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zFS Version 1.5 Aggregate and Extended (v5) Directory Experience Part4

By Lora Milczewski posted Wed March 25, 2020 12:09 PM

  


Convert a Version 1.4 Aggregate and a v4 Directory Using zfsadm convert -path

We used the zfsadm convert –path on a mounted version 1.4 aggregate to convert a directory to an extended (v5) directory. This converted the aggregate to a version 1.5 aggregate and converted the directory indicated in the -path to an extended (v5) directory.

We mounted a version 1.4 aggregate.


$ mount -t zfs -f OMVSSPN.PET3.ZFS.FS /pet3


Using zfsadm fileinfo, we see that the directory is a version v4.


$ zfsadm fileinfo -path /pet

  path: /pet                                                         

  ***  global data  ***                                            

  fid                   83,1         anode                 701,5052

  length                8192         format                BLOCKED

  1K blocks             8            permissions           755    

  uid,gid               0,0          access acl            0,0    

  dir model acl         0,0          file model acl        0,0    

  user audit            F,F,F        auditor audit         N,N,N  

  set sticky,uid,gid    0,0,0        seclabel              none   

  object type           DIR          object linkcount      11     

  object genvalue       0x00000000   dir version           4      

  dir name count        na           dir data version      9      

  dir tree status       na           dir conversion        na     

  file format bits      na,na,na     file charset id       na     

  file cver             na           charspec major,minor  na     

  direct blocks         0x0000585D                                  

  indirect blocks       none                                        

  mtime      Jul 8 13:26:53 2013  atime       Jul 21 18:57:59 2013

  ctime      Jul 8 13:26:53 2013  create time Jul 24 13:56:01 2008

  reftime    none

 

Using zfsadm convert –path we converted the /pet3 directory to an extended (v5) directory.

 

$ zfsadm convert -path /pet3

IOEZ00791I Successfully converted directory /pet3 to version 5 format.

 

Using the zfsadm fileinfo command we see that the /pet3 directory was converted to an extended (v5) directory, and the aggregate was converted to version 1.5. The other v4 directories remained v4.

 

$ zfsadm fileinfo -path /pet3

  path: /pet3                                                        

  ***  global data  ***                                            

  fid                   1,1          anode                 79,516 

  length                8192         format                BLOCKED

  1K blocks             8            permissions           777    

  uid,gid               0,0          access acl            0,0    

  dir model acl         0,0          file model acl        0,0    

  user audit            F,F,F        auditor audit         N,N,N  

  set sticky,uid,gid    0,0,0        seclabel              none   

  object type           DIR          object linkcount      4      

  object genvalue       0x00000000   dir version           5      

  dir name count        6            dir data version      4      

  dir tree status       VALID        dir conversion        na     

  file format bits      na,na,na     file charset id       na     

  file cver             na           charspec major,minor  na     

  direct blocks         0x0000A710                                  

  indirect blocks       none                                        

  mtime      Jul 26 14:07:24 2013  atime       Jul 26 14:50:48 2013

  ctime      Jul 26 14:07:24 2013  create time Jul 12 14:34:46 2002

  reftime    none

 

Using the zfsadm aggrinfo command, with the –long option, we see that the aggregate was converted to version 1.5.

 

$ zfsadm aggrinfo -aggregate OMVSSPN.PET3.ZFS.FS -long

OMVSSPN.PET3.ZFS.FS (R/W COMP): 1960807 K free out of total 1961280 

version 1.5                                                         

auditfid E2E2F0F0 F7F909ED 0000                                     

sysplex-aware                                                       

       245100 free 8k blocks;         7 free 1K fragments         

          112 K log file;            56 K filesystem table        

          280 K bitmap file


Convert a Version 1.4 Aggregate on First Read-Write Using converttov5

A version 1.4 aggregate can be changed to a version 1.5 aggregate on the first primary read-write mount if IOEPRMxx option converttov5=on is set, or if the CONVERTTOV5 MOUNT PARM is specified. The default is off. The aggregate is changed to a version 1.5 aggregate and each existing directory is converted to an extended (v5) directory as it is referenced.

