Re: different take on Java 6 question
Mark Post wrote: On 11/21/2008 at 10:07 AM, [EMAIL PROTECTED] wrote: found the IBM link for jdk downloads - now a different question. Will the 31-bit jdk work - and work well - in a 64-bit linux environment. We run the 32-bit java on 64-bit AIX without any difficulty since quite a few of our apps refuse to work with the 64-bit java. Don't have any experience in the linux world with this, though. The recommendation I've heard from IBM is to run 31-bit if at all possible. It's largely going to depend on the heap size you need for your application. Applications drive the java requirement - SAP requires the 64bit IBM SDK. This opens another ongoing peeve of mine... Novell-Suse ship the IBM javas on the DVD and supply updates - great job! Also nice work on the /etc/alternates and the update-alternatives command - all very nice if you need to run multiple levels of java at the same time. But these rpms install into /usr, the rpms from the IBM website install into /opt. SAP recommends that one should use the java from the IBM website because IBM often posts updates before Novell-Suse can which kind of defeats all the good work done by Novell-Suse :-( It would be nice if the two companies could sync-up on how the rpms should be packaged. mark -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
different take on Java 6 question
found the IBM link for jdk downloads - now a different question. Will the 31-bit jdk work - and work well - in a 64-bit linux environment. We run the 32-bit java on 64-bit AIX without any difficulty since quite a few of our apps refuse to work with the 64-bit java. Don't have any experience in the linux world with this, though. Thanks again, Bruce -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: different take on Java 6 question
I don't know, but probably worth trying. The JNI API is not binary-compatible between 32-bit and 64-bit JDK's, which is probably why your applications don't like the 64-bit Java on AIX. Douglas From: [EMAIL PROTECTED] To: LINUX-390@VM.MARIST.EDU Date: 11/21/2008 10:27 AM Subject: [LINUX-390] different take on Java 6 question found the IBM link for jdk downloads - now a different question. Will the 31-bit jdk work - and work well - in a 64-bit linux environment. We run the 32-bit java on 64-bit AIX without any difficulty since quite a few of our apps refuse to work with the 64-bit java. Don't have any experience in the linux world with this, though. Thanks again, Bruce -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: different take on Java 6 question
On 11/21/2008 at 10:07 AM, [EMAIL PROTECTED] wrote: found the IBM link for jdk downloads - now a different question. Will the 31-bit jdk work - and work well - in a 64-bit linux environment. We run the 32-bit java on 64-bit AIX without any difficulty since quite a few of our apps refuse to work with the 64-bit java. Don't have any experience in the linux world with this, though. The recommendation I've heard from IBM is to run 31-bit if at all possible. It's largely going to depend on the heap size you need for your application. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: different take on Java 6 question
On Friday 21 November 2008, [EMAIL PROTECTED] wrote: found the IBM link for jdk downloads - now a different question. Will the 31-bit jdk work - and work well - in a 64-bit linux environment. We run the 32-bit java on 64-bit AIX without any difficulty since quite a few of our apps refuse to work with the 64-bit java. Don't have any experience in the linux world with this, though. Thanks again, Bruce -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 Have you tried OpenJDK. I understand the Debian build it for the Z series although I am not sure wether they build for 32 or 64 bit. However it is open source so if there are problems you can always fix them. David -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: different take on Java 6 question
AFAIK, the IBM Java SDK is the only one that has a JIT that targets the z instruction set. Its the same dynamic compilation technology that is used by the z/OS Java SDK. (it compiles byte codes into native / optimized machine instructions at run time) If you poke around the OpenJDK docs, you'll see that only a byte-code interpreter is available for s390. Running Java without a JIT compiler is *not* a good idea :-) Kirk Wolf Dovetailed Technologies http://dovetail.com On Fri, Nov 21, 2008 at 2:03 PM, David Goodenough [EMAIL PROTECTED] wrote: Have you tried OpenJDK. I understand the Debian build it for the Z series although I am not sure wether they build for 32 or 64 bit. However it is open source so if there are problems you can always fix them. David -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
