IBM Spectrum Scale 4.2 release
supports node-at-a-time upgrade if the previous nodes in the cluster are running IBM Spectrum Scale 4.1.x release. IBM Spectrum Scale 4.1.x nodes can coexist and interoperate with
nodes that are running IBM Spectrum Scale 4.2.
However, new functions that depend on format changes will not be available until all nodes have been
upgraded. The following procedure can also be used to upgrade from IBM Spectrum
Scale 4.2.y to 4.2.z, for example from IBM Spectrum Scale 4.2.2 to 4.2.3.
To upgrade a cluster to IBM Spectrum Scale 4.2.y release from IBM Spectrum Scale 4.1.x release, perform the following steps:
- Stop all user activity in the file systems on the designated
node.
For information about how to stop and unmount
NFS running over IBM
Spectrum Scale file systems, see Unmounting a file system after NFS export.
- Cleanly unmount the mounted IBM Spectrum Scale file system.
Do not use force to unmount the designated node.
- Follow any local administrative backup procedures to ensure
protection of your file system data in the event of a failure.
- Stop IBM Spectrum Scale on the node to be
upgraded in the cluster using the
mmshutdown command.
For example: mmshutdown -N k164n04, where k164n04 is
the designated node.
- Upgrade to IBM Spectrum Scale 4.2 release depending on the operating
system:
For Linux nodes:
For Hadoop users:
To upgrade the IBM Spectrum Scale Hadoop
Connector through Ambari, see Upgrading HDFS Transparency in IBM Spectrum
Scale: Big Data and
Analytics Guide.
To upgrade the IBM Spectrum Scale Hadoop Connector manually, see Upgrading the HDFS
Transparency cluster in IBM Spectrum
Scale: Big Data and
Analytics Guide.
For AIX® nodes:
Note: Specific to AIX, when upgrading from 4.1.x to 4.2.y.z, you must upgrade to 4.2.y.0 first
and then you can upgrade to 4.2.y.z.
For Windows nodes- Open the Programs and Features control panel and remove IBM
Spectrum Scale Express Edition 4.1.x or IBM Spectrum Scale Standard Edition
4.1.x.
- Uninstall IBM Spectrum Scale 4.1.1 and
reboot.
- Uninstall IBM
GPFS GSKit 8.0.x.x and reboot.
- Uninstall the IBM Spectrum Scale 4.1.1
license.
- Copy the installation images and install the IBM
Spectrum Scale licensed program as described in Installing IBM Spectrum Scale on Windows nodes.
Note: For Windows upgrades, it is required that all IBM Spectrum Scale administration commands are executed from the
4.2 node.
- Start IBM
Spectrum Scale on the designated node in the cluster using the mmstartup command.
For example: mmstartup -N k164n04, where k164n04 is
the designated node.
- Mount the file systems if this is not done automatically
when the IBM Spectrum
Scale daemon starts.
When all nodes in the cluster have been successfully upgraded to the new IBM
Spectrum Scale level, proceed to the
Completing the upgrade to a new level of IBM Spectrum Scale topic.