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CN104809032B 用于存储系统中服务感知的奇偶校验放置的方法和系统 有权 转让

用于存储系统中服务感知的奇偶校验放置的方法和系统
摘要：
一种用于存储系统中的服务感知奇偶校验放置的方法和系统，包括：在接收指定目标SD的服务通知之后，将RAID条带写入到永久存储器，其中，RAID条带的奇偶校验块存储于目标SD上并且RAID条带中的数据块均不存储于目标SD上。方法还包括执行改进的垃圾收集操作，该改进的垃圾收集操作包括：标识永久存储器中的活RAID条带；将新的RAID条带写入到永久存储器中的新位置，其中新的RAID条带包括来自活RAID条带的数据的一部分的副本，并且新的RAID条带中的奇偶校验块存储于目标SD上；当完成改进的垃圾收集操作时，发出去除通知。
摘要（英）：

A method and system for service-aware parity placement in a storage system, including after receiving (500) the service notification specifying a target SD: writing (502) a RAID stripe to the persistent storage, where the parity block of the RAID stripe is stored on the target SD and none of the data blocks in the RAID stripe are stored on the target SD. The method further includes performing (504) a modified garbage collection operation that includes identifying a live RAID stripe in the persistent storage, writing a new RAID stripe to a new location in the persistent storage, where the new RAID stripe includes a copy of at least a portion of data from the live RAID stripe and a parity block in the new RAID stripe is stored on the target SD, and issuing (506) a removal notification when the modified garbage collection operation is completed.

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