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v A node being deleted cannot be the primary or backup NSD server for any disk in the GPFS cluster unless you intend to delete the entire cluster. Verify this by issuing the mmlsnsd command. If a node to be deleted is an NSD server for one or more disks, move the disks to nodes that will remain in the cluster and use the mmchnsd command to assign new NSD servers for those disks. v GPFS must be shut down on the nodes being deleted. Use the mmshutdown command. To delete the nodes listed in a file called nodes_to_delete, enter: mmdelnode -N /tmp/nodes_to_delete where nodes_to_delete contains the nodes k164n01 and k164n02. The system displays information similar to: Verifying GPFS is stopped on all affected nodes ... mmdelnode: Command successfully completed mmdelnode: 6027-1371 Propagating the cluster configuration data to all affected nodes. This is an asynchronous process. To confirm the deletion of the nodes, enter: mmlscluster The system displays information similar to: GPFS cluster information ======================== GPFS cluster name: cluster1.kgn.ibm.com GPFS cluster id: 680681562214606028 GPFS UID domain: cluster1.kgn.ibm.com Remote shell command: /usr/bin/rsh Remote file copy command: /usr/bin/rcp GPFS cluster configuration servers: ----------------------------------- Primary server: k164sn06.kgn.ibm.com Secondary server: k164n05.kgn.ibm.com Node Daemon node name IP address Admin node name Designation ------------------------------------------------------------------------------------- 1 k164n04.kgn.ibm.com 198.117.68.68 k164n04.kgn.ibm.com quorum 2 k164n05.kgn.ibm.com 198.117.68.69 k164n05.kgn.ibm.com quorum 3 k164n06.kgn.ibm.com 198.117.68.70 k164sn06.kgn.ibm.com quorum-manager See the “mmdelnode Command” on page 159 and the “mmlscluster Command” on page 198 for complete usage information. Exercise caution when shutting down GPFS on quorum nodes or deleting quorum nodes from the GPFS cluster. If the number of remaining quorum nodes falls below the requirement for a quorum, you will be unable to perform file system operations. See the General Parallel File System: Concepts, Planning, and Installation Guide and search on quorum. Changing the GPFS cluster configuration data Once your GPFS cluster has been configured (see the General Parallel File System: Concepts, Planning, and Installation Guide and the mmcrcluster command), you can change configuration attributes by issuing the mmchcluster or mmchconfig commands. Use the mmchcluster command to: v Change the name of the cluster. v Specify node interfaces to be used by the GPFS administration commands. 6 GPFS: Administration and Programming Reference
v Change the primary or secondary GPFS cluster configuration server nodes. The primary or secondary server may be changed to another node in the GPFS cluster. That node must be available for the command to be successful. Attention: If during the change to a new primary or secondary GPFS cluster configuration server, one or both of the old server nodes are down, it is imperative that you run the mmchcluster -p LATEST command as soon as the old servers are brought back online. Failure to do so may lead to disruption in GPFS operations. v Synchronize the primary GPFS cluster configuration server node. If an invocation of the mmchcluster command fails, you will be prompted to reissue the command and specify LATEST on the -p option to synchronize all of the nodes in the GPFS cluster. Synchronization instructs all nodes in the GPFS cluster to use the most recently specified primary GPFS cluster configuration server. v Change the remote shell and remote file copy programs to be used by the nodes in the cluster. These commands must adhere to the syntax forms of the rsh and rcp commands, but may implement an alternate authentication mechanism. For example, to change the primary server for the GPFS cluster data, enter: mmchcluster -p k164n06 The system displays information similar to: mmchcluster -p k164n06 mmchcluster: Command successfully completed To confirm the change, enter: mmlscluster The system displays information similar to: GPFS cluster information ======================== GPFS cluster name: cluster1.kgn.ibm.com GPFS cluster id: 680681562214606028 GPFS UID domain: cluster1.kgn.ibm.com Remote shell command: /usr/bin/rsh Remote file copy command: /usr/bin/rcp GPFS cluster configuration servers: ----------------------------------- Primary server: k164sn06.kgn.ibm.com Secondary server: k164n05.kgn.ibm.com Node Daemon node name IP address Admin node name Designation ------------------------------------------------------------------------------------- 1 k164n04.kgn.ibm.com 198.117.68.68 k164n04.kgn.ibm.com quorum 2 k164n05.kgn.ibm.com 198.117.68.69 k164n05.kgn.ibm.com quorum 3 k164n06.kgn.ibm.com 198.117.68.70 k164sn06.kgn.ibm.com quorum-manager Attention: The mmchcluster command, when issued with either the -p or -s option, is designed to operate in an environment where the current primary and secondary GPFS cluster configuration servers are not available. As a result, the command can run without obtaining its regular serialization locks. To assure smooth transition to a new cluster configuration server, no other GPFS commands (mm... commands) should be running when the command is issued nor should any other command be issued until the mmchcluster command has successfully completed. See the “mmchcluster Command” on page 84 and the “mmlscluster Command” on page 198 for complete usage information. Chapter 2. Managing your GPFS cluster 7
Page 1: General Parallel File System Admini
Page 4 and 5: Note: Before using this information
Page 6 and 7: Chapter 4. Managing disks . . . . .
