running different version of IDS 9.x
Hi! We are running some onlines of the version IDS9.21FC6 on HP Tru64 V5.0a Alpha Clusters. Now we are planning to upgrade to version 9.30FC3. We are also using the products 4GLRT, SQL, ESQL/C. We plane to install the new version IDS9.30 parallel to the version 9.21, and first migrate only one online to 9.30. I've checked, that the shared libraries of the two versions are different. When i installed the products, the links in the /usr/lib directories were replaced. lrwxrwxrwx 1 root system 31 Feb 6 12:28 iosm09a.so -> /usr/informix9.3/lib/iosm09a.so lrwxrwxrwx 1 root system 29 Mar 1 2002 iosm09a.so.021119 -> /usr/informix9/lib/iosm09a.so Is it possible to run different versions of IDS9.x on the same cluster/machine? There was no problem between the versiond 7.31 and 9.21 ( becaue the names of the libraries were different ). Thanks for information! Mit freundlichen Grüßen / Best Regards Wolfgang Neumar HPS C&I Healthcare Business Solutions Consultant Hewlett-Packard Ges.m.b.H Petzoldstraße 14, A-4020 Linz Tel.: +43 (732) 7665-1154 Fax: +43 (732) 7665-1421 mailto:Wolfgang.Neumar@hp.com http://www.hp.com/at
Wolfgang, You can run multiple versions on the same machine; it takes a little bit of planning and care. The short answer for your immediate problem is to set your LD_LIBRARY_PATH or SHLIB_PATH (one is for Sun; the other, HP, and I can never remember which one is which) to include the directory in which those libraries are contained. Obviously, this will have to be set differently for each version, so your environment settings will have to change. Also, don't do what I did, which is to simply append your entry on to the end of the path; that doesn't actually re-set it. You'll have to replace the entry in the SHLIB_PATH in order for that to work. There are also considerations for the development products as well; I did a presentation last year on directory structure standards at the IIUG conference (one I hope to repeat this year) which addresses the question of hosting multiple versions of the development products, server products, etc. on the same machine. There are some "gotchas" in doing that, and we continue to find them in our environment. My recommendation would be to install each product in a separate directory under /opt/informix (i.e. /opt/informix/IDS9.3.FC3, /opt/informix/4GLX.X.XX, and so forth), and then use the SHLIB_PATH and INFORMIXDIR to control what you're looking at when you do things. Just a note; there is a little more work to code compilation if you go with this method. You have to set INFORMIXDIR to the directory in which you've installed the tool that you want to compile under, but once you've compiled, you have to set INFORMIXDIR back to the engine directory in order to connect to the database. It's a little kludgey, but in our case, it beat the problem of having to install a separate INFORMIXDIR with full engine for each combination of engine and tool (we had 2 engine versions, and about 6 tool versions on the same machine, which would have required about 6 installations of the combinations -- some were not used by the applications running on the machine). If you choose to install the tools in the same directory as the engine, you'll not have the compilation problem, but I don't know how you'd manage multiple versions of the tool for the same engine version without re-installing the engine in a different directory. If you have further questions, please let me know; I'd like to see more discussion on the topic of directory structures. Our competitors have us beat badly on installation instructions (although to be fair, they need more of them than we do, in general) and standard directory structures, and we could do better as a community to resolve that. Dan Michaelis 813.978.6534 (office) 813.303.3225 (pager) dan.michaelis@verizon.com "WOLFGANG NEUMAR" <wolfgang.neumar@ To: ids@iiug.org hp.com> cc: Sent by: Subject: running different version of IDS 9.x [438] forum.subscriber@ iiug.org 02/20/2003 10:03 AM Hi! We are running some onlines of the version IDS9.21FC6 on HP Tru64 V5.0a Alpha Clusters. Now we are planning to upgrade to version 9.30FC3. We are also using the products 4GLRT, SQL, ESQL/C. We plane to install the new version IDS9.30 parallel to the version 9.21, and first migrate only one online to 9.30. I've checked, that the shared libraries of the two versions are different. When i installed the products, the links in the /usr/lib directories were replaced. lrwxrwxrwx 1 root system 31 Feb 6 12:28 iosm09a.so -> /usr/informix9.3/lib/iosm09a.so lrwxrwxrwx 1 root system 29 Mar 1 2002 iosm09a.so.021119 -> /usr/informix9/lib/iosm09a.so Is it possible to run different versions of IDS9.x on the same cluster/machine? There was no problem between the versiond 7.31 and 9.21 ( becaue the names of the libraries were different ). Thanks for information! Mit freundlichen Grüßen / Best Regards Wolfgang Neumar HPS C&I Healthcare Business Solutions Consultant Hewlett-Packard Ges.m.b.H Petzoldstraße 14, A-4020 Linz Tel.: +43 (732) 7665-1154 Fax: +43 (732) 7665-1421 mailto:Wolfgang.Neumar@hp.com http://www.hp.com/at