... Dim ChunkAry() As Byte '数据块数组 Dim ChunkSize As Long '数据块大小 Dim Fragment As Long '零碎数据大小 ...
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主键大小不能超过一个数据块大小。 。
Thee size of the primary key cannot exceed approximately one database block.
数据块大小应该是一个多个操作系统的块大小以最大限度的避免不必要的 I / O。
The data block sizes should be a multiple of the operating system's block size within the maximum limit to avoidunnecessary I/O.
对应用数据分块，使得数据块大小符合通信子网mtu有效负载的要求，避免IP层分片需要重新分配缓冲区、计算校验和以及数据复制的费时操作。
Therefore, it can reduce one time data handling, 3 divide application data into blocks that content the demand of effective load of communication subnet MTU to avoid IP fragments.
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