Operation Support System - Zte ZXMSG 5200 Technical Manual

Multiplex service gateway

Hide thumbs Also See for ZXMSG 5200:

Technical manual (69 pages)

Table Of Contents

Table of Contents

interference. This is a problem of data integrity and consistency in a

shared system.

Some concurrent control mechanisms will be used to solve this

problem.

The

mechanisms

interference from other transactions and eliminate inconsistent data

caused by concurrent transactions. The traditional concurrent control

mechanisms are divided into two kinds: Lock method and Timestamp

method, which are not used in the ZXMSG 5200 system because the

lock method needs additional overhead to test the dead lock and the

lock method will affect efficiency since transactions need be rolled

back, .

The ZXMSG 5200 system uses two methods to solve the concurrency

problem:

Providing synchronous or asynchronous messages only with an

access interface for processes with higher priority, which can

ensure time-series data access;

Requiring processes which access to the database in a synchronous

invocation mode with priorities not higher than data processes.

Since only the operating system process has a priority higher than the

database and the access to the operating system is not frequent

comparatively, the two methods will not affect the system functions.

Service process most frequently accessing the database can adopt the

synchronous invocation mode.

3. Integrity and consistency of modifying database data

The man-machine command sub-module can guarantee ZXMSG 5200

data's integrity and consistency. The O&M terminal usually sends

commands. The man-machine command sub-module analyzes and

explains these commands to determine data validity; and then the

sub-module operate the database according to the commands. If the

operation fails, the data before the operation will be recovered.