\ncd $ORACLE_HOME\/lib
\nmv libodm11.so libodm11.so_stub
\nln \u2013s libnfsodm11.so libodm11.so
\n<\/code><\/p>\nIn the context of make-commands, somebody in the audience asked the question how Oracle persistently stores the current link options, so that a future relink won’t undo previous settings. E.g. when relinking without the partitioning option, will another relink include the objects again? As nobody had a good answer, I thought I’ll check that on Linux.<\/p>\n
REMARK: Below tests were done on 12.1.0.2.<\/p>\n
If options are linked in to the Oracle kernel (e.g. OLAP or Partitioning) is actually stored in the archive $ORACLE_HOME\/rdbms\/lib\/libknlopt.a. <\/p>\n
I.e. if I do relink the Oracle kernel without OLAP with the commands<\/p>\n
\n$ cd $ORACLE_HOME\/rdbms\/lib
\n$ make -f ins_rdbms.mk olap_off ioracle
\n<\/code><\/p>\nI can see the following first steps:<\/p>\n
\n\/usr\/bin\/ar d $ORACLE_HOME\/rdbms\/lib\/libknlopt.a xsyeolap.o
\n\/usr\/bin\/ar cr $ORACLE_HOME\/rdbms\/lib\/libknlopt.a $ORACLE_HOME\/rdbms\/lib\/xsnoolap.o
\n<\/code><\/p>\nThe object xsyeolap.o is removed from $ORACLE_HOME\/rdbms\/lib\/libknlopt.a and object $ORACLE_HOME\/rdbms\/lib\/xsnoolap.o added to it. The link command $ORACLE_HOME\/bin\/orald contains then the following argument:<\/p>\n
\n-lknlopt `if \/usr\/bin\/ar tv $ORACLE_HOME\/rdbms\/lib\/libknlopt.a | grep xsyeolap.o > \/dev\/null 2>&1 ; then echo \"-loraolap12\" ; fi`
\n<\/code><\/p>\nI.e. if object xsyeolap.o is in $ORACLE_HOME\/rdbms\/lib\/libknlopt.a then the argument -loraolap12 is added to the link command. As xsyeolap.o is no longer in $ORACLE_HOME\/rdbms\/lib\/libknlopt.a (it has been replaced with xsnoolap.o), the current and future link-commands won’t link OLAP into the kernel.<\/p>\n
Obviously adding OLAP again will include the xsyeolap.o to the library $ORACLE_HOME\/rdbms\/lib\/libknlopt.a again:<\/p>\n
\n$ make -f ins_rdbms.mk olap_on ioracle
\n\/usr\/bin\/ar d $ORACLE_HOME\/rdbms\/lib\/libknlopt.a xsnoolap.o
\n\/usr\/bin\/ar cr $ORACLE_HOME\/lib\/libknlopt.a $ORACLE_HOME\/rdbms\/lib\/xsyeolap.o
\n...
\n$ORACLE_HOME\/bin\/orald -o $ORACLE_HOME\/rdbms\/lib\/oracle ... -lknlopt `if \/usr\/bin\/ar tv $ORACLE_HOME\/rdbms\/lib\/libknlopt.a | grep xsyeolap.o > \/dev\/null 2>&1 ; then echo \"-loraolap12\" ; fi` ...
