Invention Application
US20150370498A1 NVRAM DATA ORGANIZATION USING SELF-DESCRIBING ENTITIES FOR PREDICTABLE RECOVERY AFTER POWER-LOSS 审中-公开
电力损失后使用自我描述实体进行可预测恢复的NVRAM数据组织

  • Patent Title: NVRAM DATA ORGANIZATION USING SELF-DESCRIBING ENTITIES FOR PREDICTABLE RECOVERY AFTER POWER-LOSS
  • Patent Title (中): 电力损失后使用自我描述实体进行可预测恢复的NVRAM数据组织
  • Application No.: US14839667
    Application Date: 2015-08-28
  • Publication No.: US20150370498A1
    Publication Date: 2015-12-24
  • Inventor: Kayuri H. PatelHari Shankar
  • Applicant: NetApp, Inc.
  • Main IPC: G06F3/06
  • IPC: G06F3/06
NVRAM DATA ORGANIZATION USING SELF-DESCRIBING ENTITIES FOR PREDICTABLE RECOVERY AFTER POWER-LOSS
Abstract:
In one embodiment, a node coupled to a plurality of storage devices executes a storage input/output (I/O) stack having a plurality of layers including a persistence layer. A portion of non-volatile random access memory (NVRAM) is configured as one or more logs. The persistence layer cooperates with the NVRAM to employ the log to record write requests received from a host and to acknowledge successful receipt of the write requests to the host. The log has a set of entries, each entry including (i) write data of a write request and (ii) a previous offset referencing a previous entry of the log. After a power loss, the acknowledged write requests are recovered by replay of the log in reverse sequential order using the previous record offset in each entry to traverse the log.
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