Near Zero Downtime Upgrade

[Former Member]

Dear  All,

We are planning to upgrade the SAP system from ECC6.0 to EHP7 in our landscape. In the test system the totall downtime was around 4 hours. Could  anyone please share the strategy for Near Zero Downtime Upgrade and will it make any difference in my total downtime of the upgrade.

Please advice.

Warm Regards,

Sudhakar G

[former_member188883 · Accepted solution]

Hi Sudhakar,

4 hours of business downtime during upgrade should be an acceptable downtime unless the customer needs to reduce to down to < 1 hr.

In such a case NZDT solution from SAP should be useful. I share below some docu links for NZDT solution from SAP for your understanding.

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/b0bcdae4-a5f0-2d10-ae89-b5512d4aa...

Near-Zero Downtime Maintenance for SAP Business... | SCN

Hope this helps.

Regards,

Deepak Kori

[Reagan]

4 hrs for the downtime is pretty decent.

For the production system upgrade I would get the hardware resources (CPU and RAM) extended and make more use of the tp/R3trans parallelism.

Regards

RB

[deeraj_shetty]

Hi Sudhakar Govindaraj,

I assume your test/mock system was refreshed with PRD data before upgrade. If that is the case then the downtime achieved in Mock and PRD will be similar or even less(better hardware in PRD).

But nevertheless you can look into below parameter which will help in fine tuning/reducing downtime even further:

SAP Notes 1127194 and 1616401

TABIM_UPG phase gets executed during downtime which uses tp/R3trans parallelism.

http://scn.sap.com/thread/1743511

'You can freely increase the number up to 8 (maximum allowed). '

The TABIMUPG.TPP is created after the phase start, so we have to start it, cancel it, then edit TPP and then resume the phase - not a very clean process.

Also look into "Adaptation of Parameters" in SUM guide, which provides sufficient details.

Hope this information will be helpful!!!

Regards,

Deeraj Shetty

[Sriram2009]

Hi Sudhakar,

You can perform from production system to test environment (Either system copy or clone the production to private environment)and then perform the upgrade task to ECC6 EHP7 by using SUM tool,  calculate the over all time(Tech  + Business Down time). this will give you complete overview of the downtime required in production environment.

        NZDT is service provided by SAP exclusively as paid service. Indeed it can bring downtime as much as minimum level possible.

Regards

Ram