LevelDB-course-Lab

Sanjay Ghemawat 85584d497e Added bloom filter support. In particular, we add a new FilterPolicy class. An instance of this class can be supplied in Options when opening a database. If supplied, the instance is used to generate summaries of keys (e.g., a bloom filter) which are placed in sstables. These summaries are consulted by DB::Get() so we can avoid reading sstable blocks that are guaranteed to not contain the key we are looking for. This change provides one implementation of FilterPolicy based on bloom filters. Other changes: - Updated version number to 1.4. - Some build tweaks. - C binding for CompactRange. - A few more benchmarks: deleteseq, deleterandom, readmissing, seekrandom. - Minor .gitignore update.			12年前
..
win	reverting disastrous MOE commit, returning to r21	删除	13年前
README	reverting disastrous MOE commit, returning to r21		13年前
atomic_pointer.h	A number of fixes:		13年前
port.h	Platform detection during build, plus compatibility patches for machines without <cstdatomic>.		13年前
port_android.cc	A number of fixes:		13年前
port_android.h	Added bloom filter support.		12年前
port_example.h	A number of fixes:		13年前
port_posix.cc	A number of fixes:		13年前
port_posix.h	add .gitignore; support for building on a few BSD variants		12年前

README

This directory contains interfaces and implementations that isolate the
rest of the package from platform details.

Code in the rest of the package includes "port.h" from this directory.
"port.h" in turn includes a platform specific "port_<platform>.h" file
that provides the platform specific implementation.

See port_posix.h for an example of what must be provided in a platform
specific header file.