VB 版 (精华区)
发信人: Friend (沙漠绿洲), 信区: VisualBasic
标 题: Avoiding the Top-Ten Design Mistakes(3)
发信站: 哈工大紫丁香 (Thu Jun 24 10:04:33 1999), 转信
发信站: 饮水思源站 (Sun May 30 15:12:47 1999) , 站内信件
3) The design assumed that since the application worked for
5 users it would work for 50 or 500 or 5000. A corollary to
this problem is: "since the application worked with 500 users
on the test network, it would work on the live corporate network".
Too often we see designs that don't account for the volume of
traffic generated by their application and all of the applications
that use the same design taken as a whole. In today's world of
500K email messages broadcast throughout the net to announce
the birth of the new group administrator's son, network bandwidth
is already pretty much taxed to the limit. Scalability of any
application depends on the quantity of resources consumed by
each individual application. This includes workstation resources
but also must include network packets sent and received, round-trips
to the server, and resources on the server. If a single application
creates a 40MB TempDB sorted result set, how is the system going
to support 50 or 500 instances of the same application-each
consuming server resources like teenagers at the jar of M&Ms?
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☆ 来源:.哈工大紫丁香 bbs.hit.edu.cn.[FROM: Friendsp.bbs@bbs.sjt]
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