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## SIOS Protection Suite for Linux Patch Notes ##
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steeleye-lkHOTFIX-SAP-PL-6050-9.5.0-7075.noarch.rpm

Patch availability: General Availability
Product (s) Supported: This patch is valid only on LifeKeeper 9.5.0.

NOTE: This patch must be removed before upgrading LifeKeeper to a newer version beyond v9.5.0


Issue(s) addressed by this patch:
PL-6050 - split brain created during comm_up processing when migrating the ERS hierarchy.


Patch description:
This patch provides the following improvement to the SAP ERS v2 resource hierarchy migration:

1) This patch prevents ERS hierarchy migration during LifeKeeper comm_up processing.  With ERS v2 the goal is to have the ERS hierarchy running on a non-central services node but can run on the same node when a viable node is not available.  When a viable target becomes available LifeKeeper will migrate the ERS hierarchy to the available target.  In certain circumstances the migration would overlap with comm_up actions resulting in a split brain.  This patch prevents that overlap from occurring.


Download the patch:
This patch can be found on the SIOS FTP site at the following location:
        http://ftp.us.sios.com/pickup/SAP-rpm-PL-6050

To download the patch and associated files on Linux perform the following
steps:
1. Run the following commands:
        wget http://ftp.us.sios.com/pickup/SAP-rpm-PL-6050/steeleye-lkHOTFIX-SAP-PL-6050-9.5.0-7075.noarch.rpm
        wget http://ftp.us.sios.com/pickup/SAP-rpm-PL-6050/steeleye-lkHOTFIX-SAP-PL-6050-9.5.0-7075.noarch.rpm.md5sum
        wget http://ftp.us.sios.com/pickup/SAP-rpm-PL-6050/readme.txt
2. Verify the download by running the following command:
        md5sum -c steeleye-lkHOTFIX-SAP-PL-6050-9.5.0-7075.noarch.rpm.md5sum

NOTE: Alternative download methods can be used but must include all files.  Once the download is complete a verification of the md5sum should be performed.


Installing the rpm:
This patch should only be installed on clusters using the steeleye-lk-SAP-9.5.0-7075.noarch rpm.  The patch should be installed on all systems in the cluster that have that rpm.  This patch can be installed on a running system with no impact.  The installation of the patch will automatically create backup copies of all patched files.

To install the patch run the following command:

        rpm -ivh steeleye-lkHOTFIX-SAP-PL-6050-9.5.0-7075.noarch.rpm


Uninstalling the rpm:
On removal of the patch all modified files will be returned to their original pre-patched version.

To remove the patch run the following command:

        rpm -e steeleye-lkHOTFIX-SAP-PL-6050-9.5.0-7075.noarch