Hey Stranger, The best way you'll get there is with a transaction/request based redundancy setup. Does U2 have anything that isn't trigger related? Even a block-level DRDB config won't help with databases since transactions in memory aren't committed to disk promptly enough for the replicator to get all of the new data pieces as the fault happens. I've been looking for a remote hosted failover solution myself (not for U2). A truly fault tolerant setup requires that the incoming requests be replicated to multiple machines before anything happens inside. You might think of the user app as a web service consumer that makes requests to a proxy. That proxy mux's the requests to multiple machines, compares all of the responses and then passes back the response of one machine based on failover priority. If one of the responses aren't the same then an error is sent to the admin. Unfortunately, this spits in the eye of MV which is designed to be a stand-alone central data store. Maybe you can do it with your own TCP packets, but if you don't use an encrypted media you may get into security trouble. Web services are horribly bloated, but the security layer is already in there. You should bug Ross Ferris and pick his brain about his DRS product versus other options for U2. DRS supposedly uses a small amount of bandwidth but it isn't encrypted AFAIK.
Regards, ---------------------------------------- Glen Batchelor IT Director/CIO/CTO All-Spec Industries phone: (910) 332-0424 fax: (910) 763-5664 E-mail: webmas...@all-spec.com Web: http://www.all-spec.com Blog: http://blog.all-spec.com ---------------------------------------- > -----Original Message----- > From: u2-users-boun...@listserver.u2ug.org [mailto:u2-users- > boun...@listserver.u2ug.org] On Behalf Of Baker Hughes > Sent: Monday, July 26, 2010 9:38 AM > To: 'U2 Users List' > Subject: [U2] 24 X 7 MV systems > > Hey y'all, > > I'm interested in hearing from folks who are currently on, or have worked > with fault tolerant MV systems. > > We'd like to host our Business Layer on the MV system and serve It to our > e-commerce portals, instead of re-coding our business rules first in > Basic, then in .Net In order to get there though we must meet the > primary business requirement of zero downtime (not even 2 minutes to > manually switch). We're not talking about different levels of Raid - it's > assumed the storage array is up and available. If the MV system has a > hiccup of more than a few seconds it needs to hot failover to a backup > twin sister. > > Is anyone doing this or something close to it? When I worked in public > safety, Stratus sold such an automatic hot failover. I'm sure the EnRoute > folks are doing something like this still. Maybe Nick G. or Margaret M. > is listening in today. > > Thanks, > -Baker > > > > ________________________________ > This communication, its contents and any file attachments transmitted with > it are intended solely for the addressee(s) and may contain confidential > proprietary information. > Access by any other party without the express written permission of the > sender is STRICTLY PROHIBITED. > If you have received this communication in error you may not copy, > distribute or use the contents, attachments or information in any way. > Please destroy it and contact the sender. > _______________________________________________ > 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
