Showing content from http://mongodb.github.io/node-mongodb-native/2.2/api/ReadPreference.html below:
Class: ReadPreference
Class: ReadPreference
Creates a new ReadPreference instance
Read Preferences
- ReadPreference.PRIMARY, Read from primary only. All operations produce an error (throw an exception where applicable) if primary is unavailable. Cannot be combined with tags (This is the default.).
- ReadPreference.PRIMARY_PREFERRED, Read from primary if available, otherwise a secondary.
- ReadPreference.SECONDARY, Read from secondary if available, otherwise error.
- ReadPreference.SECONDARY_PREFERRED, Read from a secondary if available, otherwise read from the primary.
- ReadPreference.NEAREST, All modes read from among the nearest candidates, but unlike other modes, NEAREST will include both the primary and all secondaries in the random selection.
Name Type Description mode string
The ReadPreference mode as listed above.
tags array | object
An object representing read preference tags.
options object optional
Additional read preference options
Name Type Description maxStalenessSeconds number optional
Max Secondary Read Staleness in Seconds
Returns: ReadPreference instance.
Methods
-
staticReadPreference.isValid(mode){boolean}
-
Validate if a mode is legal
Name Type Description mode string
The string representing the read preference mode.
-
-
Validate if a mode is legal
Name Type Description mode string
The string representing the read preference mode.
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