RP3440 vs Itanium servers - Application Code.

[terrytapp]

We have been running the application codes on K class servers(HP-UX 11.0). We decided to upgrade to RP3440(HP-UX 11.23) and we thought running the same apps would not be an issue and it is also a PA RISC based. Now The management feels that they should go for Itanium servers instead of RP3440. My question is will the apps (developed on PA RISC (11.0) )run on Itanium? Please advise the risk involved. Thanks in advance.

Best regards

Terry

[Tim Nelson]

Without knowing the application(s), my initial answer is probably not. IA is a completely different breed.

Others may chime in with possibilities about emulation.

I believe there are some migration docs on docs.hp.com that may shed some light or assist with a migration. It will boil down to just test it, or have someone else test it (e.g your app vendor) but I am sure there will be some app upgrade involved.

Post your experiences in this for future reference.

[Patrick Wallek]

Most PARISC code **SHOULD** run on Itanium via the Aries emulator.

You will probably see a performance penalty when running code via Aries, however it may still be faster than it was running on your K.

[terrytapp]

Thanks..what is the Aries emulator? does it mean there is no recompiling of the applications involved? it would a great news for us..

Thanks

Terry

[Patrick Wallek]

ARIES allows the execution of PA-RISC code on an Itanium server.

You do not HAVE to recompile, but you would definitely get better performance if you recompile your code to be native Itanium.

If you search the Forums, or HP's web site for Aries, you will find a LOT of information.

[Brem Belguebli]

Hi,

Most basic PA binaries will run via ARIES on Itanium, but if your application involves a lot of complex external libraries, it will certainly coredump.

We had some apps like this (on 11i PA) built with Ilog graphic and DB libraries and some other stuff, there was no way to make them run on 11iv2 IA64.

Aries is shipped with the system, no need to install extra software or to run your apps thru a wrapper.

[Deepak Kr]

Hi,

Using Aries emulator is good idea but as said in earlier comments you can map performance only if you compile code in IA Servers.

As IA is quite different from PA-RISC architecture so you will be reuired to work more in setting up things in IA environment.

Please traverse through HP websites for docs related to compilation issues/resolution.

We are also going through a big PA-RISC to IA migration in our Env.

Cheers!!
Deepak