Slow Performance on encrypted ACFS filesystem (Doc ID 2539685.1)

Last updated on JULY 20, 2024

Applies to:

Symptoms

After encrypting some folder on an ACFS filesystem with AES256 algorythm, the performance for the filesystem drops drastically when reading/writing into
the encrypted folder; based on tests ,there was an average of ~70% drops (268MB/s -> 78MB/s) in throughput on read operations, and ~87% drops (132MB/s-> 17MB/s) on write operations.

After applying patch 27611913 , 4k write non-encrypted result: 224MB/s (100%), encrypted result: 52MB/s (23.2% of the performance of non-encrypted),
so the loss is 76.8%.

Cause

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