Dynamic files increase the risk that using third-party technology (rather than U2 Replication) will result in corrupt files on fail-over. This is because dynamic files increase the probability that a single logical write will result in multiple disk writes - 3rd party technology will not know the correct write boundaries.
Regards, Dan McGrath Managing Director, U2 Servers Lab Rocket Software 4600 South Ulster Street · Suite 1100 · Denver, CO 80237 · USA T: +1 720 475 8098 · E: [email protected] · W: u2.rocketsoftware.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ard956 Sent: Tuesday, September 03, 2013 7:55 PM To: U2 Users List Subject: Re: [U2] REPLICATING DATA Files are mostly dynamic and distributed files are used on the most active files, if that makes a difference. Sent from my iPad On Sep 3, 2013, at 6:48 PM, John Hester <[email protected]> wrote: > Daniel's post reminded me that I should probably qualify my original > post by adding that you have to take special precautions when using > 3rd party replication software with U2. Specifically, it's not safe > to have overflow in hashed files because the overflow pointer and > overflow data require two separate writes to disk. If a failover > occurs when only one of the two writes has been completed, you'll > likely end up with a corrupted file. I've eliminated this issue in > our environment by keeping all hashed files sized to have no overflow > and only using dynamic files for temporary report data. This probably > isn't feasible in a lot of environments. > > -John > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of John Hester > Sent: Tuesday, September 03, 2013 11:40 AM > To: U2 Users List > Subject: Re: [U2] REPLICATING DATA > > We've been using LifeKeeper from SIOS to replicate UV for around 10 > years. I think it's now been rebranded as "Protection Suite": > > http://us.sios.com/linux-high-availability-replication-enterprise/ > > It can run on Linux or Windows. We're running UV 10.2.7 on RH EL 5.1. > > -John > _______________________________________________ > U2-Users mailing list > [email protected] > http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users _______________________________________________ U2-Users mailing list [email protected] http://listserver.u2ug.org/mailman/listinfo/u2-users
