HP StoreAll Storage - Manual (Page 217)

15 Express Query
Express Query provides a per-file system database of system and custom metadata, and audit
histories of system and file activity. When Express Query is enabled on the file system, you can
manage the metadata service, configure auditing, create reports from the audit history, assign
custom metadata and certain system metadata to files and directories, and query for selected
metadata from files.
NOTE: Express Query can only be enabled on file systems which have Data Retention enabled.
Express Query provides the following components:
Where to find more information Brief Overview Component
“Managing the metadata service”
(page 217) The processes that manage the set of
per-file system metadata databases, Metadata Service
including auditing of file changes and
accessing the database in response
to REST API requests.
“Managing auditing” (page 222) Auditing lets you configure what
system and file changes go into the Auditing
Express Query database and create
reports of selected parts of the audit
history from the database.
“HTTP-REST API file-compatible mode
shares” (page 152) The StoreAll REST API share in
file-compatible mode provides StoreAll REST API in File Compatibility
mode
programmatic access to user-stored
files and their metadata. The metadata
is stored on the HP StoreAll Express
Query database in the StoreAll cluster
and provides fast query access to
metadata without scanning the file
system.
IMPORTANT: Express Query cannot
be performed on StoreAll REST API in
object mode
Managing the metadata service
The metadata service includes the database management processes, as well as the processes that
watch for state changes and log the associated metadata in the Express Query database. The
service is controlled with the ibrix_archiving command. One set of processes runs on the
Active Fusion Manager server and manages all per-file system databases. Stopping the service
disables access to all file systems’ databases. This section provides the basic commands for
managing the metadata service, in addition to the following sections on metadata:
•
“Saving and importing file system metadata” (page 219)
•
“Metadata and continuous remote replication” (page 221)
View the status of the metadata service:
ibrix_archiving -i
The Services section of the Management Console dashboard also displays the status of the metadata
service.
List file systems registered for the metadata service:
ibrix_archiving -l
Managing the metadata service 217