Readme and Release notes for release 5.0.5.0 IBM Spectrum Scale 5.0.5.0 Spectrum_Scale_Standard-5.0.5.0-x86_64-Linux Readme

Changes to the IBM Spectrum Scale 5.0.5.0 include the following:

• AFM and AFM DR-related changes

  
  
      Migration enhancements for AFM data migration. Set the afmReadDir
        Once and afmRefreshOnce parameters of AFM. 
      Support of fast create for AFM and AFM-DR. The parameter afmFastCreate 
        must be enabled for the fast create feature. 
  
  
  
  

• Changes in IBM Spectrum Scale Big Data Analytics Integration Toolkit for HDFS Transparency (Toolkit for HDFS) 1.0.0.1

  Supports deployment on ESS.
  Supports remote mount filesystem only for CES HDFS protocol.
  Requires IBM Spectrum Scale 5.0.4.3 and HDFS Transparency 3.1.1-0.
  
  

• File audit logging changes

  With fileset file audit logging, you can specify a list of filesets to 
  enable or skip from a file system. 
  
  

• File system core improvements

  File encryption supports IBM® Security Key Lifecycle Manager (SKLM) 4.0
     File encryption supports SKLM 4.0 as a Remote Key Management (RKM) server. 
  
  File encryption supports Thales Vormetric DSM 6.3 and DSM 6.4
     File encryption supports Thales Vormetric DSM 6.3 and DSM 6.4 as a Remote Key Management servers.
  
  IBM Spectrum Scale supports Windows Server 2019
     
  The mmkeyserv command replaces expired key client certificates
     The mmkeyserv client update command replaces an expired or unexpired certificate 
     in a key client. You no longer need to follow the lengthy manual method for 
     replacing a key client certificate.
  
  Contiguous AIO/DIO write operations are combined before being committed to storage
     The dioSmallSeqWriteBatching attribute of the mmchconfig command holds small 
     Asynchronous Input/Output-Direct I/O write operations (up to 64 KiB) for a 
     few microseconds and combines any contiguous write operations that occur before 
     committing the write data to storage.
  
  The cp --preserve=xattr Linux command copies ACL attributes
     The cp --preserve=xattr Linux command is extended to copy the following 
       attributes when a file is copied:
  
      system.posix_acl_access -- The access ACL of the file
      system.posix_acl_default -- The default ACL of the file
      system.gpfs_nfs4_acl -- The GPFS internal NFS4 ACL attribute
  
  Performance improvements
      
      Performance is greatly improved for listing the files in a directory that 
         contains a large number of fileset junctions.
      Faster processing of quota checking (mmcheckquota) while traversing sparse 
         sections of a very large inode0 file.
      Performance is improved for mmap read workloads when multiple threads read the same file.
  
  Support all 12 Gb/s LSI RAID Controller Cards.
  New disk performance precheck tool.
  mmvdisk suspend node with deferred rebuild process for maintenance.
  Disk management trouble shooting improvements.
  Support Mellanox ConnectX-6 (Ethernet or InfiniBand).
  
  
  
  

• IBM Spectrum Scale management API changes

  None
  

• IBM Spectrum Scale GUI changes Created Files > Clustered Watch Folder page in the GUI to view the list of the clustered watch folders that are configured in the system. You can also view the details of each watch folder and the events that are raised against each record from the detailed view. To access the detailed view, select the watch folder for which you need the details and click View Details. In the Files > File Systems page, added the details such as whether the clustered watch is enabled at the file system level and the number of watched filesets under a file system. In the Files > Filesets page, added the details such as whether the clustered watch is enabled at the fileset level and the number of watched inodes.
• Installation toolkit changes

  
      Support for packages signed with a GPG (GNU Privacy Guard) key
      Enhanced handling of host entries in the /etc/hosts file. 
      Support for both FQDN and short name.
      Support for online rolling upgrade 
  

• NFS changes

  Client-specific statistics are supported.
      For the performance analysis of the CES NFS server, it is important to 
         understand the workload that is exerted by the NFS clients. This new 
         feature replaced dependency on customers to understand the client-side 
         workload. It provides the following client-specific statistics:
  
          client_io_ops - This statistics counting is enabled by default. 
             This statistics counting provides information on all I/O-specific 
             operations such as READ, WRITE of all supported NFS protocols 
             (NFSv3, NFSv4.0) exerted by the NFS client (client IP address). 
             This statistics helps to understand I/O workload exerted by a specific NFS client.
          client_all_ops - This statistics counting provides information on all 
             operations of NFS protocols such as NFSv3, NLM, NFSv4.0. This statistics 
             counting is disabled by default. You must enable it to extract the statistics. 
             This statistics helps to understand all workload exerted by the NFS client.
  
