ZFS is Out of Space

So, someone just came to you complaining that their ZFS is out of space. Here is a nifty utility that you can use to bump the ZFS up.

First, make sure /usr/sbin/ is in your $PATH variable in USS. You can easily do this by adding it to your .profile in USS. Here is an example:
```
 PATH=/usr/sbin:$PATH
 echo $PATH
```

Next, allocate and format the new ZFS to the size you need.

 //ZFSALLOC JOB NOTIFY=&SYSUID,CLASS=1                                               
 /*JOBPARM S=*                                           
 //********************************************************************* 
 //* Allocate ZFS.                                                     * 
 //* Instructions:                                                     * 
 //*   1. Change @ZFS_DSN@ to the ZFS dataset name.                    * 
 //*   2. Change @OWNER@   to the userid in USS to be owner.           * 
 //*   3. Change @GROUP@   to the group  in USS to be owner. (DEFLT1)  * 
 //*   4. Submit and grab hold of somethin'.                           * 
 //********************************************************************* 
 //STEP01   EXEC   PGM=IDCAMS                                            
 //SYSPRINT DD     SYSOUT=H                                              
 //SYSUDUMP DD     SYSOUT=H 
 //AMSDUMP  DD     SYSOUT=H                                              
 //SYSIN    DD     *                                                     
   DEFINE CLUSTER(                    
             NAME(@ZFS_DSN@) -
             VOLUMES(ZF8D1D) -
             DATACLAS(DCZFS) -
             LINEAR -
             MEGABYTES(2000,100) -
             SHAREOPTIONS(3,3) -
                 )
 /*                                                                      
 //IF1      IF STEP01.RC=0 THEN                                          
 //********************************************************************* 
 //* Format the new ZFS.                                               * 
 //********************************************************************* 
 //ZFSNEWA  EXEC   PGM=IOEAGFMT,REGION=0M,                               
 //      PARM=('-aggregate @ZFS_DSN@                                    
 //              -compat -owner @OWNER@ -group @GROUP@')                 
 //SYSPRINT DD   SYSOUT=H                                                
 //STDOUT   DD   SYSOUT=H                                                
 //STDERR   DD   SYSOUT=H              
 //SYSUDUMP DD   SYSOUT=H                                                
 //CEEDUMP  DD   SYSOUT=H                                                
 //         ENDIF                                                        
 /*

Next, instead of playing games with ZFS swapping and copying, etc… just run this job:

 //ZFSBIGGR JOB NOTIFY=&SYSUID,CLASS=1                                              
 /*JOBPARM S=*                                                          
 //*********************************************************************
 //* Swap-a-roo a ZFS file system to make it bigger (or smaller).      *
 //* ----------------------------------------------------------------- *
 //* Instructions:                                                     *
 //*   1. Separate from this job, allocate your NEW ZFS.               *
 //*   2. Validate your source ZFS is mounted.                         *
 //*   3. Change @S_DSN@ to the source ZFS dataset name.               *
 //*   4. Submit.                                                      *
 //* ----------------------------------------------------------------- *
 //*  This JCL will run the BPXWMIGF (xFS to zFS migration)            *
 //*  command.  This job just initiates the request, look              *
 //*  in SYSLOG for the BPXU008I messagefor completion or              *
 //*  use TSO BPXWMIGF zfsname to check status                         *
 //*  or                                                               *
 //*  bpxwmigf -query                                                  *
 //*                                                                   *
 //*  -The source zFS must be mounted.                                 *
 //*  -The job needs to run on the system where the source zFS         *
 //*    is mounted.                                                    *
 //*  -The new zFS must be pre-allocated.                              *
 //*  -The source will be renamed to .OLD and the target will          *
 //*    be renamed to the source.                                      *
 //*  set -o xtrace will echo the command                              *
 //*********************************************************************
 //STEP1   EXEC  PGM=BPXBATCH,REGION=0M                                 
 //STDOUT  DD  SYSOUT=*                                                 
 //STDERR  DD  SYSOUT=*
 //STDPARM DD  *                                                        
 SH set -o xtrace &&                                                    
       bpxwmigf -source @S_DSN@ \
   -target @S_DSN@.new \
   -trename \
   -srename @S_DSN@.old \
   -swap                        
 //*    