Elasticsearch Backup and Restore in Production

ES backup and restore using AWS S3

We were fortunate enough to get an opportunity to do an Elasticsearch cluster snapshot and restore on a production highly active cluster. The indices we needed to restore were around 2 – 3 TB in size.

Our task was to take a snapshot from an old cluster (v 6.4.2) which had several huge indices and restore a few of them to a new cluster (v7.9.2). This endeavour was supposed to bring the load down from the old cluster.  

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