Data storage method, data recovery method, related apparatus, and system
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United States of America Patent
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Nov 20, 2018
Grant Date -
Mar 15, 2018
app pub date -
Nov 20, 2017
filing date -
Jun 4, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A data storage method is used to improve storage consistency of a distributed storage system. The method includes: a primary storage node performs EC coding on a to-be-stored data segment to obtain a target EC stripe; determines in a storage node group to which the primary storage node belongs, m+k target storage nodes used to store m+k target EC blocks of the target EC stripe; sends a preparation message to the target storage nodes; receives a response message sent by a target storage node; and sends an execution message to the target storage nodes to instruct the target storage nodes to write target EC blocks that are in preparation logs.
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