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Better comment for inplace_update_support

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Summary: See https://github.com/facebook/rocksdb/issues/215

Test Plan: none

Reviewers: dhruba, sdong, ljin, yhchiang, nkg-

Reviewed By: nkg-

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20769
This commit is contained in:
Igor Canadi 2014-07-30 09:32:47 -07:00
parent 91c01485d1
commit 99e03bcbf1
1 changed files with 3 additions and 1 deletions
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4
include/rocksdb/options.h
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@ -487,7 +487,9 @@ struct ColumnFamilyOptions {
TablePropertiesCollectorFactories; TablePropertiesCollectorFactories;
TablePropertiesCollectorFactories table_properties_collector_factories; TablePropertiesCollectorFactories table_properties_collector_factories;
// Allows thread-safe inplace updates. // Allows thread-safe inplace updates. If this is true, there is no way to
// achieve point-in-time consistency using snapshot or iterator (assuming
// concurrent updates).
// If inplace_callback function is not set, // If inplace_callback function is not set,
// Put(key, new_value) will update inplace the existing_value iff // Put(key, new_value) will update inplace the existing_value iff
// * key exists in current memtable // * key exists in current memtable