Atomic incremental load for map-reduce systems on append-only file systems
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United States of America Patent
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Aug 23, 2016
Grant Date -
Mar 6, 2014
app pub date -
Aug 30, 2012
filing date -
Aug 30, 2012
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Abstract
Augmenting data files in a repository of an append-only file system comprises maintaining metadata corresponding to each data file for tracking a logical end-of-file (EOF) for each data file for appending. A global versioning mechanism for the metadata allows selecting the current version of the metadata to read for performing an append job for a set of data files. Each append job comprises multiple append tasks. For each successful append job, the global versioning mechanism increments a valid metadata version to use for each data file appended. Said valid metadata version indicates the logical EOF corresponding to a new physical EOF for each of the data files appended.
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