Page 8 and 9: mmrestripefile Command . . . . . .
Page 10 and 11: viii GPFS: Administration and Progr
Page 12 and 13: x GPFS: Administration and Programm
Page 14 and 15: Table 1. Typographic conventions (c
Page 16 and 17: - The mmmount and mmumount commands
Page 18 and 19: - The local cluster no longer needs
Page 20 and 21: xviii GPFS: Administration and Prog
Page 22 and 23: 2 GPFS: Administration and Programm
Page 24 and 25: Remote shell command: /usr/bin/rsh
Page 28 and 29: You may be able to tune your cluste
Page 30 and 31: The system displays information sim
Page 32 and 33: If it becomes necessary to stop GPF
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Page 36 and 37: Checking and repairing a file syste
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Page 40 and 41: Restriping offers the opportunity t
Page 42 and 43: See the “mmdf Command” on page
Page 44 and 45: 2. The TSM client code must be inst
Page 46 and 47: 26 GPFS: Administration and Program
Page 48 and 49: gpfs3nsd 0903C1573F2AD7B6 /dev/sdb1
Page 50 and 51: 12 % complete on Fri Feb 3 16:02:39
Page 52 and 53: suspended Indicates that data is to
Page 54 and 55: v You must identify the disks by th
Page 58 and 59: To disable quota management: 1. Iss
Page 60 and 61: During the normal operation of file
Page 62 and 63: The system displays output similar
Page 66 and 67: Each GPFS file or directory has an
Page 68 and 69: group::rwx- #effective:rw-- other::
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56 GPFS: Administration and Program
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58 GPFS: Administration and Program
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Table 4. GPFS commands (continued)
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mmadddisk Command mmadddisk Command
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mmadddisk Command Note: Rebalancing
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mmaddnode Command Name mmaddnode Ad
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mmaddnode Command See also “mmchc
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mmapplypolicy Command how the mmapp
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mmapplypolicy Command MIGRATED /fs1
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mmauth Command delete Deletes a clu
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mmauth Command mmauth: Propagating
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mmbackup Command Name mmbackup - Ba
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mmbackup Command Tue Mar 18 14:03:2
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mmchattr Command -m MetadataReplica
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mmchcluster Command Name mmchcluste
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mmchcluster Command Security You mu
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mmchconfig Command Name mmchconfig
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mmchconfig Command dmapiMountTimeou
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mmchconfig Command and search for n
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mmchdisk Command Name mmchdisk - Ch
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mmchdisk Command resume Informs GPF
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mmcheckquota Command Name mmcheckqu
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mmcheckquota Command 55 % complete
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mmchfileset Command Examples This c
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mmchfs Command If your file system
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mmchfs Command When considering dat
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mmchmgr Command GPFS: 6027-628 Send
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mmchnsd Command Options NONE DiskNa
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mmchpolicy Command Name mmchpolicy
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mmcrcluster Command Name mmcrcluste
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mmcrcluster Command If your primary
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mmcrfileset Command Name mmcrfilese
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mmcrfs Command Name mmcrfs - Create
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mmcrfs Command Options other disk)
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mmcrfs Command -z {yes | no} Enable
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mmcrnsd Command Name mmcrnsd - Crea
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mmcrnsd Command Note: This name can
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mmcrnsd Command Location /usr/lpp/m
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mmcrsnapshot Command Options NONE I
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mmcrvsd Command Name mmcrvsd - Crea
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mmcrvsd Command Options dataOnly In
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mmcrvsd Command See also “mmcrnsd
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mmdefedquota Command -u Specifies t
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mmdefquotaoff Command mmlsquota -d
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mmdefquotaon Command Security You m
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mmdefragfs Command Name mmdefragfs
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mmdefragfs Command gpfs60nsd 50688
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mmdelacl Command “mmputacl Comman
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mmdeldisk Command -F DescFile A fil
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mmdelfileset Command Name mmdelfile
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mmdelfileset Command 88 % complete
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mmdelfs Command Examples To delete
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mmdelnode Command Exit status 0 Suc
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mmdelnsd Command Options NONE Exit
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mmdelsnapshot Command When using th
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mmdf Command Exit status 0 Successf
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mmeditacl Command Name mmeditacl -
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mmeditacl Command Exit status 0 Suc
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mmedquota Command Group Name or gro
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mmexportfs Command Name mmexportfs
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mmfsck Command Name mmfsck - Checks
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mmfsck Command -n Specifies a no re
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mmfsck Command See also “mmcheckq
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mmfsctl Command v Modifications to
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mmfsctl Command lunA2 FlashCopy tar
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mmgetacl Command Parameters Filenam
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mmgetstate Command Name The mmgetst
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mmgetstate Command See also “mmch
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mmimportfs Command Parameters Devic
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mmlinkfileset Command Name mmlinkfi
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mmlsattr Command Name mmlsattr - Qu
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mmlscluster Command Name mmlscluste
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mmlsconfig Command Name mmlsconfig
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mmlsdisk Command Name mmlsdisk - Di
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mmlsdisk Command disk driver sector
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mmlsfileset Command Name mmlsfilese
