There are quite a few ways to get there, depending on facilities. 1) If you have fiber connecting the sites, then simply mirror the drives, or, if using an array, mirror two arrays using built-in operating system functions.
2) You can do mirroring at the volume level using a number of third party products, such as Veritas Volume Replicator. 3) You can use rsync with a cron job. It is really efficient as it only sends deltas. 4) You can use the IBM U2 publish/subscribe facilities. 5) We have been implementing hot backup servers using the DBMS (Prime INFORMATION, PI/open, and UniVerse) using triggers to perform asynchronous updates for about 20 years now, keeping the data up to date within a few seconds. It was really efficient in PI/open, but requires a lot of horsepower in UniVerse due to the trigger implementation in UniVerse. Regarding options 4 and 5, I don't recall the particulars of the licensing, but in theory you could have a two user U2 license on the backup site, and switch to a cold backup of the primary license on the backup system if you ever need to use it. From what I remember, cold backup licenses are not chargeable. I'd have a conversation with IBM about it. Best regards, Henry Henry P. Unger Hitech Systems, Inc. http://www.hitech.com -----Original Message----- From: owner-u2-us...@listserver.u2ug.org [mailto:owner-u2-us...@listserver.u2ug.org] On Behalf Of Jeff Powell Sent: Wednesday, March 18, 2009 3:07 PM To: u2-users@listserver.u2ug.org Subject: [U2] Does anybody have a hot backup server? I am trying to put together a backup strategy that involves keeping a standby server within two data hours of the primary. The idea is to be able to have users log into the backup server and keep the business running in the event of a crash. I'd like to hear what solutions others have found for this. I've been trying to contact IBM for the last 6 months but they haven't answered and my ERP vendor doesn't know how to do this. Any ideas are appreciated. TIA ------- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
