Readme and Release notes for release 5.0.2.0 IBM Spectrum Scale 5.0.2.0 Spectrum_Scale_Advanced-5.0.2.0-ppc64LE-Linux Readme

Unless specifically noted otherwise, this history of problems fixed for IBM Spectrum Scale 5.0.x applies for all supported platforms.

Changes to the IBM Spectrum Scale 5.0.2.0 include the following:

• AFM and AFM DR-related changes

      •Enabled user-defined gateway node assignment to AFM and AFM DR filesets     by modifying afmHashVersion value to 5.    •Added new options to mmafmctl prefetch. For more information, see mmafmctl command.    •Add afmGateway to mmchfileset. For more information, see mmchfileset command.    •Read-Only NFS export supported for AFM RO mode filesets.    •Disabled prefetch recovery    •Disabled gateway node queue transfer on AFM and AFM DR filesets 

• Authentication-related changes

      --ks-admin-pwd and --ks-swift-pwd removed from mmuserauth 

• Big data and analytics changes

    Changes in Mpack version 2.4.2.6       •HDP 2.6.5 is supported.       •Mpack installation resumes from the point of failure when the installation is re-run.       •The Collect Snap Data action in the IBM Spectrum Scale service in the Ambari GUI can capture           the Ambari agents' logs into a tar package under the /var/log/ambari.gpfs.snap* directory.       •Use cases where the Ambari server and the GPFS™ Master are co-located on the same           host but are configured with multiple IP addresses are handled within the IBM           Spectrum Scale service installation.       •On starting IBM Spectrum Scale from Ambari, if a new kernel version is detected on the IBM           Spectrum Scale node, the GPFS portability layer is automatically rebuilt on that node.       •On deploying the IBM Spectrum Scale service, the Ambari server restart is not required.           However, the Ambari server restart is still required when executing the           Service Action > Integrate Transparency or Unintegrate Transparency from the Ambari UI.  

• Cloud services changes

      •Support for RHEL 7.4 and 7.5 on both Power® and x86 machines.    •Support for Openstack Swift 2.13, IBM Cloud Object Storage 3.13.4.40, and Swift3 2.13 

• File system core improvements

     The GPFS portability layer (GPL) can be rebuilt automatically.      For more information, see the entry Installation improvements later in this topic.    File system maintenance mode      Added information about the new file system maintenance mode and added the new parameter        to the mmchfs, mmcrfs, and mmlsfs commands    The maxActiveIallocSegs attribute improves the performance of deletes and unlinks      The maxActiveIallocSegs attribute of the mmchconfig command can significantly improve      performance when multiple threads or processes on multiple nodes are concurrently      deleting or unlinking files in different subdirectories of the same file directory.    The mmnetverify command checks the connectivity of remote clusters      The mmnetverify command checks remote clusters for host-name resolution, network      connectivity via ping, and GPFS daemon connectivity. It checks known remote clusters      from the mmsdrfs file and can also check remote clusters that are specified      on the command line. For more information, see mmnetverify command.    Two features cope with long I/O waits on internal disks (disks attached to a single node)      •The diskIOHang callback event allows you to add notification and data collection       scripts to analyze the cause of a local I/O request that has been pending in       the node kernel for more than 5 minutes. For more information, see mmaddcallback command.      •The panicOnIOHang attribute controls whether the GPFS daemon panics the node kernel       when a local I/O request has been pending in the kernel for more than five minute  

• File audit logging updates

       •Listing or viewing the contents of directories within file audit logging enabled file systems          will produce OPEN and CLOSE events in the audit logs     •Added option to enable and disable file audit logging from the IBM Spectrum Scale          management GUI. You can enable file audit logging at the file system level          while creating or modifying a file system from the Files >  File Systems page  

• IBM Spectrum Scale management API changes

      •PUT /filesystems/{filesystemName}/audit/enable    •PUT /filesystems/{filesystemName}/audit/disable    •GET: /smb/shares/{shareName}/acl    •GET: /smb/shares/{shareName}/acl/{name}    •DELETE: /smb/shares/{shareName}/acl    •DELETE: /smb/shares/{shareName}/acl/{name}  

