SMTP: Benchmarking the SMTP GatewayLast reviewed: October 20, 1997Article ID: Q137043 |
3.00
MS-DOS
kb3rdparty
The information in this article applies to:
SUMMARYThis article is intended to give you an idea of the volume of mail this gateway can theoretically move for inbound mail and outbound mail. This information will help you set the proper expectations of this gateway in high volume environments, or when a disproportionate amount of mail moves into, or out of, the postoffice. The tests were conducted with the following assumptions:
MORE INFORMATION
OutboundWhen you move mail from the Microsoft Mail environment to SMTP, there are three obvious variables: the Wait Option, the actual time it takes to send mail, and how many messages move per cycle. A cycle begins with a wait state and ends with a wait state. A limit of six messages is sent outbound during each cycle. Below are examples of how changing the Wait Option will increase or decrease the volume of mail moving out of the SMTP gateway. A large wait time will decrease the amount of time available for outgoing mail; thus, it limits the amount of outbound mail.
FactorsWait Option (Sec) 120 (default) Time to send msg. (sec) 2.5 Mail per cycle 6 Wait time per cycle (sec) 105 Active Time per cycle (sec) 15 Hours Days Time period (Sec) 86,400 24 1 Waiting for Inbound Mail (Sec) 75,600 21 87.5% Active gateway time (Sec) 10,800 3 12.5% ======= Messages Sent over 24 hour period 1,800 FactorsWait Option (Sec) 15 Time to send msg. (sec) 2.5 Mail per cycle 6 Wait time per cycle (sec) 0 Active Time per cycle (sec) 15 Hours Days Time period (Sec) 86,400 24 1 Waiting for Inbound Mail (Sec) 0 0 0.0% Active gateway time (Sec) 86,400 24 100.0% ======= Messages Sent per Time period 14,400 FactorsWait Option (Sec) 600 Time to send msg. (sec) 2.5 Mail per cycle 6 Wait time per cycle (sec) 585 Active Time per cycle (sec) 15 Hours Days Time period (Sec) 86,400 24 1 Waiting for Inbound Mail (Sec) 84240 23.4 97.5% Active gateway time (Sec) 2,160 0.6 2.5% ==== # Message Sent per Time period 360Per the factors above, if you change the -W option, it has a substantial impact on the volume of mail moved out of the gateway. Inversely, this will affect the availability of inbound messages. Depending on how much mail needs to be sent, or which way it needs to be sent, this option will determine how you configure your gateway. However, there is one more issue that should be addressed. Receiving mail, unlike sending mail, does not limit how many messages may be received during a cycle. (This is not possible to configure on the SMTP host.) In theory, once a connection is made messages will be received indefinitely. Therefore, the setting of the command-line options makes no difference.
InboundBelow is a table showing the maximum volume of inbound messages based on the same size message.
FactorsWait Option (Sec) 120 Default Time to receive msg. (sec) 2.5 Messages per cycle Unlimited Checking for mail per cycle (sec) 0 Receive Mail per cycle (sec) 300 Hours Days Time period (Sec) 86,400 24 1 Time spent checking for mail per day (Sec) 0 0 0.0% Time Spent Receive mail (Sec) 86,400 24 100.0% # Message received per Time period 34,560 |
Additional reference words: 3.00
© 1998 Microsoft Corporation. All rights reserved. Terms of Use. |