Viewing Storage Object Data in the Investigator › How to Create an Alert to Monitor Storage Group Space Usage › Storage Resource Objects › Storage Engine Information

Storage Engine Information

The Storage Engine Information object provides information about the storage engine (hosts) you have set up for CA Chorus for Storage Management. It provides storage engine identification, status, and statistical information.

When you select a row in this object the Details pane displays the row details in the following column group tabs:

Storage Engine Information

Provides identification information and status.

Query Statistics

Provides the high-level summary for all queries.

Storage Engine Query Statistics

Provides response summary for only the queries that are directed to the storage engine.

Hourly Query Distributions (Storage Engine)

Provides the number of queries per hour that is directed to the storage engine.

Hourly Query Distributions (All)

Provides the number of queries per hour for all queries.

When a user clicks an object in the user-interface, one or more queries are made to the data source to obtain the requested information. The queries are divided into the following types:

Constant Queries

These types of queries return the specified constant (the number 1 or a literal string, for example) in all rows for the appropriate column. These queries are sometimes used to find the number of rows in a requested object without having to transmit any data from the object.

Data Queries

These types of queries return rows of data from a requested object.

Metadata Queries

These types of queries return the attributes for an object, its fields, its actions (if any) and its related objects (if any).

Internal Queries

These types of queries return the status and statistics regarding each storage engine connection.

Note: To find out more about the columns and information displayed in the Storage Engine Information object, see the Storage Engine Information object help.

Examples of when to use this object.

• You open a storage object in the Investigator, and you receive a message that a storage engine connection is not available. The storage object does not display rows of data from the storage engine that is not available. Open the Storage Engine Information object and verify the status of the host which is not displaying data. If it has status not available, contact your system administrator to verify communication with and status of the storage engine. There could be different reasons for the not available status. A couple examples are as follows:
  • The storage engine task needs a restart.
  • The communication between the storage engine and CA Chorus is lost.
• You open a storage object, and you notice that it is taking an exceptionally long time to display the data. Open the Storage Engine Information object and review the response times. If the response time is much higher on one particular storage engine (host), ask your system administrator to verify that the storage engine has enough resources and that the communication link between the storage engine and CA Chorus is working properly.