...法 - docin.com豆丁网 PPM中, α0 =1- ∑ d i=1 αi =0.因此,就 鲁棒性而言, OPPM优于FPPM.标记开销( marking overhead , MO )用路由器标记包的次数来衡量,记为 y.IP追踪是在已有的网络设施上附加的网络服务, 对路由器要求的标..
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...cin.com豆丁网 PPM中, α0 =1- ∑ d i=1 αi =0.因此,就 鲁棒性而言, OPPM优于FPPM.标记开销( marking overhead , MO )用路由器标记包的次数来衡量,记为 y.IP追踪是在已有的网络设施上附加的网络服务, 对路由器要求的标...
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卡片标记有几项开销——卡片映射所需的额外空间、对每一个指针存储所做的额外工作,以及在垃圾收集时做的额外工作。
There are several costs to card marking - additional space for the card map, additional work to be done on each pointer store, and additional work to be done at garbage collection time.
带标记的消息还需要分配可变长度的数据元素来存储检索数据值而带来的空间开销。
A tagged message also has the space overhead of allocating variable length data elements to store the retrieved data values.
其他特性(比如多 MAIL.BOX 数据库)消除了未读标记带来的额外开销,并且通过事务日志改进了性能。
Other features, like multiple MAIL.BOX databases, eliminating the extra overhead of unread marks, and transaction logging have also improved performance.
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