Re: [U2] Universe and stripped drives > > Many 'nix systems not longer require breaking mirrors for backups... We > haven't broken a mirror for backups since the late 90s. HP-UX and > Linux for example. A MUCH better option is using logical volumes (and > yes, you can still mirror and stripe) as well and use filesystem > snapshots to backup. A snapshot takes what the filesystem looks like at > the moment of creation and mounts it to another mount point. All writes > occur to an alternate disk set, which any active application sees > under the original mount point. When undoing the snapshot, all the > writes are applied in order to the filesystem. The process of creating > usually takes seconds, and if the users see it at all, it will appear > as a slight pause. Undoing it depends on the volume of writes pending, > usually seconds to minutes, but regardless will likely be MUCH less > than rebuilding the mirror. And instead of needing a while 3rd set of > drives, you only need enough space to hold the pending writes for the > length of the bac > kup. And they can live on the same set of drives of separate drives if > you prefer. > > > > Robert F. Porter, MCSE, CCNA, ZCE > Lead Sr. Programmer / Analyst > Laboratory Information Services > Ochsner Health System > _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users
