ES Index migration simplified!

Data migration may conceptually sound simple but it is one of those things that are not as simple as they sound. The lack of integration and synchronization between system components may lead to the loss or corruption of critical data. It may also lead to data quality issues along with security challenges which may incur heavy financial and reputational risks. Moreover, recovering data is an extremely tedious, time-consuming, and costly affair. And even after going through all this, the data needs to be checked and validated, resulting in extended downtimes. Considering the burnout, security challenges, and data quality issues involved in data migration, most organizations treat data migration as a distinct project. This blog is about how we addressed the exact problem for one of our clients with the help of ES Index Migration. But before we start with the actual solution for your migration needs, let me tell you in brief about ES Index and ES Index Migration.

What is ES Index?

An Index is usually a set of one or more Documents whereas a Document encompasses one or more fields. While referring to databases, a table row is termed as a Document and a table column is termed as a Field. An Index is like a database within a relational database and has mapping defining multiple types. It is a logical namespace that maps one or more primary shards and can have zero or more replica shards. Elasticsearch can fast search responses as it searches an Index instead of searching the text directly. This is like retrieving pages in a book related to a keyword by scanning the Index at the back of a book, instead of searching every word on every page of the book.

What is ES Index Migration?

Imagine a scenario where you want to migrate production Elasticsearch data to staging for QA purposes. There could be a lot of scenarios such as:

• Upgrading underlying cloud infrastructure/instance types for ES deployment
• Migrating from one cloud to another cloud
• Migrating from on-premises to cloud or vice versa
• Creating a pre-prod/staging environment from production data clusters

Here you may want to migrate Indices/data from one Elasticsearch cluster to another Elasticsearch cluster.

You can migrate ES Indices via …read more