How do you reduce latency? Is it at the network level, or the server level? Or both? I'm no high-end networking guru. But I am starting to dabble into the dark arts that are crazy-expensive networking switches for SAN communications and TOR switches. Until recently, I have found that the good-olde HP Procurve 2510 switch line (and its' replacement, the 2530) has been good enough for most of our needs... and now I'm seeing that change. For example, we were experiencing minor network issues with our mail server (it was complaining that you had lost it's connection on occasion when you used the web interface). For a while, I thought the problem was with our VMware servers, but on a hunch, I decried to bypass the 2510G switch they were aggregated through directly to our 5308xl. Guess what, the problem all-but disappeared. Obviously, the 2510 can't handle the traffic. On a similar note, We used to be running HP 2910s as our iSCSI traffic connection switches between our 3 VMware hosts and our EqualLogic, but we were again having latency issues. As recommended by our vendor, we upgraded to Dell PowerConnect 6224s. On paper, these two switches are quite similar, but the Dell switches handle the latency where the HPs were not. So, What does one look for? Is there a resource available that test, or even benchmarks these switches? Or do I have to go by the voodoo method of asking my vendor "which switch is best" for my situation? (In our vendor's case, they were pushing a very expensive Brocade switch that we were not prepared to pay for.)
--Matt Ross Ephrata School District Ben Scott <[email protected]> , 5/28/2014 10:57 AM: On Wed, May 28, 2014 at 1:36 PM, Matthew W. Ross <[email protected]> wrote: > Last, It's amazing how little bandwidth is actually used by the end user. > Except for saving some big files, 10Mbit would likely _still_ be enough for > the average user. Latency is the real killer. Not that management (or the telco sales guys) understand this. -- Ben
