ECS 3.6.2 Data Access Guide

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Metadata search with Tokenization

Tokenization allows you to use metadata search to search for objects that have a specific metadata value within an array of metadata values.

Tokenization is enabled using the x-emc-metadata-search-tokens: true header. When creating a bucket, you can specify whether the metadata value should follow the existing method (without tokenization) or the new method (with tokenization). However, both methods cannot be used on the same bucket.


Methods	Description
Existing method without tokenization	In this method, the metadata value is interpreted as a single value. For example, in the x-amz-meta-countries= [france,uk] command, the france,uk value is considered as a single value.
New method with tokenization	In this method, each element of a metadata value is searchable. For example, in the x-amz-meta-countries= [france,uk] command, the france,uk value is considered as two values separated with the delimiter.