User guide

Glossary
184 Data Integration with Sybase Avaki Studio
queries
See ad-hoc query.
query engine
An Avaki service that executes SQL queries against the SQL views (tables) that make up the Avaki vir-
tual database. A query engine analyzes queries, pushes as much of the work as possible down to the
underlying relational database (if there is one), and performs the remaining operations (such as joins
across tables from different databases) itself. There is a query engine on each grid server.
remote cache
A cache service that runs on a grid server that is remote from an Avaki service (a database operation
or a data service) that generates cachable data. The remote cache stores results produced by distant
services so the results don’t have to be fetched over the network to satisfy every new request. Users
and applications that access remote data through the cache may have access to cached copies even
when the remote data source is unavailable. See also local cache.
secondary GDC
See grid domain controller.
scheduled caching
A scheme by which an object is cached according to a schedule that you create. The schedule specifies
when the object is first cached and how often (or following what trigger event, such as a change to a
file) the cache is refreshed. If the object is a data service or a database operation, the schedule runs it
to put fresh results in the cache. Scheduled caching, which overrides other types of caching, is suitable
for objects that are updated frequently or on a regular basis. Contrast with on-demand caching.
schedule exclusion
A named period of time during which scheduled activities can be prevented from running. You can
apply an exclusion to as many schedules as you want. Scheduled activities include refreshing Avaki
shares and imported user accounts, and caching files, directories, and the results of database opera-
tions, data services, and generated views.
service
An Avaki object that performs a function in the domain (stores data or authenticates users, for exam-
ple). Services provided in Avaki software include Avaki directories, Avaki shares, Avaki servers,
authentication services, execution services, and user accounts.
share
A point of connection between the Avaki data catalog and a native file system or file system tool.
Avaki supports two kinds of shares: Avaki shares and CIFS shares.