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mmlsfileset Command 3. These comman
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mmlsfs Command -o Additional mount
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mmlsmgr Command Name mmlsmgr - Disp
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mmlsmount Command Name mmlsmount -
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mmlsnsd Command Name mmlsnsd - Disp
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mmlsnsd Command gpfs1 gpfs1nsd 0972
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mmlspolicy Command mmlspolicy fs2 -
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mmlsquota Command When a quota mana
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mmlssnapshot Command Name mmlssnaps
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mmmount Command Name mmmount - Moun
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mmpmon Command Name mmpmon - Manage
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mmpmon Command Use of the -i flag i
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mmpmon Command bytes written: 13946
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mmputacl Command Options -d Specifi
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mmquotaoff Command Name mmquotaoff
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mmquotaon Command Name mmquotaon -
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mmremotecluster Command Name mmremo
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mmremotecluster Command 2. This com
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mmremotefs Command Options -A {yes
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mmrepquota Command Name mmrepquota
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mmrepquota Command *** Report for U
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mmrestorefs Command Exit status 0 S
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mmrestripefile Command Name mmrestr
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mmrestripefile Command See also “
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mmrestripefs Command Assuming that
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mmrestripefs Command See also “mm
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mmrpldisk Command The disk descript
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mmrpldisk Command See also “mmadd
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mmsanrepairfs Command Repairing hyp
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mmshutdown Command When using the r
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mmsnapdir Command nonzero A failure
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mmstartup Command Name mmstartup -
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mmumount Command Name mmumount - Un
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mmunlinkfileset Command Name mmunli
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mmunlinkfileset Command See also
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Table 9. GPFS programming interface
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gpfs_close_inodescan() Subroutine N
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gpfs_cmp_fssnapid() Subroutine Loca
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gpfs_fcntl() Subroutine Name gpfs_f
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gpfs_fcntl() Subroutine fcntlArg.po
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gpfs_fputattrs() Subroutine Name gp
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gpfs_free_fssnaphandle() Subroutine
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gpfs_fssnap_id_t Structure Name gpf
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gpfs_get_fsname_from_fssnaphandle()
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gpfs_get_fssnaphandle_by_name() Sub
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gpfs_get_fssnaphandle_by_path() Sub
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gpfs_get_fssnapid_from_fssnaphandle
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gpfs_get_snapdirname() Subroutine N
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gpfs_get_snapname_from_fssnaphandle
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gpfs_getacl() Subroutine Error stat
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gpfs_iattr_t Structure /* don’t r
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gpfs_ifile_t Structure Name gpfs_if
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gpfs_igetattrs() Subroutine GPFS_E_
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gpfs_igetfilesetname() Subroutine E
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gpfs_igetstoragepool() Subroutine E
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gpfs_iopen() Subroutine Exceptions
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gpfs_iread() Subroutine EPERM The c
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gpfs_ireaddir() Subroutine Examples
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gpfs_ireadlink() Subroutine Locatio
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gpfs_ireadx() Subroutine offset On
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gpfs_next_inode() Subroutine Name g
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gpfs_opaque_acl_t Structure Name gp
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gpfs_open_inodescan() Subroutine No
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gpfs_prealloc() Subroutine Exceptio
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gpfs_putacl() Subroutine Exceptions
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gpfs_quotactl() Subroutine Q_SETQUO
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gpfs_quotaInfo_t Structure Name gpf
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gpfs_seek_inode() Subroutine Locati
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gpfsAccessRange_t Structure Name gp
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gpfsClearFileCache_t Structure Name
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gpfsDataShipMap_t Structure partiti
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gpfsDataShipStart_t Structure flag
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gpfsDataShipStop_t Structure Name g
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gpfsFreeRange_t Structure Name gpfs
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gpfsGetReplication_t Structure Name
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gpfsGetSnapshotName_t Structure Nam
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gpfsMultipleAccessRange_t Structure
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gpfsRestripeData_t Structure Name g
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gpfsSetReplication_t Structure rese
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366 GPFS: Administration and Progra
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mmsdrbackup User exit mmsdrbackup U
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syncfsconfig User exit Name syncfsc
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GPFS exceptions and limitations to
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2455 South Road, Poughkeepsie, NY 1
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metadataOnly Indicates that the dis
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v manager | client - Indicates whet
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v For AIX nodes, see Installing the
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RPM at www.rpm.org/ The Internet En
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commands (continued) mmchfileset 10
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file systems (continued) creating 1
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mmchattr 19, 81 mmchcluster 6, 84 m
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setting access control lists 46 sna
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