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Hi,</div>
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I am using a lustre 2.15.1 cluster with PFL. I'm using the following layout:</div>
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lfs setstripe -E 1M -L mdt -E 128M -c 1 -S 4M -E 2G -c 2 -z 64M -E -1 -c -1 -z 256M /lustre</div>
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OST's have zpools with zstd compression enabled.</div>
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This has worked fine for me for many years.</div>
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I now have new servers and installed 2.16.1 on them. I used the same PFL layout, and after some benchmarking I proceeded to copy data from the old lustre to the new.</div>
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After a while I noticed that it was filling up faster that expected, and say that the compression ratio on the zpools was 1.</div>
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Compression on the zpools is enabled, it should have worked as far as I can tell.</div>
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When I disable PFL, compression works as expected.</div>
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I have attached the some results in a txt file.</div>
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I have also tried 2.15.7 with the same results. Enabling PFL, or just DoM disables compression on the OST's.</div>
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Am I missing something obvious here? </div>
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Regards,</div>
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Martin Balvers</div>
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