Host GS: Log Decoder Service Configuration

Document created by RSA Information Design and Development on Jun 22, 2017Last modified by RSA Information Design and Development on Jul 27, 2017
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This topic lists and describes the available configuration parameters for RSA Security Analytics Log Decoders.

Log Decoder Configuration Settings

This table lists and describes the Log Decoder configuration settings.

                                     
Log Decoder Setting FieldDescription
Database /database/config refer to the Database Configuration Nodes topic in the Security Analytics Core Database Tuning Guide
Decoder /decoder/config refer to Decoder and Log Decoder Common Configuration
Index /index/config refer to the Index Configuration Nodes topic in the Security Analytics Core Database Tuning Guide
Logs /logs/config refer to Core Service Logging Configuration
REST /rest/config refer to REST Interface Configuration
SDK /sdk/config refer to the SDK Configuration Nodes topic in the Security Analytics Core Database Tuning Guideand Security Analytics Core Service system.roles Modes
System /sys/config refer to Core Service System Configuration

Log Tokenizer Configuration Settings

The log decoder has a set of configuration items that control how the automatic log tokenizer creates meta items from unparsed logs.

The log tokenizer adds word meta items to logs. These word items form a full-text index when they are fed to the indexing engine on the Concentrator and Archiver.

                             
Log Decoder Parser Setting FieldDescription
token.device.types The set of device types that will be scanned for raw text tokens. By default, this is set to unknown, which means only logs that were not parsed will be scanned for raw text. You can add additional log types here to enrich parsed logs with text token information.

If this field is empty, then log tokenization is disabled.
token.char.classes This field controls the type of tokens that are generated. It can be any combination of the values alpha, digit, space, and punct. The default value is alpha.
  • alpha: Tokens may contain alphabetic characters
  • digit: Tokens may contain numbers
  • space: Tokens may contain spaces and tabs
  • punct: Tokens may contain punctuation marks
token.max.length This field puts a limit on the length of the tokens. The default value is 5 characters. The maximum length setting allows the Log Decoder to limit the space needed to store the word metas. Using longer tokens requires more meta database space, but may provide slightly faster raw text searches. Using shorter tokens causes the text query resolver to have to perform more reads from the raw logs during searches, but it has the effect of using much less space in the metadb and index.
token.min.length This is the minimum length of a searchable text token. The minimum token length will correspond to the minimum number of characters a user may type into the search box in order to locate results. The recommended value is the default, 3.
token.unicode This boolean setting controls whether unicode classification rules are applied when classifying characters according to the token.char.classes setting. If this is set to true, each log is treated as a sequence of UTF-8 encoded code points and then classification is performed after the UTF-8 decoding is performed. If this is set to false, then then each log is treated as ASCII characters and only ASCII character classification is done. Unicode character classification requires more CPU resources on the Log Decoder. If you do not need non-English text indexing, you can disable this setting to reduce CPU utilization on the Log Decoder. The default is enabled.
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