Partition and Mount Disk on LINUX in an existing Oracle Database

Here the draft that I followed in my post:

Partition EMC LUNs to allocate more disk space for Oracle



1. Partition the presented disks

"EMC was able to create the 3x20Gb storage "

Say for example the presented disks are:

# fdisk -l
/dev/hda
/dev/hdb
/dev/hdc

# fdisk /dev/hda
n --new patition
p --partition
1 --partition 1
<Enter>
+1024M --size of the partition
n --new partition
p --partition
2 -- partition 2
<Enter>
+1024M --size of the partition
n --new partition
p --partition
<Enter> --default 4th partition
<Enter>
p --print the partitions I made
w --write the new partition table and save

--see my drawing for the details.


2. Format the partitioned devices

# mkfs -t ext3 /dev/hda1
# mkfs -t ext3 /dev/hda2
# mkfs -t ext3 /dev/hda3


3. Create a TEMPORARY mount point for the new devices

# mkdir /mnt/bdump
# mkdir /mnt/cdump
# mkdir /mnt/udump

--set necessary permissions to the oracle user


4. Disable the cluster services on the node you are working on

$CRS_HOME/bin/crsctl disable crs

5. Shut down the instance, ASM, services, and nodeapps on the node you are working on
-- srvctl stop instance -d database_name -i instance_name
-- srvctl stop asm -n hostname
-- srvctl stop services -n hostname
-- srvctl stop nodeapps -n hostname

6. Reboot the node
-- after reboot, wait around 5-10 minutes
-- issue ps -ef | grep crs
-- $CRS_HOME/bin/crs_stat -t
to ensure that no Oracle binaries are running

7. Mount the new partitions into their temporary mount points:
-- mount /dev/hda1 /mnt/bdump
-- mount /dev/hda2 /mnt/cdump
-- mount /dev/hda3 /mnt/udump

8. Navigate to the $ORACLE_BASE directory, and identify the files/directories to be copied, copy those files to the new devices
-- cp -rp $ORACLE_BASE/admin/SID/bdump/* /mnt/bdump
-- cp -rp $ORACLE_BASE/admin/SID/cdump/* /mnt/cdump
-- cp -rp $ORACLE_BASE/admin/SID/udump/* /mnt/udump

9. As a way to be able to rollback from errors, simply rename the old dump directories, rather than deleting them
-- mv $ORACLE_BASE/admin/SID/bdump $ORACLE_BASE/admin/SID/bdump-old
-- mv $ORACLE_BASE/admin/SID/cdump $ORACLE_BASE/admin/SID/cdump-old
-- mv $ORACLE_BASE/admin/SID/udump $ORACLE_BASE/admin/SID/udump-old

10. Create the dump directories that will serve as the PERMANENT MOUNTPOINTS of the new drives
-- mkdir $ORACLE_BASE/admin/SID/bdump
-- mkdir $ORACLE_BASE/admin/SID/cdump
-- mkdir $ORACLE_BASE/admin/SID/cdump

11. Test the mounting of the new devices
-- umount /mnt/bdump
-- umount /mnt/cdump
-- umount /mnt/udump
-- mount /dev/hda1 $ORACLE_BASE/admin/SID/bdump
-- mount /dev/hda2 $ORACLE_BASE/admin/SID/cdump
-- mount /dev/hda3 $ORACLE_BASE/admin/SID/udump

12. Verify mounting
-- df -h should output something similar to this:


Filesystem            Size  Used Avail Use% Mounted on
/dev/hda1             1024M   16K  1023M   1% /u01/app/oracle/admin/SID/bdump
/dev/hda2             1024M   16K  1023M   1% /u01/app/oracle/admin/SID/cdump
/dev/hda3             1024M   16K  1023M   1% /u01/app/oracle/admin/SID/udump


13. Check the navigation. You should not be able to notice any difference when attempting to access the files such as the alert log. It should seem that they are still in the same location.
-- cat $ORACLE_BASE/admin/SID/bdump/alert_SID.log

14. Once these are good, create the entries in the fstab to permanently mount the new devices

15. Reboot the machine, and check for persistence.

16, If the mountpoints are now solid, and you have no more issues, enable the CRS
-- $CRS_HOME/bin/crsctl enable crs

17. Reboot the machine, move on to the next node, repeat.

Comments

Post a Comment

Popular posts from this blog

RMAN Restoration to New Server with Different Directory and New Database Name

In this case, I have an existing production database with RMAN Level 0 backup: CONFIGURE CONTROLFILE AUTOBACKUP ON; CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO 'C:\flash_recovery_area\galaxy\backupsets\autobackup\SAMSUNG-ctl_%F'; CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS; CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT 'C:\flash_recovery_area\galaxy\backupsets\level0\level0-%d-%T-%U' MAXPIECESIZE 4G; DELETE NOPROMPT ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE - 7'; SHOW ALL; REPORT SCHEMA; LIST BACKUP OF DATABASE; REPORT NEED BACKUP; REPORT UNRECOVERABLE; LIST EXPIRED BACKUP BY FILE; LIST ARCHIVELOG ALL; REPORT OBSOLETE; CROSSCHECK BACKUP DEVICE TYPE DISK; CROSSCHECK COPY OF ARCHIVELOG ALL; DELETE NOPROMPT EXPIRED BACKUP DEVICE TYPE DISK; DELETE NOPROMPT OBSOLETE DEVICE TYPE DISK; RUN { sql 'alter system archive log current'; BACKUP INCREMENTAL LEVEL 0 DATABASE PLUS ARCHIVELOG DELETE INPUT; } LIST BACKUP ...
Read more

[Script] Tablespace Usage Alert

Hi, This is another variation of the previous scripts presented in this blog site. The building blocks of this script is the same as the Disk Space and ASM Diskgroup Space Monitoring scripts. This will alert you via email if a certain tablespace  reaches the set threshold. Let's share and make others love Oracle, too. For tablespace monitoring alert scripts. We have the following: Tablespace Monitoring Script You will notice that there is a pattern in the scripts creation presented in this blog.  Part 1: Report Generation : Here it is the tablespace report Part 2: Report output string process : Scripts are created to process further report into columns. Conditional statement was created to test the values in the report. Part 3: Check if the file generates alert : Email is sent if entities met the threshold. # # # # # #----- Start of Script -----###### #!/bin/bash  # Report tablespace usage  sqlplus "/ as sysdba" << EOF SET LINES 700...
Read more

[Script] ASM Diskgroup Space Usage Alert

Hi Again, Another important task that a DBA should do is to monitor the ASM diskgroup usage. We do not just add space to tablespaces, create more tablespaces or resize datafiles to increase storage without checking if there is space to our ASM diskgroup. Also, when we perform RMAN backups stored in ASM or Datapump Exports stored in ASM, we have to monitor and get alerts if we are running out of space. This is a simple monitoring script. I hope this could help you. Let's share and make others love Oracle, too. ASM Diskgroup  Space Monitoring ######--- Start of Script -----###### #!/bin/bash  # Report ASM Diskgroup space usage  #NOTES:  # 1. There is really a slash on the v$asm_diskgroup so Unix interpreter will treat dollar sign as a literal $ # 2. Set your tablespace threshold by changing the value of the AND clause  " >= 80" sqlplus "/ as sysdba" << EOF SET LINES 700 SET FEEDBACK OFF SET TRIMSPOOL ON SET ECHO OFF SPOOL /tmp/ASMs...
Read more