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发明授权
US07752170B2 Implementing dynamic copy-on-write (COW) storage compression in COW storage through zero and deleted blocks 失效
通过零和删除的块在COW存储中实现动态写时复制（COW）存储压缩

Implementing dynamic copy-on-write (COW) storage compression in COW storage through zero and deleted blocks
摘要：
Methods, apparatus and computer program product implement enhanced dynamic copy-on-write storage compression. For a write operation, a freed block is detected by the COW storage for compressing freed blocks from the COW storage. Responsive to the detected freed block being a previously written block in the COW storage, the previously written block in the COW storage is deleted from the COW storage. Responsive to the detected freed block not being a previously written block in the COW storage, the block is marked as zero in the COW storage.
摘要（中）：

方法，设备和计算机程序产品实现增强的动态写时复制存储压缩。 对于写入操作，COW存储器检测到释放的块，用于从COW存储器压缩释放的块。 响应于检测到的释放块是COW存储器中的先前写入的块，COW存储器中的先前写入的块从COW存储器中被删除。 响应于检测到的释放块不是COW存储器中先前写入的块，块在COW存储中被标记为零。

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