>>>>> On Fri, 22 Dec 2000 19:25:03 +0000 (GMT), "Al B. Snell"
><[EMAIL PROTECTED]> said:
Al> On Fri, 22 Dec 2000 [EMAIL PROTECTED] wrote:
>> > You're missing the point - HTTP is slow! It doesn't load the
>> > server, it's just slow!
>>
>> Its not slower than rpc, corba, ftp, nfs or sendmail.
Al> Is so.
Al> HTTP:
Al> 1) TCP 3 way handshake
Al> 2) Send request packet
Al> 3) Receive request ack
Al> 4) Receive reply packet(s) and send ACKs
Al> 5) TCP teardown, or return to step 2 for persistent connections
Al> RPC over UDP:
Al> 1) Optionally send portmap request and wait for reply
Al> 2) Send request and wait for reply
Al> 3) Return to step 2 for further requests
Al> (one or two round trip times)
Al> RPC over TCP:
Al> 1) Optionally send portmap request and wait for reply
Al> 2) 3 way TCP handshake
Al> 3) Send request packet
Al> 4) Receive request ACK
Al> 5) Receive reply packets and send ACKs
Al> 6) Return to step 3
Al> Now, RPC over TCP has similar packet-latency as HTTP so long as
Al> HTTP is using persistent connections; but that doesn't increase
Al> much if you use secure RPC which is much more lightweight than
Al> SSL.
Al> I would suggest making good use of RPC over UDP - the connection
Al> should start off with UDP, and only make TCP connections when
Al> "transactions" are being performed. UDP will be fine for reading
Al> data, since if a packet gets lost, a retransmit will have no
Al> idempotency problems... TCP will implement the retransmit in a
Al> much bulkier way. RPC over UDP is as fast as an Internet protocol
Al> can *ever* get.
OK. So the question I have is "So what?" HTTP is slower than a UDP
protocol because it's TCP (that's the basic gist of this right?). So
what? Is it too slow for our uses? No one knows because it hasn't
been tested. My bet: nope not anywhere near too slow.
Now. What's simpler? What is more easily understandable? What's
more universal? Those are the questions that seem more important to
me.
Jim
--
@James LewisMoss <[EMAIL PROTECTED]> | Blessed Be!
@ http://jimdres.home.mindspring.com | Linux is kewl!
@"Argue for your limitations and sure enough, they're yours." Bach
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