  DNS related stats can be captured as a part of the authentication statistics collection.
  
  Various improvements in metadata caching module (MDCACHE), which includes the directory listing area.

• IBM Spectrum Scale SMB changes

  
          Added the best practices for using SMB
  
          Currency: The SMB service has been upgraded.
  
          Recovery lock: The SMB clustering component now uses a global file 
            lock to maintain cluster integrity. The recovery lock is placed in 
            the cesroot as //smb/ctdb-recovery-lock and is 
            held by the ctdb services on one of the CES cluster nodes.
  
          File handles for Mac clients: Modern Mac OS clients have changed handling 
            FileID=0 or File_ids_off=yes in /etc/nsmb.conf. The SMB service now 
            returns file handles built upon the GPFS inode number, generation number, 
            and snapshot number to Mac clients instead of just 0. Thus the 
            “File_ids_off=yes” setting in /etc/nsmb.conf has to be removed.
  
          Error messages and trouble shooting procedures have been improved for SMB share modes.
  
  
  
  

• System Health changes

  
  New events added
      New events have been added to the following sections: For more information, see Events.
  
  New measurement options for mmhealth command
      The following measurement options have been added to the mmhealth thresholds add command:
  
      For more information, see mmhealth command and Use case 5 in Threshold monitoring use cases.
  
  Changes in performance metrics behavior
  

• Callhome

  None
  

• Security-Enhanced Linux (SELinux) changes

  IBM Spectrum Scale now runs on supported Red Hat Enterprise Linux operating 
  systems with Security-Enhanced Linux (SELinux) enforcing mode and targeted policies.
  

• New Commands

• New subroutines

  
      gpfs_getacl_fd()
      gpfs_putacl_fd()
  
  

• New Messages

  6027-1761, 6027-2413 and 6027-4210
  

• Changed commands

  
  
      mmafmconfig
      mmafmctl
      mmaudit
      mmchconfig
      mmchfileset
      mmkeyserv
      mmlsquota
      mmnfs
      mmwatch
      spectrumscale
  
  

• Features stabilized in Version 5.0.5

  
  FPO
  
  

• Features deprecated in Version 5.0.5

  
  Category                 Deprecated functionality                Recommended Action          
  
  Security                 The use of TLS 1.0 and 1.1 for          Upgrade to TLS 1.2 or later  
                           authorization within and between 
                           the IBM Spectrum Scale clusters 
                           (Security mode)
  
  GUI/REST API             The use of TLS 1.0 and 1.1 for          Upgrade to TLS 1.2 or later 
                           authorization with the GUI/REST 
                           API server
  
  Cloud                    Storage Enabler for Containers (SEC)    Adopt the CSI driver. Note that we 
                                                                   plan to discontinue support for SEC 
                                                                   in the next release.
  
  Platforms                Encryption acceleration library         No functional impact: performance only 
                                                                   on Power7. If encryption performance 
                                                                   is critical, plan to migrate to newer 
                                                                   generations of Power systems. Note that 
                                                                   we plan to discontinue support for 
                                                                   CliC in the next release. 
  
  Platforms                Support for Power7                      Plan to migrate to newer generations 
                                                                   of Power systems.
  
  HDFS Transparency
  

• Features discontinued in Version 5.0.5

  Category                 Discontinued functionality                Recommended Action
  
  HDFS Transparency        Support for IBM BigInsights for           IBM BigInsights for Apache Hadoop is 
                           Apache Hadoop                             no longer supported by IBM. 
                                                                     Consequently, IBM Spectrum Scale no 
                                                                     longer supports the use of BigInsights 
                                                                     as a Hadoop connection. 
  
  Platforms                Windows 7 and Windows Server 2008 R2      Upgrade to a supported version of 
                                                                     Windows.