On Apr 19, 2008, at 3:03 AM, Rob van der Heij wrote:
On Fri, Apr 18, 2008 at 11:19 PM, Mike Walter
<[EMAIL PROTECTED]> wrote:
We've determined an average workstation latency (simply using PING)
for a
workstation "far, far away" as being about 380-400ms.
But we don't know what it would be like to actually WORK on that
workstation
day-in and day-out. Most of the work would be in support of Linux
for
System z servers. Most likely via SSH (using SecureCRT from VanDyke
Software), but also some 3270 usage, net surfing, and Lotus Notes.
400 ms is rather long indeed. I work a lot on remote systems where
ping times are in 100-200 ms range.
Obviously for 3270 it is mostly a non-issue and people with VTAM
terminals have done much worse forever. But even for ssh connections I
have no problem working on the other side of the big pond. You can do
quite some type-ahead on the average Linux session. I don't think my
sustained typing rate with think time goes beyond 5 cps. If the system
feels too slow to work with, it's almost always performance issues on
the other end or network problems that cause re-transmits.
During some portion of the year, I work over a satellite link. Best
case is about 700ms, often much worse.
It's tolerable but annoying for ssh. tn3270 is essentially
unaffected, as are, of course, web and email (except that pages take a
long time to start to load). It's not reasonably usable for remote
desktop stuff.
Adam
