IT. Expert System.

PHP

Choose a new slave for slaveOkay reads


Mongo::switchSlave

(PECL mongo >=1.1.0)

Mongo::switchSlaveChoose a new slave for slaveOkay reads

Description

public string Mongo::switchSlave ( void )

This choses a random slave for a connection to read from. It is called automatically by the driver and should not need to be used. It calls Mongo::getHosts() (to refresh the status of hosts) and Mongo::getSlave() (to get the return value).

See the query section of this manual for information on distributing reads to slaves.

Parameters

This function has no parameters.

Return Values

The address of the slave this connection is using for reads. This may be the same as the previous address as addresses are randomly chosen. It may return only one address if only one secondary (or only the primary) is available.

For example, if we had a three member replica set with a primary, secondary, and arbiter this method would always return the address of the secondary. If the secondary became unavailable, this method would always return the address of the primary. If the primary also became unavailable, this method would throw an exception, as an arbiter cannot handle reads.

Errors/Exceptions

Throws a MongoException (error code 15) if it is called on a non-replica-set connection. It will also throw MongoExceptions if it cannot find anyone (primary or secondary) to read from (error code 16).



Content

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary

License.
All information of this service is derived from the free sources and is provided solely in the form of quotations. This service provides information and interfaces solely for the familiarization (not ownership) and under the "as is" condition.
Copyright 2016 © ELTASK.COM. All rights reserved.
Site is optimized for mobile devices.
Downloads: 141 / 158702035. Delta: 0.04699 с