3 ms·

Block sizes can often be set to at least 65KB, does this not help the problem?

• wtallis 7y ago
  It helps a bit, but keep in mind that just because your filesystem is doing most of its allocation in 64kB chunks, doesn't mean it is issuing only 64kB IOs to the drive itself.
  • sliken 7y ago
    Additionally it doesn't mean that your 64KB chunks aligned to your current partition are also aligned with the 64KB boundary of the underlying block device.
• Dylan16807 7y ago
  It's the erase blocks that cause the real problems. If a page is 8KB or 16KB then raw writes would hit the IOPS cap before the bandwidth cap, but that wouldn't be a major source of issues. With erase blocks at a megabyte or larger, they introduce enormously complex remapping and garbage collection requirements. You can't do a whole lot about those problems with a block device API.