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On 12/12/17 10:15, Neil Bothwick wrote: |
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> That means every write has to be encrypted 4 times, whereas using |
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> encryption in the filesystem means it only has to be done once. I tried |
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> setting encrypted BTRFS this way and there was a significant performance |
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> hit. I'm seriously considering going back to ZoL now that encryption is |
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> on the way. |
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DISCLAIMER - I DON'T HAVE A CLUE HOW THIS ACTUALLY WORKS IN DETAIL |
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but there's been a fair few posts on LKML sublists about how linux is |
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very inefficient at using hardware encryption. Setup/teardown is |
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expensive, and it only encrypts in small disk-size blocks, so somebody's |
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been trying to make it encrypt in file-system-sized chunks. When/if they |
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get this working, you'll probably notice a speedup of the order of 90% |
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or so ... |
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Cheers, |
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Wol |
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