The tiny joystick has been replaced by cellphone-like four-way control buttons, and the page-turn Forward and Back buttons, which flank both edges, are silent now, for the benefit of sleeping spouses.
The most common method is to split the categories into a four-way matrix with server and virtual machine problems on one axis and network and storage on the other axis.
最常见的方法是分类归入到四维矩阵中，矩阵的一个轴上是服务器和虚拟机，另外一个轴上是网络和存储。
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When running the R6Mail benchmark using NotesBench, we found that Lotus Domino 7 with DB2 storage can support 15,000 users on a four-way AIX server.