Summary of changes

• Introduced support to disable AFM by using disable-online feature. For more information, see Disable AFM by using disable-online feature and mmchfileset command.
• Introduced new AFM configuration parameter, afmSyncReadMount that helps create a separate mount path at the gateway node through which synchronous read calls are sent to the home cluster separately. For more information, see mmchfileset, mmcrfileset commands, Configuration parameters for AFM, AFM-DR and AFM to COS and AFM synchronous read mount.

Support for GKLM REST CA-signed certificates

IBM Spectrum Scale supports GKLM REST CA-signed certificates. For more information, see mmkeyserv command.

Support for Dynamic page pool (Tech Preview)

IBM Spectrum Scale introduces the Dynamic page pool feature as Technical Preview. The feature manages the size of the page pool within a configuration range. This avoids the administrative task of determining a fixed page pool size and allows the better handling of workloads with varying memory usage requirements. Refer to the following IBM Spectrum Scale support page for additional documentation, restrictions, and requirements: https://supportcontent.ibm.com/support/pages/node/6956570.

Comprehensive online file system repair for inode and block allocation map corruptions (Tech Preview)

A new [--repair] option is added to the mmfsckx command as a Technical Preview feature. This option can be used to repair file system corruption such as user file inode/metadata corruptions and block/inode allocation map inconsistencies. This option does not repair reserved inodes or directory inconsistencies. The support of the [--repair] option can be tested on non-production systems only due to the tech preview license.

For more information, contact IBM on scale@us.ibm.com.

Parallel Inode Traversal (PIT) framework enhancement

The Parallel Inode Traversal (PIT) framework enhancement ensures that the file repair operation can be resumed from the last repaired data block where it was paused due to the conflicting file operations. This enhancement only improves the performance of the repairing file operation that is initiated by the mmrestripefs, mmstartdisk, and mmchdisk commands when heavy workloads or multiple of the above mentioned long running commands are running in the cluster. The enhancement could also reduce the normal file operations' waiting time on the PIT threads.

Support for setting the extended system.nfs4_acl attribute

Support for setting the extend system.nfs4_acl attribute as another method for manipulating NFSv4 ACLs in IBM Spectrum Scale. This is done to support the Linux® NFSv4 ACL command-line tools. The tools in the nfs4-acl-tools package can be used to get and set NFSv4 ACLs for files and directories directly in IBM Spectrum Scale. For more information, see Q2.41 in IBM Spectrum Scale FAQ in IBM® Documentation.

Inode allocation improvements

The responsiveness of the inode expansion in low free-inode situations has been improved.

A man page for the mmstartpolicy command

A man page is now provided for the mmstartpolicy command. This command has been provided in previous versions of IBM Spectrum Scale but without a man page. Generally the mmstartpolicy command is configured and run through the GUI.

• Support for prebuilt gplbin installation and upgrade support on RHEL and SLES Operating system.
• Toolkit support for option to specify a port to use for both tscTcpPort (daemon) and mmsdrservPort (sdr/cc).
• ECE Ansible toolkit enhancement to support checking fault tolerance for node upgrade.
• ECE Ansible toolkit enhancement to check and show how many DAs, type and usable spaces are available.

• Cloudkit tool allows the user to deploy IBM Spectrum Scale within multiple cloud providers (currently limited to AWS), offering flexibility in terms of deployment topology.
• Provides a centralized management interface for deploying and managing scale clusters across different cloud environments and different regions within the same cloud environment.
• Configures IBM Spectrum Scale with security features recommended by the Cloud vendor.

• POST filesystems/{filesystemName}/filesets/cos
• POST SMB/shares

For more information, see IBM Spectrum Scale management API endpoints.

• DAS S3 Exports/Accounts/Services must be active on a CNSA environment with DAS enabled.

• Added the -X | --extended option to the mmhealth node show command to print additional information for all active events. For more information, see the mmhealth command.

• New events added for the following:

  • GPFS events
  • AFM events
  • Network events
• Added new IP addresses for esupport.ibm.com to consider during firewall configurations. For more information, see Firewall recommendations for call home and Installing call home.
• Introduced GPFSPDDisk metrics for IBM Spectrum Scale GPFS metrics. For more information, see GPFS metrics.

New commands

• cloudkit

New structures

There are no new structures.

New subroutines

There are no new subroutines.

New user exits

There are no new user exits.

Changed commands

• spectrumscale
• mmaddcallback
• mmchfileset
• mmcrfileset
• mmcrcluster
• mmhealth
• mmkeyserv
• mmnfs
• mmxcp

Changed structures

There are no changed structures.

Changed subroutines

gpfs_putacl()

gpfs_putacl_fd()

gpfs_getacl()

gpfs_getacl_fd()

Deleted commands

There are no deleted commands.

Deleted structures

There are no deleted structures.

Deleted subroutines

There are no deleted subroutines.

New messages

6027-2053, 6027-2421 through 6027-2427, and 6027-3268

Changed messages

There are no changed messages.

Deleted messages

There are no deleted messages.