\n<\/code><\/p>\nWhat happens if the script $ORACLE_HOME\/bin\/relink with argument “all” is being used?<\/p>\n
Actually the relink script uses a perl script $ORACLE_HOME\/install\/modmakedeps.pl which generates a file $ORACLE_HOME\/install\/current_makeorder.xml. At the beginning of modmakedeps.pl I can see the following command:<\/p>\n
\n# initial hash populated with options from libknlopt
\nmy %opts_hash = ( 'kcsm.o' => 'rac_off\/rac_on',
\n 'kzlilbac.o' => 'lbac_off\/lbac_on',
\n 'kzvidv.o' => 'dv_off\/dv_on',
\n 'kxmwsd.o' => 'sdo_off\/sdo_on',
\n 'xsyeolap.o' => 'olap_off\/olap_on',
\n 'kkpoban.o' => 'part_off\/part_on',
\n 'dmwdm.o' => 'dm_off\/dm_on',
\n 'kecwr.o' => 'rat_off\/rat_on',
\n 'ksnkcs.o' => 'rac_on\/rac_off',
\n 'kzlnlbac.o' => 'lbac_on\/lbac_off',
\n 'kzvndv.o' => 'dv_on\/dv_off',
\n 'kxmnsd.o' => 'sdo_on\/sdo_off',
\n 'xsnoolap.o' => 'olap_on\/olap_off',
\n 'ksnkkpo.o' => 'part_on\/part_off',
\n 'dmndm.o' => 'dm_on\/dm_off',
\n 'kecnr.o' => 'rat_on\/rat_off',
\n 'jox.o' => 'jox_on\/jox_off' );
\n<\/code><\/p>\nI.e. we have the following 2 lines in there:<\/p>\n
\n 'xsyeolap.o' => 'olap_off\/olap_on',
\n 'xsnoolap.o' => 'olap_on\/olap_off',
\n<\/code><\/p>\nWhat that means is that the script uses the list in %opts_hash to check what the current objects are in $ORACLE_HOME\/rdbms\/lib\/libknlopt.a. Depending on the current objects in the archive it checks the original installation settings $ORACLE_HOME\/inventory\/make\/makeorder.xml and generates a new file with the necessary changes in $ORACLE_HOME\/install\/current_makeorder.xml. E.g. if xsyeolap.o is in $ORACLE_HOME\/rdbms\/lib\/libknlopt.a, but $ORACLE_HOME\/inventory\/make\/makeorder.xml has olap_off then create a copy of $ORACLE_HOME\/inventory\/make\/makeorder.xml in $ORACLE_HOME\/install\/current_makeorder.xml with olap_off changed to olap_on. If xsnoolap.o is in the archive but olap_on in $ORACLE_HOME\/inventory\/make\/makeorder.xml then generate $ORACLE_HOME\/install\/current_makeorder.xml with olap_off. Finally the relink happens using the runInstaller:<\/p>\n
\n$ORACLE_HOME\/oui\/bin\/runInstaller -relink -waitForCompletion -maketargetsxml $ORACLE_HOME\/install\/current_makeorder.xml -logDir $ORACLE_HOME\/install ORACLE_HOME=$ORACLE_HOME
\n<\/code><\/p>\nIf you want to see what options are currently set in your libknlopt.a you may do the following:<\/p>\n
\n$ $ORACLE_HOME\/perl\/bin\/perl $ORACLE_HOME\/install\/modmakedeps.pl $ORACLE_HOME $ORACLE_HOME\/inventory\/make\/makeorder.xml > \/tmp\/currentmakeorder.xml
\n$ grep TARGETNAME \/tmp\/currentmakeorder.xml | grep -E \"(_on|_off)\" | cut -d\"\"\" -f4
\n<\/code><\/p>\nOn my ORACLE_HOME the output of the last command ablove looks as follows:<\/p>\n
\nrat_on
\npart_on
\ndm_on
\nolap_on
\nsdo_on
\nrac_off
\ndnfs_off
\nctx_on
\n<\/code><\/p>\nIn case you want to relink the Oracle kernel with the original installation settings then use<\/p>\n
\n$ relink as_installed
\n<\/code><\/p>\nThe runinstaller will use the original $ORACLE_HOME\/inventory\/make\/makeorder.xml as the argument for -maketargetsxml then.<\/p>\n
So no worries if you have to relink the oracle kernel several times with different options. Previous settings are stored persistently in the archive $ORACLE_HOME\/rdbms\/lib\/libknlopt.a. If you don’t remember what changes you have done and want to go back to the installation settings then use <\/p>\n
\n$ relink as_installed
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"I recently visited an Oracle presentation about the Oracle-kernel built-in directNFS (dNFS) driver. To use dNFS in the database you have to enable it: cd $ORACLE_HOME\/rdbms\/lib make -f ins_rdbms.mk dnfs_on REMARK: In versions before 11gR2\/12c the following manual steps were necessary: cd $ORACLE_HOME\/lib mv libodm11.so libodm11.so_stub ln \u2013s libnfsodm11.so libodm11.so In the context of make-commands, […]<\/p>\n","protected":false},"author":35,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229,198,59],"tags":[796,797,96,798],"type_dbi":[],"class_list":["post-7540","post","type-post","status-publish","format-standard","hentry","category-database-administration-monitoring","category-database-management","category-oracle","tag-link","tag-make","tag-oracle","tag-relink"],"acf":[],"yoast_head":"\n
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