Siren Platform User Guide

Viewing document context

For certain applications it can be useful to inspect a window of documents surrounding a specific event. The context view enables you to do just that for index patterns that are configured to contain time-based events.

To show the context surrounding an anchor document, click Expand (fa-caret-right.png) to the left of the document’s table entry and then click the View surrounding documents link.

Expanded document.

The context view displays a number of documents before and after the anchor document. The anchor document itself is highlighted in blue. The view is sorted by the time field specified in the index pattern configuration and uses the same set of columns as the Discover view the context was opened from. If there are multiple documents with the same time field value, the internal document order is used as a secondary sorting criterion by default.

Note

The field used for tie breaking in case of equal time field values can be configured using the advanced setting context:tieBreakerFields in ManagementAdvanced Settings, which defaults to the _doc field. The value of this setting can be a comma-separated list of field names, which will be checked in sequence for suitability when a context is about to be displayed. The first suitable field is then used as the tie breaking field. A field is suitable if the field exists and is sortable in the index pattern the context is based on.

While not required, you should only use fields which have doc values enabled to achieve good performance and avoid unnecessary field data usage. Common examples for suitable fields include log line numbers, monotonically increasing counters and high-precision timestamps.

Context view.

Note

The number of documents displayed by default can be configured using the context:defaultSize setting in ManagementAdvanced Settings.

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