> -----Original Message----- > From: owner-u2-us...@listserver.u2ug.org > [mailto:owner-u2-us...@listserver.u2ug.org] On Behalf Of Dan > Fitzgerald > Sent: Wednesday, March 18, 2009 7:59 PM > To: u2-users@listserver.u2ug.org > Subject: RE: [U2] Does anybody have a hot backup server? > > I'd be worried about a particular vulnerability in this scenario. > > If the system goes down while you are updating overflow or > oversized data > frames, you could get file corruption. A single U2 logical > write can take > multiple os writes, and at any given moment on a busy system, > you probably > will have this condition. You can minimize this risk by > minimizing overflow, > but it's probably impossible to eliminate it. > > Outside of uv replication, I don't think that there's a > working solution to > this "in-flight transaction" problem. With Unidata, RFS > handles it nicely.
You're right. Stephen O'Neal from IBM also brought that issue to my attention. Fortunately all of our important files are hashed and oversized to the point of fairly small overflow, but we're not 100% protected against file breakage in a failover. -John ------- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
