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  • In general, pulling an image from a cache is far faster than performing a database read.
  • ElastiCache uses shards as a grouping mechanism for individual Redis nodes. So a single node is part of a shard, which in turn is part of a cluster.

  • Consider ElastiCache as only useful for storing transient data. Further, it’s not a persistent store; therefore, it’s great for caching data from a message queue or providing very fast ephemeral storage.Ø

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