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CONSISTENT UNMAPPING OF APPLICATION DATA IN PRESENCE OF CONCURRENT, UNQUIESCED WRITERS AND READERS

机译:存在一致的,未调配的作者和读者的情况下,应用程序数据的一致解映射

摘要

Free storage blocks previously allocated to a logical block device are released back to an underlying storage system supporting the logical block device in a manner that does not conflict with write operations that may be issued to the free storage blocks at about the same time. According to a first technique, write operations on the same storage blocks to be released are paused until the underlying storage system has completed the releasing operation or, if the write operations are issued earlier than when the underlying storage system actually performs the releasing operation, such storage blocks are not released. According to a second technique, a special file is allocated the free storage blocks, which are then made available for safe releasing.
机译:先前分配给逻辑块设备的空闲存储块以与可能几乎同时发布给空闲存储块的写操作不冲突的方式释放回支持该逻辑块设备的底层存储系统。根据第一种技术,在要被释放的相同存储块上的写操作被暂停,直到底层存储系统已经完成释放操作为止,或者,如果在底层存储系统实际执行释放操作时发布了写操作,则这样存储块不会释放。根据第二种技术,为特殊文件分配了空闲存储块,然后将这些空闲存储块用于安全释放。

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