这种方式的缺点就是引入了内部碎片（ Internal Fragmentation）,即每个程序需要占用一整块区域，而它的大小很难与区域大小完全相符，区域大小多出来的部分也无法被其它程序使用，从而造成内存资...
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如图 6 所示，spine 中由于内部碎片导致的内存使用开销已经通过将叶子的所有 trailing 数据包含到 spine 中而得到优化。
As Figure 6 illustrates, memory-use overhead that's because of internal fragmentation in the spine has been optimized by including any trailing data for a leaf into the spine.
许多陨石是由内部形成的小行星经过随后的撞击后打散的石头碎片。
Many meteorites are pieces of rock that formed inside small planets which were shattered by subsequent collisions.
不能对包含内部快照的JFS2文件系统执行碎片整理。
A JFS2 file system with internal snapshots cannot be defragmented.
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