Now that you have opened the door, I will say that I believe that the Reality solution is probably the best that is available from any vendor in the MV space that I have seen ... quite awesome.
Cache also has some strong options in this area, BUT I think there is a non-trivial amount of "plumbing" that needs to be put in place (and not sure if this has been fully tested with MV implementation .... I know it shouldn't make a difference, but .... .... and now, back to your regularly scheduled U2 discussions (sorry) Ross Ferris Stamina Software Visage > Better by Design! >-----Original Message----- >From: [email protected] [mailto:u2-users- >[email protected]] On Behalf Of Baker Hughes >Sent: Tuesday, 27 July 2010 2:26 AM >To: 'U2 Users List' >Subject: Re: [U2] 24 X 7 MV systems > >Jeff, > >Thank you for giving your experience with HA AIX and a cluster. We are >also doing the HA but not clustering. The couple minutes time lag you >mention and the possibility of broken transactions make one wonder if >it's worth going that distance. > >I didn't know Stratus was still out there so thanks for that. What >about Sequoia? That was also a very coveted system in the 911 offices >back in the day. > >Awesome story about the Sequoia still tooling right along while the disk >is on fire. So did the system switch itself over to 'B' or did y'all do >it, when? > >I can't match that one, but even with Reality 7 (sorry to mention this >on the U2 list) we could throw a manual switch (took me about 30 seconds >to get from my office to the switch in the computer room) and when the >dispatchers logged in, there were their sessions with screens looking >identical to system A. That's why I gotta believe we can do better, 20 >years later. > >Thank you. >-Baker > > > >-----Original Message----- >From: [email protected] [mailto:u2-users- >[email protected]] On Behalf Of Jeff Schasny >Sent: Monday, July 26, 2010 10:24 AM >To: U2 Users List >Subject: Re: [U2] 24 X 7 MV systems > >We are running an IBM high availability cluster of AIX machines which do >auto fail-over. There is a couple minutes of time lag involved and there >can be broken transactions since the switchover is OS level and not >applications based so this is probably not a good solution for you since >it sounds like you are looking for a truly fault tolerant solution. >Stratus is still out there and probably a good choice for your needs. I >know they have at least one series of boxes which run Red Hat and >therefore are U2 compatible. > >I worked on a fault tolerant Sequoia system running Pick OA many years >ago supporting an alarm monitoring application. Amazing machines. True >Story: The operations manager gets a call from the computer operator who >tells him "Theres smoke coming out of one of the disk drawers on the >Sequoia 'A' system" (we had a second redundant Sequoia 'B' system as >well). A couple quick phone calls later 5 of us are huddled together in >the computer room on various phones with Sequoia after hitting the raid >disk drawer in question with a fire extinguisher, trying to decide if we >should switch over to the backup system, when out of the little glass >cubicle where the operators live comes the operator on duty. He walks up >to the smoking system, pulls off a spinning magnetic tape, and mounts >the next reel of a file restore he's doing for someone. We all look at >each other and laugh because the system is still running along just fine >while on fire. > >Baker Hughes wrote: >> 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 >> [email protected] >> http://listserver.u2ug.org/mailman/listinfo/u2-users >> >> > >-- >----------------------------------------------------------------------- - >Jeff Schasny - Denver, Co, USA >jschasny at gmail dot com >----------------------------------------------------------------------- - >_______________________________________________ >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
