GPFS: Administration and Programming Reference - IRA Home

GPFS Linux installations require a set of kernel extensions be built to match a customer’s specific
hardware, Linux distribution and kernel . Prior to GPFS V3.1, this was a manual operation (see the
General Parallel File System: Concepts, Planning, and Installation Guide and search on The GPFS
portability layer). In addition to the manual method, there now exists an autoconfiguration tool to
query your system configuration and generate a working configuration file.
– The use of a single port removing conflicts with existing network services.
As of November 2004, port number 1191 was officially registered with InterNet Assigned Numbers
Authority (IANA) for handling GPFS-specific traffic. With this release, all GPFS-related traffic has
been consolidated on port number 1191.
– Improved usability and command consistency by providing the -N flag to indicate which nodes are to
participate in processing the command. Node classes may also be used to specify nodes.
Commands using this new option are:
- mmadddisk
- mmaddnode
- mmchcluster
- mmchconfig
- mmchdisk
- mmcrcluster
- mmdeldisk
- mmdelnsd
- mmdelnode
- mmfsck
- mmgetstate
- mmmount
- mmrestripefs
- mmrpldisk
- mmshutdown
- mmstartup
- mmumount
– The gpfs_getacl() and gpfs_putacl() subroutines have been expanded to allow an externalized
version of the ACL structure to be passed between an application and GPFS.
Please see the GPFS FAQ for information on the latest support for GPFS interoperability.
– The gpfs_quotactl() subroutine has been added to allow manipulating disk quotas on file systems.
v Changed information:
– Improved quorum semantics when utilizing node quorum with tiebreaker disks. The maximum
number of quorum nodes has been increased from two to eight.
– Enhanced quota information in support of filesets.
– Enhancements to the support of NFS V4 on AIX that includes:
- Enhanced ACL behavior:
v UNIX ®
permissions on an object no longer include a DELETE specification in either the allow
or deny entries.
v DELETE is permitted if the user has either DELETE on the object or DELETE CHILD on the
parent.
– Performance and security enhancements to the mmauth command:
- You may experience performance improvements as GPFS now uses a multithreaded receiver for
authentication, encryption and decryption.
- Multiple security levels, up to one for each authorized cluster, may be specified by the cluster
granting access.
Summary of changes xv