Performance halved at a stroke (ReadyNAS Duo, 4.1.8) ...

ard wrote:
Bonjour on jumbo on read 32.4 MB/s write 22 MB/s jumbo off read 17.1 MB/s, write 10.9 MB/s Bonjour off jumbo on read 21.8 MB/s write 18.2 MB/s jumbo off read 21.8 MB/s write 13.3 MB/s Processor load was about 0.4 (as per MenuMeters) across all measurements. I think this throws a spanner in the works of your conclusion?

Hi Ard,

Thanks for testing and sharing stats ... it feels like pooling our results might be the only way we can actually trace the issue. I can't say I have anything as solid as a conclusion but I do have a hunch which could use confirming or disproving with some independent tests so this is good stuff.

Your results make very interesting reading too as they seem to confirm Bonjour is impacting performance ... a seemingly positive impact with Jumbo Frames enabled and a negative one if (like me) you have them disabled. No spanner in the works, then ... the drop in performance when Bounjour is active vs inactive (Jumbo Frames disabled) is (while less significant than I've seen) consistent with my own testing.

Jumbo frame should increase throughput and your 'Bonjour On' performance results reflect this quite nicely. With Bonjour off, however, you seem to be see better performance with Jumbo frames disabled than enabled which is very strange. As a service discovery/name resolution protocol (which isn't responsible for file transfer activities itself) I wouldn't expect to see Bonjour have any impact on performance at all.

Thanks,

Justin