6.5 HP StoreAll OS User Guide

16 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.
Express Query provides the following components:
Where to find more informationBrief OverviewComponent
“Managing the metadata service”
(page 294)
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 299)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.
“Express Query Windows Search
Integration (EQWSI)” (page 308)
The Express Query Windows Search
Integration (EQWSI) feature in StoreAll
Express Query Windows Search
Integration (EQWSI)
lets you retrieve information quickly
from your file records on the HP
StoreAll file system from an EQWSI
supported Windows client without
having to log into any of the cluster
nodes.
“HTTP-REST API file-compatible mode
shares” (page 217)
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 a StoreAll REST API
share 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.
The tasks related to the metadata service that you can manage using the ibrix_archiving
command are:
• Start, stop, or restart the metadata service
• View the status of the metadata service
• List the file systems registered for the metadata service
294 Express Query