 

The CONVERTTOV5 or NOCONVERTTOV5 specifies whether a zFS read/write file system is assigned the converttov5 attribute. If it is assigned the converttov5 attribute and the aggregate is a version 1.5 aggregate, zFS automatically converts directories from v4 to extended (v5) as they are accessed. If the converttov5 attribute is assigned at primary mount time, a version 1.4 aggregate is changed to a version 1.5 aggregate. If automatic directory conversion for a directory fails, the conversion is not attempted again until the file system is unmounted and mounted again. The converttov5 attribute can also be assigned if the MOUNT option is not specified but the converttov5 specification in the IOEFSPRM file is on when the file system is mounted or remounted. The default is NOCONVERTTOV5. The CONVERTTOV5 parameter can also be assigned to a mounted zFS file system.

 

We mounted a version 1.4 aggregate as read/write (RDWR) with the CONVERTTOV5 mount parameter. This converted the aggregate to a version 1.5 aggregate.

 

MOUNT FILESYSTEM('OMVSSPN.VER14.TO.VER15.ZFS') TYPE(ZFS)

 MODE(RDWR) MOUNTPOINT('/zfspetmounts/ver14tover15')  

 PARM('CONVERTTOV5')

 

Since the file system was mounted with the CONVERTTOV5 mount parameter, it shows as a version 1.5 aggregate using the zfsadm aggrinfo with the –long option display.

 

$ zfsadm aggrinfo -aggregate OMVSSPN.VER14.TO.VER15.ZFS -long

OMVSSPN.VER14.TO.VER15.ZFS (R/W COMP): 1263 K free out of total 1440       

version 1.5                                                                

auditfid E2E2F0F0 F1F41A4E 0000                                            

sysplex-aware, converttov5                                                 

          157 free 8k blocks;         7 free 1K fragments                

          112 K log file;            16 K filesystem table               

            8 K bitmap file

 

Using the df and D OMVS commands we can see the CONVERTTOV5 mount parameter.

 

$ df -vkP  /zfspetmounts/ver14tover15

Filesystem        1024-blocks       Used Available Capacity Mounted on     

OMVSSPN.VER14.TO.VER15.ZFS 1440        177      1263      13% /zfspetmounts/ver14tover15

ZFS, Read/Write, Device:62948, ACLS=Y                                          

CONVERTTOV5                                                                    

File System Owner : J80        Automove=Y     Client=N                       

Filetag : T=off  codeset=0                                                    

Aggregate Name : OMVSSPN.VER14.TO.VER15.ZFS

 

d omvs,f,name='OMVSSPN.VER14.TO.VER15.ZFS'

BPXO045I 13.33.15 DISPLAY OMVS 951                                   

OMVS    0012 ACTIVE            OMVS=(00,J8)                        

TYPENAME  DEVICE ----------STATUS----------- MODE MOUNTED   LATCHES

ZFS        62948 ACTIVE                     RDWR 08/14/2013 L=1422

 NAME=OMVSSPN.VER14.TO.VER15.ZFS                  13.29.00   Q=1422

 PATH=/zfspetmounts/ver14tover15                                    

 MOUNT PARM=CONVERTTOV5                                             

 OWNER=J80     AUTOMOVE=Y CLIENT=N

 

We used zfsadm fileinfo to check the directories. Fileinfo accesses the v4 directories, and automatically converts them to extended (v5) directories.

 

$ zfsadm fileinfo -path /zfspetmounts/ver14tover15/origv14dir1

$ zfsadm fileinfo -path /zfspetmounts/ver14tover15/origv14dir2

$ zfsadm fileinfo -path /zfspetmounts/ver14tover15

 

With zfsadm fileinfo all show as extended (v5) directories.

 

...

object genvalue       0x00000000   dir version           5

...


Convert an Aggregate and All Directories Using IOEFSUTL

We converted a version 1.4 aggregate to a version 1.5 aggregate, converting all directories to extended (v5) directories using IOEFSUTL converttov5. This requires the file system to be unmounted and executed on z/OS V2R1.

 

We needed to ensure that the version 1.4 file system was unmounted.

 

UNMOUNT FILESYSTEM('OMVSSPT.VER.CONVERT.ZFS') IMMED

 

We executed a batch job to run IOEFSUTL converttov5. Here are Excerpts from the JCL.

