GPFS: Administration and Programming Reference - IRA Home

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mmchattr Command -m MetadataReplicas Specifies how many copies of the file system’s metadata to create. Enter a value of 1 or 2, but not greater than the value of the MaxMetadataReplicas attribute of the file. -M MaxMetadataReplicas The maximum number of copies of indirect blocks for a file. Space is reserved in the inode for all possible copies of pointers to indirect blocks. Valid values are 1 and 2, but cannot be less than DefaultMetadataReplicas. The default is 1. -P DataPoolName Changes the file’s assigned storage pool to the specified DataPoolName. The caller must have superuser or root privileges to change the assigned storage pool. -r DataReplicas Specifies how many copies of the file data to create. Enter a value of 1 or 2, but not greater than the value of the MaxDataReplicas attribute of the file. -R MaxDataReplicas The maximum number of copies of data blocks for a file. Space is reserved in the inode and indirect blocks for all possible copies of pointers to data blocks. Valid values are 1 and 2 but cannot be less than DefaultDataReplicas. The default is 1. Exit status 0 Successful completion. nonzero A failure has occurred. Security You must have write access to the file to run the mmchattr command. You may issue the mmchattr command only from a node in the GPFS cluster where the file system is mounted. When considering data replication for files accessible to SANergy, see SANergy export considerations in General Parallel File System: Advanced Administration Guide. Examples 1. To change the metadata replication factor to 2 and the data replication factor to 2 for the project7.resource file in file system fs1, issue this command: mmchattr -m 2 -r 2 /fs1/project7.resource To confirm the change, issue this command: mmlsattr project7.resource The system displays information similar to: replication factors metadata(max) data(max) file [flags] ------------- --------- --------------- 2 ( 2) 2 ( 2) /fs1/project7.resource 2. Migrating data from one storage pool to another using the mmchattr command with the -I defer option, or the mmapplypolicy command with the -I defer option will cause the data to be ill-placed. This means that the storage pool assignment for the file has changed, but the file data has not yet been migrated to the assigned storage pool. The mmchattr -L command will show ill-placed flags on the files that are ill-placed. The mmrestripefs, or mmrestripefile command can be used to migrate data to the correct storage pool, and the ill-placed flag will be cleared. This is an example of an ill-placed file: mmlsattr -L file1 82 GPFS: Administration and Programming Reference
The system displays output similar to this: file name: file1 metadata replication: 1 max 2 data replication: 1 max 2 flags: illplaced storage pool name: sp1 fileset name: root snapshot name: See also “mmcrfs Command” on page 120 “mmlsattr Command” on page 196 “mmlsfs Command” on page 209 Location /usr/lpp/mmfs/bin mmchattr Command Chapter 8. GPFS commands 83
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General Parallel File System Admini
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Note: Before using this information
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Chapter 4. Managing disks . . . . .
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mmrestripefile Command . . . . . .
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viii GPFS: Administration and Progr
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x GPFS: Administration and Programm
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Table 1. Typographic conventions (c
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- The mmmount and mmumount commands
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- The local cluster no longer needs
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xviii GPFS: Administration and Prog
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2 GPFS: Administration and Programm
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Remote shell command: /usr/bin/rsh
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v A node being deleted cannot be th
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You may be able to tune your cluste
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The system displays information sim
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If it becomes necessary to stop GPF
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ecorded in the GPFS configuration f
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Checking and repairing a file syste
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-j scatter Block allocation type -D
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Restriping offers the opportunity t
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See the “mmdf Command” on page
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2. The TSM client code must be inst
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26 GPFS: Administration and Program
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gpfs3nsd 0903C1573F2AD7B6 /dev/sdb1
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12 % complete on Fri Feb 3 16:02:39
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Page 58 and 59: To disable quota management: 1. Iss
Page 60 and 61: During the normal operation of file
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Page 66 and 67: Each GPFS file or directory has an
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Page 80 and 81: Table 4. GPFS commands (continued)
Page 82 and 83: mmadddisk Command mmadddisk Command
Page 84 and 85: mmadddisk Command Note: Rebalancing
Page 86 and 87: mmaddnode Command Name mmaddnode Ad
Page 88 and 89: mmaddnode Command See also “mmchc
Page 90 and 91: mmapplypolicy Command how the mmapp
Page 92 and 93: mmapplypolicy Command MIGRATED /fs1
Page 94 and 95: mmauth Command delete Deletes a clu
Page 96 and 97: mmauth Command mmauth: Propagating
Page 98 and 99: mmbackup Command Name mmbackup - Ba
Page 100 and 101: mmbackup Command Tue Mar 18 14:03:2
Page 104 and 105: mmchcluster Command Name mmchcluste
Page 106 and 107: mmchcluster Command Security You mu
Page 108 and 109: mmchconfig Command Name mmchconfig
Page 110 and 111: mmchconfig Command dmapiMountTimeou
Page 112 and 113: mmchconfig Command and search for n
Page 114 and 115: mmchdisk Command Name mmchdisk - Ch
Page 116 and 117: mmchdisk Command resume Informs GPF
Page 118 and 119: mmcheckquota Command Name mmcheckqu
Page 120 and 121: mmcheckquota Command 55 % complete
Page 122 and 123: mmchfileset Command Examples This c
Page 124 and 125: mmchfs Command If your file system
Page 126 and 127: mmchfs Command When considering dat
Page 128 and 129: mmchmgr Command GPFS: 6027-628 Send
Page 130 and 131: mmchnsd Command Options NONE DiskNa
Page 132 and 133: mmchpolicy Command Name mmchpolicy
Page 134 and 135: mmcrcluster Command Name mmcrcluste
Page 136 and 137: mmcrcluster Command If your primary
Page 138 and 139: mmcrfileset Command Name mmcrfilese
Page 140 and 141: mmcrfs Command Name mmcrfs - Create
Page 142 and 143: mmcrfs Command Options other disk)
Page 144 and 145: mmcrfs Command -z {yes | no} Enable
Page 146 and 147: mmcrnsd Command Name mmcrnsd - Crea
Page 148 and 149: mmcrnsd Command Note: This name can
Page 150 and 151: 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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