Meta Cache Distribution

Overview

This function displays the setting state of the automatic meta cache distribution and the location of the meta cache.

This function is displayed in a Unified Storage environment.

Caution

  • This function is not supported for the ETERNUS DX60 S5, the ETERNUS DX900 S5, the ETERNUS DX8100 S4/DX8900 S4, and the ETERNUS AF150 S3/AF250 S3/AF650 S3.

Note

  • A unified upgrade is necessary for a storage system that will be used in a Unified Storage environment if it was previously used in a SAN environment. Refer to the [Register Unified Storage License] function and the [Apply Controller Firmware] function for details. This function is added in the category after the unified upgrade is complete.

  • Manually performing a meta cache distribution is recommended. Refer to the [Initialize Meta Cache Distribution] function for details.

  • The meta cache distribution can be initialized automatically. Refer to the [Enable Automatic Meta Cache Distribution] function for details.

  • Automatic meta cache distribution can be disabled. Refer to the [Disable Automatic Meta Cache Distribution] function for details.

User Privileges

Availability of Executions in the Default Role

Default role Availability of executions
Monitor
Admin
StorageAdmin
AccountAdmin  
SecurityAdmin
Maintainer

Refer to User Roles and Policies for details on the policies and roles.

Display Contents

Automatic Meta Cache Distribution

Item Description

Automatic Meta Cache Distribution

Whether the automatic meta cache distribution is enabled or not is displayed.

If this item is "Enable", the meta cache distribution is checked for all registered NAS volumes in the storage system for the times described below. If "Current Location" and "Initial Location" do not match, a redistribution is performed.

  • When the NAS Engine is started

  • Every hour on the half hour

Caution

  • To redistribute the meta cache, using the [Initialize Meta Cache Distribution] function is recommended. If the [Enable Automatic Meta Cache Distribution] function is used, a meta cache redistribution is performed every hour on the half hour regardless of the host I/O and the processes that are related to NAS may be delayed for a maximum of two minutes.

Meta Cache Distribution Information

Item Description

Volume No.

The NAS volume number is displayed.

Volume Name

The NAS volume name is displayed.

Current Location

The current meta cache distribution is displayed.

When the distribution information cannot be obtained, a "-" (hyphen) is displayed.

CM#0

CM#1

Initial Location

The location of the meta cache when the NAS volume was created is displayed.

When the distribution information cannot be obtained, a "-" (hyphen) is displayed.

CM#0

CM#1