• IBM Spectrum Scale GUI changes

      •Added options to create and manage node classes. The two types of node classes that can be       defined in the IBM Spectrum Scale system are system node classes and user-defined node classes.       The system node classes are hard-coded but you can create user-defined node classes by using       the Nodes >  Node Classes >  Create Node Class option.    •Added option to enable and disable file audit logging. File audit logging captures file operations       on a file system and logs them to a retention enabled fileset. You can enable file audit logging       at the file system level while creating or modifying a file system from the Files >  File Systems page.    •Added option to configure automatic assignment of certain sensors to a single node, in       the Services >  Performance Monitoring >  Sensors page. A single node is automatically selected by the       system to run the GPFSFilesetQuota, GPFSFileset, GPFSPool, and GPFSDiskCap sensors.    •Improved remote cluster monitoring options capabilities.    •Introduced an integrated view of GUI services and GUI user management in the Services >  GUI page.    Removed the GUI Users and GUI Access pages from the Access menu and integrated the GUI user management       features in the Services >  GUI page. The GUI also logs out the users if the administrator changes       the user role or expire the password of the currently logged in user. For more information, see GUI.    •Added option to configure an external authentication method to manage the GUI user access in the       Services >  GUI page.    •Improved filtering and listing of events. Added graphical view of events reported against each component       in the Monitoring >  Events page. Clicking on the graph displays only the relevant events in the       grid view. Removed the Unread Events filter option and introduced Current State and Notices filter options.    •Improved health status monitoring of CES IPs. Renamed Services >  CES Network to Services >  CES Network       and CES IPs. The Addresses section shows the health status of the CES IP component. It also shows       the preferred nodes and non-hostable nodes if Node Affinity is selected as the IP address distribution method.    •Introduced a What's new window to highlight the changes made to the IBM Spectrum Scale GUI in a release.       When the user launches the GUI for the first time after installing or upgrading to the latest version,       the GUI users can see the list of GUI changes made in that release  

• Installation toolkit changes

      •Support for IBM Z (RHEL 7.x, SLES12.x, Ubuntu 16.04 and Ubuntu 18.04 on s390x)    •Support for offline upgrade of nodes or components while they are stopped or down    •Support for excluding nodes from an upgrade run    •Support for resuming an upgrade procedure after a failure    •Support for watch folder    •Enhancements in CES shared root creation and detection in config populate    •Upgraded bundled Chef package  

• Installation improvements

      The GPFS portability layer (GPL) can be rebuilt automatically.You can now configure a cluster       to automatically rebuild the GPL whenever a new level of the Linux kernel is installed or whenever       a new level of IBM Spectrum Scale is installed.  

• Object changes

      Added the new password-related parameter to the mmobj command.  

• IBM Spectrum Scale SMB changes

      •Configurations      ◦IBM Spectrum Scale does not change back the supported SMB protocol versions when they       are changed by a user.          ◾No longer force SMB2 for 'server min protol' in registry template.          ◾ No longer force SMB3 for 'server max protol' in registry template.     •Security      ◦Local user enumeration without credentials has been disabled by setting 'restrict       anonymous = 2' by default     •Stability enhancements      ◦The load on the idmap cache has been reduced by          ◾Removing calls to gencache_stabilize() in net utility and on smbd server exit          ◾adding an additional cache layer in memory so that the performance of workloads           involving many idmap lookups (with hide unreadable, for example) should improve           and timeouts during idmap cache access avoided.          ◾More graceful behavior of CTDB in out-of-memory situations (avoid crash, going           unhealthy, log memory usage data).          ◾Speed up wbinfo -p (the command for local winbind monitoring) to minimize the           likelihood of winbindd monitor timeouts and resulting fail-overs.     •Ubuntu enhancements      ◦As a consequence of the system library dependencies, GPFS SMB on Ubuntu now uses       heimdal libraries for Kerberos to avoid linking against two Kerberos libraries.      ◦Added support for OpenSSL 1.1.0 to allow GPFS SMB build on Ubuntu 18.04      ◦Fixed SMB packages dependencies on Debian to allow install with IBM Spectrum Scale 4.2.3.     •Scalability      ◦For a huge number of open files, the responses to MMC request from listing open files can       time out. To speed up file listing, two new options are introduced: srvsvc:file enum       count locks = false and srvsvc : file enum check stale = false.     •Usability      ◦Removed the wrong "malloc fail" error messages and fixed error messages during charset conversion.      ◦Added the close-file function to smbcontrol command to allow closing files without having to use the MMC.      ◦Adjusted debug level when get_winattrs returns EBADF to remove warning "Getting winattrs       failed for ..: Bad file descriptor"     •GPFS SMB version enhanced from 4.6.14_gpfs_36 tp gpfs_50-1 4.6.15_gpfs_49-1     •Miscellaneous      ◦Cache dfree information based on query path.      ◦Fix Windows Quota report issue: Fix keep_old_entries logic for older kerberos libraries.      ◦Update SELinux policy module for postfix. to avoid SELinux warnings       /usr/libexec/postfix/local from getattr      ◦Add TasksMax option to smbd systemd service file for SLES12 and Ubuntu to avoid the OS to       prevent forks on new SMB connections as the default is too small      ◦Restore Samba's pre 4.6.9 behavior to implicitly set SMB_ACE4_SYNCHRONIZE on NFSv4 ACLs       - more strict ACLs checks has broken downwards compatibility      ◦Fix reporting wrong session times for stale connections in the MMC.