Converting multiple Storage Checkpoints


Converting multiple Storage Checkpoints
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You can convert Storage Checkpoints to nodata Storage Checkpoints when dealing with older Storage Checkpoints on the same file system.

To convert multiple Storage Checkpoints

Create a file system and mount it on /mnt0:

# mkfs -t vxfs /dev/vx/rdsk/dg1/test0
version 10 layout
134217728 sectors, 67108864 blocks of size 1024, log size 65536 blocks
rcq size 4096 blocks
largefiles supported
maxlink    supported 
# mount -t vxfs /dev/vx/dsk/dg1/test0 /mnt0

Create four data Storage Checkpoints on this file system, note the order of creation, and list them:

# fsckptadm create oldest /mnt0
# fsckptadm create older /mnt0
# fsckptadm create old /mnt0
# fsckptadm create latest /mnt0
# fsckptadm list /mnt0
  /mnt0
  latest:
    ctime                =  Mon 26 Jul 11:56:55 2004
    mtime                =  Mon 26 Jul 11:56:55 2004
    flags                =  largefiles
  old:
    ctime                =  Mon 26 Jul 11:56:51 2004
    mtime                =  Mon 26 Jul 11:56:51 2004
    flags                =  largefiles
  older:
    ctime                =   Mon 26 Jul 11:56:46 2004
    mtime                =  Mon 26 Jul 11:56:46 2004
    flags                =  largefiles
  oldest:
    ctime                =  Mon 26 Jul 11:56:41 2004
    mtime                =  Mon 26 Jul 11:56:41 2004
    flags                =  largefiles

Try to convert synchronously the latest Storage Checkpoint to a nodata Storage Checkpoint. The attempt will fail because the Storage Checkpoints older than the latest Storage Checkpoint are data Storage Checkpoints, namely the Storage Checkpoints old, older, and oldest:
```
# fsckptadm -s set nodata latest /mnt0
UX:vxfs fsckptadm: ERROR: V-3-24632: Storage Checkpoint 
set failed on latest.  File exists (17)
```
You can instead convert the latest Storage Checkpoint to a nodata Storage Checkpoint in a delayed or asynchronous manner.
```
# fsckptadm set nodata latest /mnt0
```

List the Storage Checkpoints, as in the following example. You will see that the latest Storage Checkpoint is marked for conversion in the future.

# fsckptadm list /mnt0
  /mnt0
  latest:
    ctime                = Mon 26 Jul 11:56:55 2004
    mtime                = Mon 26 Jul 11:56:55
    flags                = nodata, largefiles, delayed
  old:
    ctime                = Mon 26 Jul 11:56:51 2004
    mtime                = Mon 26 Jul 11:56:51 2004
    flags                = largefiles
  older:
    ctime                = Mon 26 Jul 11:56:46 2004
    mtime                = Mon 26 Jul 11:56:46 2004
    flags                = largefiles
  oldest:
    ctime                = Mon 26 Jul 11:56:41 2004
    mtime                = Mon 26 Jul 11:56:41 2004
    flags                = largefiles

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Showing the difference between a data and a nodata Storage Checkpoint	Home	Creating a delayed nodata Storage Checkpoint