How to Improve Snapshot to S3 rate?

Elastic Stack Elasticsearch
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The archive rate is only around 60mb/s on a large cluster (72 warm nodes). How to improve the rate to around 100mb/s?

What I have tried:

  1. Enable the S3-accelerate mode. However, ES doesn't support it per Enabling Transfer acceleration · Issue #64831 · elastic/elasticsearch · GitHub

  2. It doesn't help to adjust max_snapshot_bytes_per_sec since the default limit 40mb/s is sufficient.

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