hpux 10.2 --> 11iv2 migration

[Paul Senior_1]

We are looking at migrating our production system from an hpux 10.2 system running on an alk460+HASS array onto a clustered HP Integrity RX2620 setup using DAS (direct attatched storage) rather than a SAN, and running hpux 11iv2. Serviceguard would be used for the clustering.
Apart from having to recompile for the 32bit-->64bit transition, what other factors/complications are involved in such a migration?

[Steven E. Protter]

Shalom,

There are a lot of potential issues that could come up.

Serviceguard will not be a big factor. You will have to totally recconfigure your cluster, cmquerycl/cmcheckconf/cmapplyconf etc.

If your application uses a back end database, like oracle the data wil need to be converted from 32 to 64 bit.

More detail would be helpful to provide you specfic issues.

SEP

[Jaime Bolanos Rojas.]

Paul,

Besides the software part, the thing that concerns a lot too, is the hardware compatibility.
If you have not done so, I would call the HP hardware team and make sure the the hardware configuration that you are going to run is compatible with that OS, that you got all the drivers, latest patches for it, latest firmware.

Also this document is nice to read so you can get used to the different things in 11iv2.

http://docs.hp.com/en/5991-2710/ch03s06.html

Regards,

Jaime.

[Paul Senior_1]

we plan to run hpux 11iv2 with Ingres r3/2006 RDBMS with a CISAM/DISAM based application

[Steven E. Protter]

Shalom,

Make sure Ingress is certified on the new OS and the system is properly patched.

Get a data migration process from Ingress and follow it precisely with good backups along the way.

Do not even try this setup if its not supported by the Ingress folks.

SEP

[OldSchool]

Paul,

Earlier versions of Ingres II (2.0,and maybe 2.5) had issues with threads on HP-UX. These may have been resolved by now. You might want to check in the comp.databases.ingres group here:

http://groups.google.com/group/comp.databases.ingres

Lots of ingres support folk hang out there. BTW: I was able to run in posix-threads mode on 11.0 / Ingres II 2.0, but it took some tuning of the cp intervals and (?) in cdb to get it stable. As I recall, the alternative was the old iislaves (internal threads?) which I ran for a while, but performance was not up to par.

[rick jones]

In and of itself, a migration from 10.20 to 11iv2 does _not_ require migrating from 32-bit to 64-bit. HP-UX 11iv2 provides support for native 32-bit binaries - either PA-RISC if you are on an HP 9000 or Itanium if you are on an Integrity server.

Now, some of the other third-party software with which you may wish to link may have migrated to 64-bit, or perhaps ServiceGuard libraries are 64-bit now (I have to admit I don't follow ServiceGuard _that_ closely) and it is probably a good idea to get a 32 to 64-bit migration going by now anyway, but there is still support for native 32-bit binaries in 11iv2. It is only the _kernel_ that is 64-bit only.

[A. Clay Stephenson]

One of the things you really should watch out for (since you mentioned direct attached storage) is that unlike 10.20, 11.0, and 11.11 there is absolutely no support for HVD SCSI devices under 11iv2 -- so any of those devices you might be hoping to simply migrate to the new world ain't gonna happen. It is possible to use some HVD devices but only by using an LVD/HVD SCSI bus converter.