Distributed shared log for modern storage servers
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United States of America Patent
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Oct 31, 2017
Grant Date -
Oct 13, 2016
app pub date -
Apr 10, 2015
filing date -
Apr 10, 2015
priority date (Note) -
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Abstract
Disclosed herein are system, method, and computer program product embodiments for accessing a distributed shared log that supports a total order over log writes and multiple logical log streams. An embodiment operates by selecting a range of log entries for a logical log stream from the distributed shared log and mapping the selected range of log entries to associated storage units in a plurality of storage units. The selected range of log entries are stored at the associated storage units according to metadata that indexes the selected range of log entries by logical log stream. The selected range of log entries are then requested from the associated storage units based on the mapping. The selected range of log entries for the logical log stream are then returned from the associated storage units based on a scan of the metadata. The received log entries are then reassembled.
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