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Snapdrive for Unix

Estimating the storage space using a Snapshot copy

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The clone split estimation helps you to estimate the required storage space (in MB) using a Snapshot copy, when there is no clone available for a Snapshot copy in the storage system.

Steps

  1. Enter the following command to estimate the required storage space.

    snapdrive clone split estimate -snapname [long_snap_name] {-volclone|-lunclone}] [-v | -verbose]

The following example estimates the storage space to split a LUN clone using a Snapshot copy.

snapdrive clone split estimate -snapname f3050-220-112:/vol/vol_1:snap_1 -lunclone
Resource       Container  Required Available Storage
                          Space(MB)Space(MB) Status
f3050-220-112: f3050-220 	5120	   14078    AVAILABLE
/vol/vol_1:snap_1 -112:/vol/vol_1

The following example estimates the storage space to split a LUN clone using a Snapshot copy with the -fs option.

# snapdrive clone split estimate -fs /mnt/my_mnt1 -snapname f3050-220-112:/vol/vol_1:snap_1 -lunclone
Resource         Container Required Available Storage
                            Space(MB)Space(MB) Status
f3050-220-112:   f3050-220  4120     14078  AVAILABLE
/vol/vol_1:snap_1 -112:/vol/vol_1

The following example estimates the storage space to split a volume clone using a Snapshot copy with the -fs option.

# snapdrive clone split estimate -fs /mnt/fs1 -snapname f3050-220-112:/vol/vol_1:snap_1 -volclone
Resource      Container   Required Available Storage
                          Space(MB)Space(MB) Status
f3050-220-112:  f3050-220 54019   54517  AVAILABLE
/vol/vol0:snap_1 112:aggr0

The following example estimates the storage space to split a volume clone using a Snapshot copy.

# snapdrive clone split estimate -snapname f3050-220-112:/vol/vol_1:snap_1 -volclone
Resource      Container   Required Available Storage
                          Space(MB)Space(MB) Status
f3050-220-112:  f3050-220 54019    54517    AVAILABLE
/vol/vol0:snap_1 112:aggr0
Note

  • The "Resource" field contains the Snapshot copy name, if the clone split estimate is done for a Snapshot copy.

  • If you provide any dead file specification along with the Snapshot copy with -lunclone option, the "Required Space" shows as 0.

  • The LUN clone split estimation using Snapshot is available only for Snapshot copies that are created from SnapDrive 4.2 for UNIX and later.