Changing SmartIO mode

Last published : Jul 06, 2026
For a VxFS cache area, the caching mode determines what kind of caching is performed for the specified mount point. The mode can be nocache (displayed as avoid cache on the Management Server Console), read, or writeback. The default mode is read.
A VxVM cache area only supports read mode.
The caching mode represents the highest level of caching that can be enabled for objects on the mount point. If you specify avoid cache mode, SmartIO caching is disabled for the mount point. You cannot enable SmartIO caching for any data objects in that mount point. You must remount the file system to enable caching.
Similarly, if you specify read mode, you cannot enable SmartIO writeback caching for any data objects in that mount point.
To perform this task, your user group must be assigned the Admin role on the host or the Server perspective. The permission on the host may be explicitly assigned or inherited from a parent organization.
To enable or disable SmartIO caching
  1. In the Management Server console, go to the Server perspective and expand Manage in the left pane.
  2. Do one of the following:
    • Expand Organization orUncategorized Hosts, and select the required host. Expland** Volumes to locate the required volume. Right-click the volume, and select Change SmartIO Mode**.
    • Expand Applications and expandDatabases to locate the database. Do one of the following:
      • Select Volumes. Right-click the required volume, and select** Change SmartIO Mode**.
      • Select Files. Right-click the required file, and select** Change SmartIO Mode**.
  3. In the Change SmartIO Mode panel, review the existing SmartIO mode of the selected database, volume, file or filesystem, and then select one of the following SmartIO modes, and then click OK :
    • Read : To enable caching for only reads.
    • Writeback To enable caching for both reads and writes, with the writes being periodically written back to the selected volume, file, or filesystem.
    • Avoid Cache : To disable caching for the the selected database, volume, file, or filesystem.
More Information
Creating a cache
Modifying a cache
Deleting a cache
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