Avaya Glossary of Media Processing Server Series Terminology (Software Release 2.1) Instrukcja Użytkownika Pobierz pdf (Strona 67)

logical line

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lock Exclusive control of an individual database record.

For hashed and indexed files, the PeriProducer DiskIO block requires

that an application maintain exclusive control of an individual record

for the purpose of updating or deleting it. During such operations, the

record is locked by the application, which prevents an application on

another line from updating or deleting that record until the first

request has completed. If an application on another line attempts to

modify or delete a locked record, the latter is suspended (that is,

paused) until the lock is released.

A lock must be previously established on a record (using the Read

and Lock option) for an application to either update it or delete it

(using the Update or Delete options). This means that for the

application to implement a single Delete or Update request, two

DiskIO blocks are required. The first DiskIO block locks the record

using Read and Lock and the second DiskIO block specifies the

Delete or Update request.

When an application places a lock on a record, the lock should be

released as soon as possible to avoid obstructing modifications to that

record by other lines.

For additional information, see the PeriProducer User’s Guide.

See also hashed, indexed, database, PeriProducer, application.

Log The text-based utility used to display messages sent between Avaya

MPS processes. Log monitors message traffic among selected VOS

processes and may be used for diagnostics.

For additional information, see the Avaya MPS System Reference

Manual.

See also VOS, Avaya MPS, command man page utils log.

logical line See administrative line.

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Avaya Glossary of Media Processing Server Series Terminology (Software Release 2.1) Instrukcja Użytkownika Strona 67