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ElasticSearch Blueprints

You're reading from   ElasticSearch Blueprints A practical project-based guide to generating compelling search solutions using the dynamic and powerful features of Elasticsearch

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Product type Paperback
Published in Jul 2015
Publisher Packt
ISBN-13 9781783984923
Length 192 pages
Edition 1st Edition
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Toc

Table of Contents (10) Chapters Close

Preface 1. Google-like Web Search 2. Building Your Own E-Commerce Solution FREE CHAPTER 3. Relevancy and Scoring 4. Managing Relational Content 5. Analytics Using Elasticsearch 6. Improving the Search Experience 7. Spicing Up a Search Using Geo 8. Handling Time-based Data Index

Archiving time-based data


While dealing with time-based data, it is often noticed that the most useful data is that of the present. This makes the old data less relevant for our purposes. So as time progresses, the relevancy of past data falls very rapidly and the data we indexed exists without being used in the clusters. This situation is not very resource friendly, as there would be much unused data stored for no or less purpose.

We can visualize different levels of archiving, as follows:

  1. Keep the hottest index in the machines that have good hardware (shard filtering).

  2. Run the optimized API on indices where writing is done.

  3. Close indices that are not required for instant search.

  4. Take a snapshot and archive older indices.

  5. Finally, remove indices that are no longer required.

Shard filtering

With time-based data, recent indices are more frequently used or are more relevant. In other words, at a given time, the data flowing would use some specific index based on the day, week, or month. This index...

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