Multiple LiveCache Instances Sharing the SAPDB software

[Former Member]

Hello

We have two LiveCache Instances sharing the same set of executables for the SAPDB software and we are trying to apply a patch for DBMServer 7.5.0 Build 035 to get to Build 044 for SCM 4.1

I got the following error when I try to use SDBUPD

beginning to check sap db instances

existing instances:

0: LCT "/sapdb/LCT/db" 7.5.0.31

1: LCX "/sapdb/LCT/db" 7.5.0.31

2: none

please enter instance id: 1

no instance update supported - there are more than one instance based on instal"

SAP liveCache instance update exited abnormally at Fr, Aug 01, 2008 at 21:25:53

So I used SDBINST with APO LiveCache as the profile to install the software to /sapdb/LCT/db. Then I executed load_systab and load_lcapps using dbmcli for LCX. I would like to know if I am missing any of the steps. Please advise.

Thanks

Jay

[lbreddemann]

Hi Jay,

sharing one dependent path for two liveCache instances is not supported - exactly due to the tight coupling of SCM and liveCache and the issues resulting from it when patching on of the two liveCaches.

To 'move' over the LCT to the newly installed dependent path you've to unregister the instance first (aka db_drop withoutfiles) and re-register it as a new instance.

Make sure you've a backup before you do this!

1. bring liveCache LCT offline
2. dbmcli -U c db_drop withoutfiles
3. dbmcli u2013s u2013R <new_dependent_path> db_create LCT control,<password>
4. bring liveCache LCT online again

After that the LCT liveCache runs in its own dependent path and you can upgrade the two instances separately.

Regard,

Lars