小组成员:10215300402-朱维清 & 10222140408 谷杰
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Release 1.2 2011-05-16
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Fixes for larger databases (tested up to one billion 100-byte entries,
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i.e., ~100GB).
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(1) Place hard limit on number of level-0 files. This fixes errors
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of the form "too many open files".
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(2) Fixed memtable management. Before the fix, a heavy write burst
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could cause unbounded memory usage.
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A fix for a logging bug where the reader would incorrectly complain
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about corruption.
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Allow public access to WriteBatch contents so that users can easily
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wrap a DB.
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