VERITAS Storage Foundation 4.1 Intelligent Storage Provisioning Administrator's Guide

Creating a Shared Cache Volume and Preparing Space-Optimized Snapshots
80 VERITAS Storage Foundation ISP Administrator’s Guide
Growing and Shrinking a Cache
You can use the vxcache command to increase the size of the cache volume that is associated
with a cache object:
# vxcache [-g diskgroup] growcacheto cache_object size
For example, to increase the size of the cache volume associated with the cache, mycache, to
2GB, use the following command:
# vxcache -g mydg growcacheto mycache 2g
To grow a cache by a specified amount, use the following form of the command:
# vxcache [-g diskgroup] growcacheby cache_object size
For example, to increase the size of the cache, mycache, by 1GB, you would use the following
command:
# vxcache -g mydg growcacheby mycache 1g
You can similarly use the shrinkcacheby and shrinkcacheto operations to reduce the size
of a cache. See the vxcache(1M) manual page for more information.
Removing a Cache
To remove a cache completely, including the cache object, its cache volume and all
space-optimized snapshots that use the cache:
1. Run the following command to find out the names of the top-level snapshot volumes that are
configured on the cache object:
# vxprint -g diskgroup -vne \
"v_plex.pl_subdisk.sd_dm_name ~ /cache_object/"
where cache_object is the name of the cache object.
2. Remove all the top-level snapshots and their dependent snapshots (this can be done with a
single command):
# vxedit -g diskgroup -r rm snapvol ...
where snapvol is the name of a top-level snapshot volume.
3. Stop the cache object:
# vxcache -g diskgroup stop cache_object
4. Finally, remove the cache object and its cache volume:
# vxedit -g diskgroup -r rm cache_object