4b51dffcf8
Summary: Plain table has been working well and this is just a nit-picking patch, which is generated during my coding reading. No real functional changes. only some changes regarding: * Improve some comments from the perspective a "new" code reader. * Change some magic number to constant, which can help us to parameterize them in the future. * Did some style, naming, C++ convention changes. * Fix warnings from new "arc lint" Test Plan: make check Reviewers: sdong, haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D15429