HP Integrity Virtual Machines Online Migration with IBM Informix Dynamic Server 11.50

HDR Scenario 1 – migrate Primary (Requires the Standby Server)

Set up an HDR (High Availability Data Replication) pair with the Primary running on HPVM1 on

Host A and the Secondary running on the Standby Server. Set up the connection manager such

that the Secondary becomes the Primary when the Primary fails. Initiate some Client connections

doing DDL/DML against IDS. While the clients are connected and transactions are going on,

migrate HPVM1 to Host B. Make sure that the Secondary did not take over as the Primary and

that the HDR pair was not affected by the migration (that is IDS running on HPVM1 on Host B is

the Primary and the IDS running on the Standby Server is still the Secondary). Migrate HPVM1

back to Host A and validate that IDS and Client connections are fine.

HDR Scenario 2 – migrate Secondary (Requires the Standby Server)

Set up an HDR pair with the Primary running on the Standby Server and the Secondary running

on HPVM1 on Host A. Initiate some Client connections doing DDL/DML against IDS. Migrate

HPVM1 on Host A (the Secondary) to Host B. Make sure that the HDR pair is not affected by

this (that is the Primary and the Secondary, which is now running on HPVM1 on Host B, are still

operational). Migrate HPVM1 back to Host A and validate that IDS and Client connections

are fine.

MACH 11 (Multi-Node Active Clusters for High-availability) Scenario (Requires the Standby Server)

Set up a Primary and SDS (Shared Disk Secondary) instance – Primary running on HPVM1 on

Host A and SDS running on the Standby Server. Set up the connection manager such that the

Secondary becomes the Primary when the Primary fails. Initiate some Client connections doing

DDL/DML against IDS. While the clients are connected and transactions are going on, migrate

HPVM1 to Host B. Make sure that SDS did not take over as Primary and the IDS instances are not

affected by the migration (that is IDS running on HPVM1 on Host B is the new Primary and IDS

running on the Standby Server is still the SDS instance). Migrate HPVM1 back to Host A and

validate that IDS and Client connections are fine

Result: Migrating VM (hpvmids1) running IDS 11.50 (with Clients connected to it) Online from Host A

to Host B did not affect IDS, and the Client connections were not dropped during and after the

migration. All the test scenarios were successful.

For detailed instructions on installation and configuration of HDR and MACH11 please look up

Administering/Replication/Managing High Availability in the infocenter.

http://publib.boulder.ibm.com/infocenter/idshelp/v115/index.jsp

Summary

Online VM Migration is now available for use with Integrity Virtual Machines v4.1. This enables a

running VM, its guest OS and its applications to be moved to a different VM Host without service

interruption. Service remains active without an OS reboot or application restart. All I/O connections

to storage and networks remain active throughout the migration.

All the test scenarios listed were validated with IDS 11.50.FC5 . IDS and the Clients connected to it

continued to work fine, during and after the migration for all the test scenarios.