Summary of changes

• Deletion of objects by using non-MDS gateway. For more information, see Improving write and remove operations efficiency in the manual updates mode.
• Iodes eviction from an AFM cache. For more information, see Evicting metadata or inode automatically from AFM filesets.
• Restructured data migration by using AFM. For more information, see Migrating data by using active file management.
• Added startCutover, --check-unmigrated, and --path Path configuration options for data migration improvement. For more information, see mmafmctl command.

• Support to upgrade IBM Storage Scale clusters on Microsoft Azure cloud.
• Support for AFM to cloud object storage on Microsoft Azure.

• From version 5.2.0.1 onward, IBM Storage Scale can use IBM Key Protect with Key Management Interoperability Protocol (KMIP) as a back-end server for file system encryption. The IBM Key Project with KMIP is available as a service in IBM Cloud and, by using the regular setup, can be configured as a back-end key server for IBM Storage Scale for file system encryption.
• Starting with the file system format level 35.00 (available with IBM Storage Scale 5.2.1.0), the mmaudit command can provide information about the CLOSEWRITE events. This is a new event type that gets logged when a file is opened for a writing operation and then closed.
• NVMe persistent reservations for multi-attach volumes in Amazon Web Services (AWS). Added support for NVMe reservations for improved failover times, similar to SCSI persistent reservations (PR). This support is limited to multi-attach volumes in AWS virtual machines.
• From version 5.2.1 onward, nodes that are expelled by using the mmexpelnode command are not allowed to rejoin the cluster until they are removed from the list by using mmexpelnode -r/--reset (unless the -o/--once option is specified). In previous levels of IBM Storage Scale, expelled nodes were allowed to rejoin if the node appointed as cluster manager changed. Now, nodes that are expelled with mmexpelnode stay expelled, even if the cluster manager goes down or otherwise changes. The new configuration can be reverted by issuing the mmchconfig disablePersistExpelList=yes command. For more information, see mmchconfig command and The mmexpelnode command.
• Improved administration options for expiring or expired cluster keys. Administrators can ease their planning of new keys generation and commit by harnessing a new field and a new option that are introduced in version 5.2.1.0. Supported by mmauth show and mmremotecluster show commands, the Key Expiration field displays the expiration date for a key. And, if the cluster keys have expired by the time they are consulted, the mmauth command can be used with the --force option to generate new cluster keys. For more information, see mmauth command and mmremotecluster command.
• Improved performance in file creation or deletion during an mmfsckx command scanning of large reserved files. For more information, see mmfsckx command.
• The NSD server functionality is now supported on arm64 platforms.
• Optimized the compatibility mode for GPU direct storage to contribute to improve performance. For more information, see GPUDirect Storage support for IBM Storage Scale.
• Improved logic to better handle IPv6/IPv4 mixed multi-cluster environment, which permits an IPv6 remote cluster and an IPv4 remote cluster both join an IPv6-enabled home cluster in some conditions.
• Improved mmap writeback performance. If no page-pool buffers are available, mmap writeback internally uses direct I/O to write this data to disk, which in previous versions might lead to time out errors for snapshot commands because the direct I/O requests were limited to the page size (4 KB on x86_64). Starting with IBM Storage Scale 5.2.2, this limit is determined by the block size of the file system; so, if the block size of the file system allows it, larger I/O requests can be supported to write the data to disk.
• Starting with version 5.2.0, IBM Storage Scale adds two new cipher suites that can be used for the daemon-to-daemon TLS connections. These newly added cipher suites are based on elliptic curve cryptography (ECC).
  The following cipher suites are now available:

  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  In an IBM Storage Scale cluster environment with mixed level, the following cipher suites are used with daemons from prior versions:

  • TLS_RSA_WITH_AES_128_CBC_SHA256
  • TLS_RSA_WITH_AES_256_CBC_SHA256

• Updated Samba on IBM Storage Scale to the upstream Samba 4.19.8 version.
• The deadtime SMB configuration parameter is set to 1 minute. If this parameter value is set before the upgrade, the set value continues after the upgrade. For more information, see mmsmb command.
• As a technology preview, IBM Storage Scale 5.2.2 supports the NFS 4.2 protocol. For more information, see the following IBM Storage Scale support page: https://www.ibm.com/support/pages/node/7174841

• As a technology preview feature, the installation toolkit supports Native REST API installation and configuration.
• Extended operating system certification and support.
• Code enhancement to work with the latest Ansible library.
• Support to upgrade CES S3.
• Certification with Python 3.12.

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

• The operating system packages of smc-tools and qclib are automatically installed during the IBM Storage Scale installation on Linux on Z.

• Upgrade support for the S3 protocol to allow upgrade of S3 protocol shipped with IBM Storage Scale 5.2.1.x to the S3 protocol shipped with IBM Storage Scale 5.2.2.x.
• S3 Versioning (available as RPQ feature)
• The syslog-ng support
• Anonymous account support (public bucket access)

This release of the AWS Marketplace offering includes the following improvements. All improvements are available after an upgrade, unless otherwise specified.

Changes in features

IBM Storage Scale 5.2.2 is supported for AWS BYOL 1.5.0.

Changes in operating system

Upgraded to RHEL 9.4.

Updated the mmcrnsd command to replace the Developer Edition NSD total capacity limit from 12 TB to 12 TiB.

New commands

• mmpstat

New structures

There are no new structure changes.

New subroutines

There are no new subroutines.

New user exits

There are no new user exits.

Changed commands

• cloudkit
• mmaddcallback
• mmafmcosctl
• mmafmctl
• mmauth
• mmbackup
• mmces
• mmchconfig
• mmcrfileset
• mmchfileset
• mmexpelnode
• mmhealth
• mmimportnvmeof
• mmkeyserver
• mmlslicense
• mmperfmon
• mmremotecluster
• mms3
• mmsmb
• spectrumscale

Changed structures

There are no changed structures.

Changed subroutines

There are no changed subroutines.

Deleted commands

There are no deleted commands.

Deleted structures

There are no deleted structures.

Deleted subroutines

There are no deleted subroutines.

New messages

6027-2064, 6027-3419, 6027-3420, 6027-4111

Changed messages

There are no changed messages.

Deleted messages

There are no deleted messages.