perfSONAR User Q&A and Other Discussion

[Mark Boolootian <>]

I received a question from one of the folks here on campus on
selection of MTU size.  Does anyone have any guidance/empirical
data that addresses this?

---

  Assuming your gear supports it, have you ever read anything that
  suggests some jumbo frame sizes are better for hardware than others? In
  a high performance arena?

  Aka, does 8192 (8K) make chipsets go faster than a non-byte aligned
  jumbo frame? (9000) Particularly if your application takes full
  advantage of the larger packet sizes?

  I know 9000 is "standard" but why is it standard? Its an odd number in a
  "power of 2" world so I must be missing something.

  Does a chipset work harder moving zillions of packets that are 9000
  bytes compared to 8192 bytes?