Operations you can perform with FlexCache volumes include creating them, displaying their status and free space, configuring the Autogrow capability, and flushing files that they are caching.
Creating FlexCache volumes
You use FlexCache volumes to speed access to remote data, or to offload traffic from heavily accessed volumes.
Displaying free space for FlexCache volumes
When you use the df command on the caching storage system, you display the disk free space for the origin volume, rather than the local caching volume. You can display the disk free space for the local caching volume by using the -L option for the df command.
Configuring the FlexCache Autogrow capability
With the Autogrow capability enabled, Data ONTAP increases the size of a FlexCache volume when the volume starts to fill up. The Autogrow capability is enabled and disabled per FlexCache volume, and is enabled by default on new FlexCache volumes.
Flushing files from FlexCache volumes
If you know that a specific file has changed on the origin volume and you want to flush it from your FlexCache volume before it is accessed, you can use the flexcache eject command. For more information about this command, see the na_flexcache(1) man page.
Displaying FlexCache client statistics
You can use client statistics to see how many operations are being served by the FlexCache volume rather than the origin system. A large number of cache misses might indicate that the FlexCache volume is too small and data is being discarded and fetched again later.
Displaying FlexCache server statistics
If you are using the LAN deployment to offload an overloaded volume, you can use server statistics to get information about the origin system and ensure that the load is evenly distributed among the caching volumes.
Displaying FlexCache status
You display the status for a FlexCache volume using the vol status command. If your FlexCache volume has a problem, a FlexCache status is displayed as the last line of the volume status output. If the status of the FlexCache is normal, no FlexCache status is displayed.