On 03/14/2015 10:05 PM, David Collier-Brown wrote:
On 03/14/2015 03:00 PM, divya singla asked
Hi Members,
is there anybody who can explain me difference between latency and
delay?
In queuing, latency is the time between the send and the first byte of
the reply, and (total) response time is the time between the send and
the last byte of the reply. The time between first and last byte is
the transfer time. Both are stated as if they were being observed by a
client, either nearby or remote.
Delay, on the other hand, is the time the job spends sitting in a
queue waiting to start work. Service time is the time it takes to do
the work. Both are specifically at the server, or "queuing center"
If you draw a diagram, they overlap inconveniently (;-))
--dave
For example, in
\
|- queue delay
|- service time
/|- more service time
|
/
The latency is the time from \ to the first /, and it contains the
network time, the queuing delay and all the service time required to get
to the first byte of the reply.
The transfer time is from the \ to the last /, and includes and
additional service time to get to the last byte of the reply
--dave
--
David Collier-Brown, | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
[email protected] | -- Mark Twain
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