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Cassandra cluster – what’s the recommendation for IOPS on Cassandra?

Solved897 views17th July 2023Cassandra cassandra cluster
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Bruno Dias [SLC] [DevOps Member]2.36K 1st April 2022 0 Comments

While building up a new Cassandra Cluster to be used with DataMiner, is there any recommendation about the nr of input/output operations per seconds?

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 17th July 2023

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Jochen Dewachter [SLC] [DevOps Advocate]2.16K Posted 1st April 2022 2 Comments

As far as I’m aware, a recommended IOPS value can’t be given because that depends on the block size of your disk.

Quoting from this page:

  • 4 KiB blocks should be 10 MB/s or higher.
  • 512 KiB blocks should be 300 MB/s or higher.
Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 17th July 2023
Bruno Sousa [DevOps Member] commented 13th April 2022

Hello Jochen

These values apply to the data or to the commit_log disk?

Thank you.

Best regards
Bruno Sousa

Marieke Goethals [SLC] [DevOps Catalyst] commented 17th July 2023

This refers to the data block size. Note that the requirements Jochen refers to have been moved to https://docs.dataminer.services/user-guide/Reference/DataMiner_Compute_Requirements.html

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