We are using Double-Take to replicate. --- On Wed, 12/9/09, BraDav <broadri...@comcast.net> wrote:
> From: BraDav <broadri...@comcast.net> > Subject: Re: [U2] Unidata 6.1 Replication > To: "U2 Users List" <u2-users@listserver.u2ug.org> > Date: Wednesday, December 9, 2009, 8:33 AM > Kevin, > > I would not use replication for U2 for 6x. I was > given the mandate to use then IBM replication at a company I > used to work for, and it didn't work. It wasn't on problem, > but a whole hosts of problem. I set up two test boxes > four different times and tested it. The 4th time I had > 30 people from then IT staff (I was part of the staff then) > hammer on it. Then we went live. It worked for 4 days > then crashed the whole system. Then it worked for a > few hours. Then, it kept crashing (hanging the > servers). We had to pull it out. We were on > Unidata, but it's the same code base. > > I can only say that if you want to go ahead with it, find > someone who's using it successfully, and find out what > environment they're in, version, ect. It's based on > Unix and has different issues on different O/Ss. But, > personally, I'd try RFS first, or write your own. > That's what we ended up doing. And it worked. We > used triggers and hammered the system 24/7. There were some > issues, but we worked them all out, and we're able to > process millions of transactions per day. What we > ended up doing is finding all the weak spots in Unidata and > avoiding them. The biggest weak spot was locks. > The system couldn't hanldle the million+ locks per > day. I went to double buffering, avoiding locks (an > old GUI technique!). Also, I had to convert types of > records to hex, and the UD hex conversion is > slow. It's amazing what works in UD and > scales, and what doesn't. To write one's own takes > time and is expensive. I think that using mirrored > drives is better!!! RFS??? > > Brad > > > ----- Original Message ----- From: "Kevin King" <precisonl...@gmail.com> > To: "U2 Users List" <u2-users@listserver.u2ug.org> > Sent: Tuesday, December 08, 2009 12:22 PM > Subject: [U2] Unidata 6.1 Replication > > > > Is replication solid and functional in Unidata > 6,1? Anyone using it with > > roaring success? > > > > -Kevin > > http://www.PrecisOnline.com > > _______________________________________________ > > U2-Users mailing list > > U2-Users@listserver.u2ug.org > > http://listserver.u2ug.org/mailman/listinfo/u2-users > > _______________________________________________ > U2-Users mailing list > U2-Users@listserver.u2ug.org > http://listserver.u2ug.org/mailman/listinfo/u2-users > _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