 

//CONVERT EXEC PGM=IOEFSUTL,REGION=0M,                       

// PARM=('converttov5 -aggregate OMVSSPT.VER.CONVERT.ZFS')

 

Here is an example of the results.

 

IOEZ00559I zFS IOEFSUTL: Initializing z/OS   zFS                              

Version 02.01.00 Service Level z150127 - HZFS410.                              

Created on Fri Mar 1 10:21:13 EST 2013.                                        

Address space asid x44                                                         

IOEZ00760I No IOEZPRM DD specified. Parmlib search being used.                 

IOEZ00810I Successfully changed aggregate OMVSSPT.VER.CONVERT.ZFS to version 1.5.

IOEZ00800I Conversion has processed 7 of 7 objects in the anode table.         

IOEZ00803I 4 directories were found, 4 converted, 4 directory pages converted to 4 directory pages.

IOEZ00808I Successfully converted all directories in aggregate OMVSSPT.VER.CONVERT.ZFS to version 5.

 

Note: aggrversion_only was not defined, so all directories were converted to extended (v5) directories also.

 

We then mounted the file system and used zfsadm fileinfo and zfsadm aggrinfo with the –long option to see if it was converted to a version 1.5 aggregate and all the directories were converted to extended (v5) directories.

 

MOUNT FILESYSTEM('OMVSSPT.VER.CONVERT.ZFS') TYPE(ZFS)

 MODE(RDWR) MOUNTPOINT('/pet')

 

$ zfsadm fileinfo -path /pet

  path: /pet                

  ***  global data  ***                                            

  fid                   1,1          anode                 703,516

  length                8192         format                BLOCKED

  1K blocks             8            permissions           356    

  uid,gid               0,0          access acl            0,0    

  dir model acl         0,0          file model acl        0,0    

  user audit            F,F,F        auditor audit         N,N,N  

  set sticky,uid,gid    1,0,0        seclabel              none   

  object type           DIR          object linkcount      5      

  object genvalue       0x00000000   dir version           5      

  dir name count        5            dir data version      3      

  dir tree status       VALID        dir conversion        na     

  file format bits      na,na,na     file charset id       na     

  file cver             na           charspec major,minor  na     

  direct blocks         0x00001781                                  

  indirect blocks       none                                        

  mtime      Mar 18 13:47:07 2013  atime       Mar 18 13:48:07 2013

  ctime      Mar 18 13:47:07 2013  create time Mar 18 13:30:42 2013

  reftime    none                                                  

 

$ zfsadm fileinfo -path /pet/origv4dir

  path: /pet/origv4dir                                           

  ***  global data  ***                                           

  fid                   2,1          anode                 703,768

  length                8192         format                BLOCKED

  1K blocks             8            permissions           775   

  uid,gid               0,0          access acl            0,0   

  dir model acl         0,0          file model acl        0,0   

  user audit            F,F,F        auditor audit         N,N,N 

  set sticky,uid,gid    0,0,0        seclabel              none  

  object type           DIR          object linkcount      2     

  object genvalue       0x00000000   dir version           5     

  dir name count        2            dir data version      0     

  dir tree status       VALID        dir conversion        na    

  file format bits      na,na,na     file charset id       na    

  file cver             na           charspec major,minor  na    

  direct blocks         0x000018F9                                 

  indirect blocks       none                                       

  mtime      Mar 18 13:37:28 2013  atime       Mar 18 13:37:28 2013

  ctime      Mar 18 13:37:28 2013  create time Mar 18 13:37:28 2013

  reftime    none

 

$ zfsadm fileinfo -path /pet/dirfromz1when14

  path: /pet/dirfromz1when14                                      

  ***  global data  ***                                            

  fid                   4,1          anode                 703,1272

  length                8192         format                BLOCKED

  1K blocks             8            permissions           775    

  uid,gid               0,0          access acl            0,0    

  dir model acl         0,0          file model acl        0,0    

  user audit            F,F,F        auditor audit         N,N,N  

  set sticky,uid,gid    0,0,0        seclabel              none   

  object type           DIR          object linkcount      2      

  object genvalue       0x00000000   dir version           5      

  dir name count        3            dir data version      1      

  dir tree status       VALID        dir conversion        na     

  file format bits      na,na,na     file charset id       na     

  file cver             na           charspec major,minor  na     

  direct blocks         0x00001EDE                                  

  indirect blocks       none                                        

  mtime      Mar 18 13:47:29 2013  atime       Mar 18 13:48:23 2013

  ctime      Mar 18 13:47:29 2013  create time Mar 18 13:47:07 2013

  reftime    none                                                   

 

