* * * READ ME * * *
              * * * Veritas Oracle Disk Manager 6.2 * * *
                         * * * Patch 100 * * *
                         Patch Date: 2016-12-28


This document provides the following information:

   * PATCH NAME
   * OPERATING SYSTEMS SUPPORTED BY THE PATCH
   * PACKAGES AFFECTED BY THE PATCH
   * BASE PRODUCT VERSIONS FOR THE PATCH
   * SUMMARY OF INCIDENTS FIXED BY THE PATCH
   * DETAILS OF INCIDENTS FIXED BY THE PATCH
   * INSTALLATION PRE-REQUISITES
   * INSTALLING THE PATCH
   * REMOVING THE PATCH


PATCH NAME
----------
Veritas Oracle Disk Manager 6.2 Patch 100


OPERATING SYSTEMS SUPPORTED BY THE PATCH
----------------------------------------
AIX 6.1
AIX 7.1


PACKAGES AFFECTED BY THE PATCH
------------------------------
VRTSodm


BASE PRODUCT VERSIONS FOR THE PATCH
-----------------------------------
   * Symantec Storage Foundation 6.2
   * Symantec Storage Foundation Cluster File System HA 6.2
   * Symantec Storage Foundation for Oracle RAC 6.2
   * Symantec Storage Foundation HA 6.2


SUMMARY OF INCIDENTS FIXED BY THE PATCH
---------------------------------------
Patch ID: 6.2.0.100
* 3906065 (3757609) CPU usage going high because of contention over ODM_IO_LOCK


DETAILS OF INCIDENTS FIXED BY THE PATCH
---------------------------------------
This patch fixes the following incidents:

Patch ID: 6.2.0.100

* 3906065 (Tracking ID: 3757609)

SYMPTOM:
High CPU usage because of contention over ODM_IO_LOCK

DESCRIPTION:
While performing ODM IO, to update some of the ODM counters we take
ODM_IO_LOCK which leads to contention from multiple  of iodones trying to update
 these counters at the same time. This is results in high CPU usage.

RESOLUTION:
Code modified to remove the lock contention.



INSTALLING THE PATCH
--------------------
Run the Installer script to automatically install the patch:
-----------------------------------------------------------
Please be noted that the installation of this P-Patch will cause downtime.

To install the patch perform the following steps on at least one node in the cluster:
1. Copy the patch odm-aix-Patch-6.2.1.100.tar.gz to /tmp
2. Untar odm-aix-Patch-6.2.1.100.tar.gz to /tmp/hf
    # mkdir /tmp/hf
    # cd /tmp/hf
    # gunzip /tmp/odm-aix-Patch-6.2.1.100.tar.gz
    # tar xf /tmp/odm-aix-Patch-6.2.1.100.tar
3. Install the hotfix(Please be noted that the installation of this P-Patch will cause downtime.)
    # pwd /tmp/hf
    # ./installVRTSodm621P1 [<host1> <host2>...]

You can also install this patch together with 6.2.1 maintenance release using Install Bundles
1. Download this patch and extract it to a directory
2. Change to the Veritas InfoScale 6.2.1 directory and invoke the installmr script
   with -patch_path option where -patch_path should point to the patch directory
    # ./installmr -patch_path [<path to this patch>] [<host1> <host2>...]

Install the patch manually:
--------------------------
If the currently installed VRTSodm is below 6.2.0.000, you must upgrade VRTSodm to
    6.2.0.000 level before installing this patch.
    AIX maintenance levels and APARs can be downloaded from the
    IBM Web site:
        http://techsupport.services.ibm.com
    Install the VRTSodm.bff patch if VRTSodm is
    already installed at fileset level 6.2.0.000
    A system reboot is recommended after installing this patch.
    To apply the patch,
    then enter these commands:
        # mount | grep odm
        # cd <patch_location>  
        # installp -aXd VRTSodm.bff VRTSodm


REMOVING THE PATCH
------------------
Run the Uninstaller script to automatically remove the patch:
------------------------------------------------------------
To uninstall the patch perform the following step on at least one node in the cluster:
    # /opt/VRTS/install/uninstallVRTSodm621P1 [<host1> <host2>...]

Remove the patch manually:
-------------------------
If you need to remove the patch, then enter these commands:
    file systems, then enter these commands:
        # mount | grep odm
        # installp -r VRTSodm 6.2.0.100
        # reboot


SPECIAL INSTRUCTIONS
--------------------
NONE


OTHERS
------
NONE