In general, the ‘isi writable snapshots’ CLI syntax looks and feels similar to regular, read-only snapshots under OneFS. The currently available writable snapshots on a cluster can be easily viewed from the CLI with the ‘isi snapshot writable list’ command. For example:

# isi snapshot writable list

Path              Src Path        Src Snapshot

----------------------------------------------

/ifs/test/wsnap1  /ifs/test/prod  prod1

/ifs/test/wsnap2  /ifs/test/snap2 s73736

----------------------------------------------

The properties of a particular writable snapshot, including both its logical and physical size, can be viewed using the ‘isi snapshot writable view’ CLI command. For example:

# isi snapshot writable view /ifs/test/wsnap1

         Path: /ifs/test/wsnap1

     Src Path: /ifs/test/prod

 Src Snapshot: s73735

      Created: 2021-06-11T19:10:25

 Logical Size: 100.00

Physical Size: 32.00k

        State: active

OneFS SmartQuotas provides the capacity resource accounting for writable snapshots. The physical, logical, and application logical-space usage is retrieved from a directory quota on the writable snapshot’s root. This usage can be viewed directly from the OneFS CLI as follows:

# isi quota quotas list

Type      AppliesTo  Path             Snap  Hard  Soft  Adv  Used  Reduction  Efficiency

-----------------------------------------------------------------------------------------

directory DEFAULT    /ifs/test/wsnap1 No    -     -     -    76.00 -          0.00 : 1

-----------------------------------------------------------------------------------------

Or from the OneFS WebUI by going to File system > SmartQuotas > Quotas and usage:

Figure 3.   OneFS SmartQuotas WebUI usage dashboard