Synopsis.
As its integration of grid computing features that had only been available in a
Real Application Clusters (RAC) clustered database environment, Oracle Database
11g Release 2 (11gR2) integrates a new ASM-based file system – the ASM
Clustered File System – that offers the ability to store files other than
database specific files like online redo logs, control files, and datafiles. This
article – the next in this series – will demonstrate how to install and
configure a new Oracle 11g Release 2 (11gR2) Grid Infrastructure home as the
basis for the majority of these grid computing features.
Oracle Database 11gR2: Installing Grid Infrastructure explained how to:
-
Configure ASMLIB
for block devices -
Install the new Oracle 11gR2 Grid Infrastructure
components in single-server mode -
Create an ASM
instance using the Grid Infrastructure tools
Continuing
along this same course, I’ll next illustrate how to:
-
Install and configure the new Oracle 11gR2 ASM
Clustered File System (ACFS) -
Create a new Oracle 11gR2 database home
within an ACFS file system -
Use myriad new features of the ASM command-line utility, ASMCMD, to manage all facets of an ASM
instance, ASM disk groups, and ASM disks
Installing ACFS: Preparation
Now
that I’ve got an Automatic Storage
Management (ASM) instance configured, I’ll turn my attention to
setting up a new ASM disk group that uses 11gR2’s
new ASM Cluster File System
(ACFS) as its underlying file system. First, I’ll verify whether my ASM
instance has been successfully restarted after I rebooted my host server:
[oracle@11gR2Base ~]$ ps -ef | grep +ASM oracle 13568 1 0 11:30 ? 00:00:00 asm_pmon_+ASM oracle 13570 1 0 11:30 ? 00:00:00 asm_vktm_+ASM oracle 13574 1 0 11:30 ? 00:00:00 asm_gen0_+ASM oracle 13576 1 0 11:30 ? 00:00:00 asm_diag_+ASM oracle 13578 1 0 11:30 ? 00:00:00 asm_psp0_+ASM oracle 13580 1 0 11:30 ? 00:00:06 asm_dia0_+ASM oracle 13582 1 0 11:30 ? 00:00:00 asm_mman_+ASM oracle 13584 1 0 11:30 ? 00:00:00 asm_dbw0_+ASM oracle 13586 1 0 11:30 ? 00:00:00 asm_lgwr_+ASM oracle 13588 1 0 11:30 ? 00:00:00 asm_ckpt_+ASM oracle 13590 1 0 11:30 ? 00:00:00 asm_smon_+ASM oracle 13592 1 0 11:30 ? 00:00:00 asm_rbal_+ASM oracle 13594 1 0 11:30 ? 00:00:02 asm_gmon_+ASM oracle 13596 1 0 11:30 ? 00:00:00 asm_mmon_+ASM oracle 13598 1 0 11:30 ? 00:00:00 asm_mmnl_+ASM oracle 14318 14217 0 17:09 pts/2 00:00:00 grep +ASM [oracle@11gR2Base ~]$ . oraenv ORACLE_SID = [orcl] ? +ASM The Oracle base for ORACLE_HOME=/u01/app/oracle/product/11.2.0/grid is /u01/app/oracle [oracle@11gR2Base ~]$ srvctl status asm ASM is running on 11gr2base
Excellent
news! My ASM instance is running after the server was rebooted, and this means
that the setup for Oracle 11gR2 High Availability Services (HAS) is still
intact. If you’ve worked with Oracle
Clusterware (OC) and Real
Application Cluster (RAC) databases in prior Oracle releases, by the
way, you’ll notice that I used the venerable srvctl
OC command to confirm the status of my ASM instance. This illustrates that
Oracle Clusterware is indeed imbedded within the Grid Infrastructure components
of Oracle 11gR2. (I’ll be
covering a range of new srvctl commands in my next article as we explore
how an Oracle single-instance database is managed within the 11gR2 Grid Infrastructure.)
Configuring ACFS For Server Reboots. Before
I can proceed with the creation of an ACFS-based Oracle Home, I need to verify
that the corresponding ACFS module and its service, oracleacfs, is also running. I’ll
connect as the root user and then issue the lsmod command to search for that
service:
#> lsmod | grep oracle
oracleasm 81576 1
Unfortunately,
neither oracleacfs nor its counterpart oracleadvm service
that Oracle uses to manage ASM Dynamic
Volume Management (ADVM), is loaded right now because I haven’t yet
implemented the proper acfsload startup script. Much like the losetup
script in the prior article, I’ve built a new script, /etc/init.d/acfsload,
as shown below, and I’ll activate this script as a service for automatic reboot
using the Linux chkconfig
command:
#> view /etc/init.d/acfsload #!/bin/sh # chkconfig: 2345 30 31 # description: Automatically load Oracle 11gR2 ACFS drivers during system reboot /u01/app/oracle/product/11.2.0/grid/bin/acfsload start -s #> chmod 775 acfsload #> chkconfig --add acfsload #> chkconfig --list acfsload acfsload 0:off 1:off 2:on 3:on 4:on 5:on 6:off
Once
I constructed and then executed this script manually, I can confirm that the
proper ACFS and ADVM modules are now loaded:
#> lsmod | grep oracle oracleacfs 877320 0 oracleadvm 221760 0 oracleoks 276880 2 oracleacfs,oracleadvm oracleasm 81576 1
