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ElasticSearch On Steroids With Avro Schemas

ElasticSearch On Steroids With Avro Schemas
How to tackle the interface version explosion in a large enterprise setup
The following article explains an approach to use modern data storage and serialization technologies to decouple components and stop the explosion of service interface versions inherent in large-scale data consumer…

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ElasticSearch On Steroids With Avro Schemas
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SCHEMAS in SQL Server -MS SQL Server – Zero to Hero Query Master

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A glimpse of previous articles
Part 1

In part one, we learned the basics of data, database, database management system, and types of DBMS and SQL.

Part 2
  • We learned to create a database and maintain it using SQL statements.
  • Best practice methods were also mentioned.

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Shana  Towne

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ElasticSearch On Steroids With Avro Schemas

ElasticSearch On Steroids With Avro Schemas
How to tackle the interface version explosion in a large enterprise setup
The following article explains an approach to use modern data storage and serialization technologies to decouple components and stop the explosion of service interface versions inherent in large-scale data consumer…

#java #avro #elasticsearch #programming

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Elasticsearch 7.x Backup — “Snapshot & Restore” on AWS S3

In 2016 I wrote an Article about Elasticsearch Backup, it had and still has quite good interests from people. I decided to start a new series of articles with the Backup topic as the main argument.

The old article covered Snapshot & Restore functionalities based on Elasticsearch 2.4.x and the upcoming version, the 5.0. As it was 4 years ago I choose to refresh this tutorial and making it the first of a series of more.

I will prepare a small article on how to use the snapshot & restore functionality with different cloud-provider. This article is based on Elasticsearch 7.x, it doesn’t mean it couldn’t work on older versions but I focused on the latest one.

Elasticsearch Snapshot & Restore

Elasticsearch has a smart solution to backup single indices or entire clusters to remote shared filesystem or S3 or HDFS. The snapshot ES creates does not so resource consuming and is relatively small.

The idea behind these snapshots is that they are not “archive” in a strict sense, these snapshots can only be read by a version of Elasticsearch that is capable to read the index version stored inside the snapshot.

So you can follow this quick scheme if you want to restore ES snapshots :

  • A snapshot of an index created in 6.x can be restored to 7.x.
  • A snapshot of an index created in 5.x can be restored to 6.x.
  • A snapshot of an index created in 2.x can be restored to 5.x.
  • A snapshot of an index created in 1.x can be restored to 2.x.

Snapshots of indices created with ES 1.x cannot be restored to 5.x or 6.x, snapshots of indices created in 2.x cannot be restored to 6.x or 7.x, and snapshots of indices created in 5.x cannot be restored to 7.x or 8.x.

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