Re: new toys - new problem
"Neil Truby" <neil.truby@ardenta.com> wrote in message news:<2i4f30Feuia9U1@uni-berlin.de>... > "mad_villan" <bryan.purkis@planetfootball.com> wrote in message > news:872d93d8.0406010602.750da30@posting.google.com... > > we have just invested heavily in 2x E4900 boxes running solaris 9 with > > emc san storage. Currently we run ids7.31uc7 with solaris7 using > > veritas clustering, netbackup and vm. > > We want to migrate to 64 bit ids to take advantage of the extra > > allocatable memory etc. I have cobbled together a migration plan but > > would like to run it by all you > > boffins to see if i have missed anything obvious, or whether there is > > a better (and ultra safe) way of approaching the task. I intend to: > > > > 1. install ids7.31uc7 on new architecture - ensuring dbspaces are > > identical > > 2. configure the new box to run as a HDR secondary > > 3. stop all applications > > 4. break the hdr pair and take the current live system offline > > 5. change the mode of the new boxes to primary > > 6. upgrade the primary to version to 7.31fd? (64 bit) > > 7 repoint the apps > > 8. fire it up and pray. > > > > I would like to do this without donwtime at all but cannot afford to > > take ANY risks. All comments (however sarcastic:-) are gratefully > > received. > > I'm a bit lost as to the significance of TWO new boxes. Is one a test box: > thus your question is just how to get ONE of them up-and-running as the live > server? > Personally, I'd use a consultancy expert in IDS, EMC and mission-critical > systems who's got the medals and done it before. Like mine. :-) > However, going it alone, a couple of alternatives suggest themselves: > > 1. Using Timefinder to take a BCV copy of your current live disks (are they > on the same Symmetrix: if not go to Option 2?), making these available to > the new box, doing the upgrade on the new box, when you're satisfied moving > the now-live BCVs to a different Timefinder group then restoring to > Primaries and running your live service off this. Benefits: Easy back-out. > Drawbacks: lots of Timefinder work, plus a less-than-ideal time when you're > running a live service off BCVs (but you can OS mirror them). > > 2. Using Informix mirroring to make duplicates of your primary chunks onto > EMC disk. Shut down Informix. Make the mirrors available to the new box > and point your IDS chunk links to them AS IF THEY WERE PRIMARIES. Up comes > IDS but of course it bitches about the missing mirrors. Create new mirror > chunks on the EMC disk, mark the chunks as "up", mirroring will be > re-established. Drop the mirrors. Benefits: We've done it a million times; > it's so beautifully elegant it makes me cry; downtime of a couple of minutes > if you plan it properly; instant backout Drawbacks: None. > > I haven't commented on your plan because I rarely use HDR these days - > nearly always do mirroring at the SAN or failing that OS level. It seems to > be more complex and risky than option 2 above. > > cheers Thanks for your input Neil, Unfortunately our budget doesn't stretch to your level of expertise ;-) The two new boxes are actually a new active/active cluster. Your option 2 sounds very attractive - just scares the hell out of me !!! I will run away and do some research.