Versions Compared

Old Version 3

changes.mady.by.user Stephen Yang

Saved on

compared with

New Version Current

changes.mady.by.user Stephen Yang

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

  • Write Cache: Disabling the write cache improves latency, but sacrifices bandwidth in most cases.
  • Drives: Intel drives have the lowest latencies (<1ms) with the fastest configuration being in RAW with Write Cached Disabled (48µs write latency!!)
    • Note: The intel drive also saw a bandwidth increase with write cache disabled
  • File Systems: XFS has lower write latencies than EXT4 (1-2x faster).
  • TRIM: TRIM  TRIM makes minimal difference in the SSD write latencies (although it may be because the drive is completely empty at the beginning of the benchmark)

...