Monitoring prefetch

You can display the status of an AFM prefetch request by running the mmafmctl prefetch command without the list-file option.

For example, for file system gpfs1 and fileset iw_1, run the following command:

#  mmafmctl gpfs1  prefetch -j iw_1

Fileset Name    Async Read (Pending) Async Read (Failed) Async Read (Already Cached) Async Read(Total)
Async Read (Data in Bytes)
------------    --------------------------------------   ------------------ ------------------------
  iw_1            11              0              0                    11                 0

This output displays that there are 11 inodes that must be prefetched Async Read (Pending). When the job has completed, the status command displays:

#  mmafmctl gpfs1  prefetch -j iw_1
 Fileset Name    Async Read (Pending) Async Read (Failed) Async Read (Already Cached) Async Read(Total)
 Async Read (Data in Bytes)
 ------------    --------------------------------------  ------------------ ------------------------
  iw_1            0                   0                    10                           11