$ zfsadm aggrinfo -aggregate OMVSSPT.VER.CONVERT.ZFS -long

OMVSSPT.VER.CONVERT.ZFS (R/W COMP): 71175 K free out of total 72000     

version 1.5                                                             

auditfid D7F2E4E2 F6F11C30 0000                                         

sysplex-aware                                                           

         8896 free 8k blocks;         7 free 1K fragments             

          720 K log file;            40 K filesystem table            

           16 K bitmap file


Convert a v4 Directory Using Copy (cp)

We mounted a version 1.4 aggregate, converted it to a version 1.5 aggregate, and then used copy (cp) to create a copy of an existing v4 directory. It created the target directory as an extended (v5) directory.

Note: The move (mv) command does not create a new directory if the target is in the same parent directory and file system, thus the directory remains the same version.  If the target is in a different version 1.5 file system, and the directory is created as a result of the move, the v4 directory will be converted to an extended (v5) directory.

 

We mounted a version 1.4 aggregate.

 

$ mount -t zfs -f OMVSSPN.ZFSFMT.ZFS /mnt1

 

Using zfsadm aggrinfo, we see it is a version 1.4 aggregate.

 

$ zfsadm aggrinfo -aggr OMVSSPN.ZFSFMT.ZFS -long

OMVSSPN.ZFSFMT.ZFS (R/W COMP): 559 K free out of total 720                     

version 1.4                                                                    

auditfid E2E2F0F0 F1F70808 0000                                                

sysplex-aware                                                                  

           69 free 8k blocks;         7 free 1K fragments                    

          112 K log file;            16 K filesystem table                   

            8 K bitmap file                                                   

 

Using the zfsadm convert command we converted the aggregate to a version 1.5 aggregate and verified with zfsadm aggrinfo –long and zfsadm fileinfo.

 

$ zfsadm convert -aggrversion OMVSSPN.ZFSFMT.ZFS

IOEZ00810I Successfully changed aggregate OMVSSPN.ZFSFMT.ZFS to version 1.5.

 

$ zfsadm aggrinfo -aggr OMVSSPN.ZFSFMT.ZFS -long

OMVSSPN.ZFSFMT.ZFS (R/W COMP): 551 K free out of total 720                 

version 1.5                                                                

auditfid E2E2F0F0 F1F70808 0000                                            

sysplex-aware                                                              

           68 free 8k blocks;         7 free 1K fragments                

          112 K log file;            16 K filesystem table               

            8 K bitmap file                                               

 

Use zfsadm fileinfo to display the directory.

 

$ zfsadm fileinfo -path /mnt1/dir1

        

...

  object genvalue       0x00000000   dir version           4

...

 

We tried to convert by using the move (mv) command for a directory in the same parent directory and file system. However, this did not cause the directory to be converted to an extended (v5) directory.

 

$ mv /mnt1/dir1 /mnt1/dir2

                  

$ zfsadm fileinfo -path /mnt1/dir2

              

...

  object genvalue       0x00000000   dir version           4

...

 

We used copy (cp) to convert the target directory. This caused the target directory to be converted to an extended (v5) directory.

 

$ cp -r /mnt1/dir2 /mnt1/dir1

 

$ zfsadm fileinfo -path /mnt1/dir1

    

...

  object genvalue       0x00000000   dir version           5

...

 

We converted by using the move (mv) command with the source being a v4 directory and the target being a new directory in a different version 1.5 file system. This caused the source v4 directory to be converted to an extended (v5) directory at the target location.

With /mnt1/dir1 as a v4 directory and using a target directory in another version 1.5 file system that does not exist (/pet/dir1), we issued the following:

 

$ mv -r /mnt1/dir1 /pet3

                  

$ zfsadm fileinfo -path /pet3/dir1

 

...

  object genvalue       0x00000000   dir version           5

...

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