Sequential write and random write for Elasticsearch

Elastic Stack Elasticsearch
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For HDD, There is a huge performance difference between sequential write and random write.

  1. I wonder if Elasticsearch also has this issue ? For instance, If I want to write 1M records, 1KB per record, into ES, how can I avoid random access as much as possible ?

  2. What is the worst case which bring a lot of random access for ES?

Our ES running is on RAID-0

Thanks,

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