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Best practices for running Apache Cassandra with Amazon EBS
- AWS operators often ask what storage they should use to get the best price-performance for Apache Cassandra.
- Developers want to use Amazon Elastic Block Store (Amazon EBS) instead of instance storage with Cassandra.
- Amazon EBS offers several advantages over an instance store that make it a solid choice.
- In this post, we discuss the basics of improving the performance of Amazon EBS with Cassandra to take advantage of the operational benefits.
- Linux iostat is a general-purpose tool to help you understand your I/O usage at a high level.
- You can find out your readahead by running a command and looking at the RA column for each device.
- Tuning compression, picking the right compaction strategy, and reducing—but not eliminating—readahead can minimize read amplification and keep your Cassandra cluster performance running consistently on Amazon EBS while reducing required IOPS.
- With the right tooling, monitoring, and configuration tuning, you can achieve great price-performance for running Cassandra deployments on EBS volumes while benefiting from operational advantages over ephemeral instance storage.
- Jon Haddad is an Apache Cassandra committer specializing in performance tuning, fixing broken clusters, and cost optimization.
- He previously worked on some of the biggest Cassandra deployments in the world.
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