Method and device for supporting hot plug of cache disk

The invention discloses a method and a device for supporting hot plug of a cache disk. The method comprises the following steps of: after detecting that the cache _ dev disk of a block device used forcaching or the cached cache _ dev disk of a block device is pulled out, starting the cache _ dev dis...

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Bibliographic Details
Main Author LIU LIANGQING
Format Patent
LanguageChinese
English
Published 26.05.2020
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:The invention discloses a method and a device for supporting hot plug of a cache disk. The method comprises the following steps of: after detecting that the cache _ dev disk of a block device used forcaching or the cached cache _ dev disk of a block device is pulled out, starting the cache _ dev disk of the block device; maintaining an association relationship between a cache _ dev disk and a cache _ dev disk of the cache disk, and maintaining a dirty data state identifier in the cache _ dev disk; after detecting that the cache _ dev magnetic disk or the cache _ dev magnetic disk is inserted,starting the cache _ dev magnetic disk or the cache _ dev magnetic disk; and registering a cache _ dev disk and a cache _ dev disk of the cache disk, and recovering the cache disk according to the maintained association relationship and the dirty data state identifier in the cache _ dev disk. The hot plug of the bcache disk can be realized, that is, the cached data before plugging can still be obtained after the hot plug.
Bibliography:Application Number: CN201911394304