A library that provides an embeddable, persistent key-value store for fast storage.
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gjain 92368ab8a2 Add db_dump tool to dump DB keys
Summary:
Create a tool to iterate through keys and dump values. Current options
as follows:

db_dump --start=[START_KEY] --end=[END_KEY] --max_keys=[NUM] --stats
[PATH]

START_KEY: First key to start at
END_KEY: Key to end at (not inclusive)
NUM: Maximum number of keys to dump
PATH: Path to leveldb DB

The --stats command line argument prints out the DB stats before dumping
the keys.

Test Plan:
- Tested with invalid args
- Tested with invalid path
- Used empty DB
- Used filled DB
- Tried various permutations of command line options

Reviewers: dhruba, heyongqiang

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D5643
2012-09-27 09:53:58 -07:00
db If ReadCompaction is switched off, then it is better to not even submit background compaction jobs. 2012-09-25 11:07:01 -07:00
doc merge 1.5 2012-08-28 11:43:33 -07:00
hdfs Allow a configurable number of background threads. 2012-09-19 15:51:08 -07:00
helpers/memenv A number of fixes: 2011-10-31 17:22:06 +00:00
include/leveldb The BackupAPI should also list the length of the manifest file. 2012-09-25 03:13:25 -07:00
port put log in a seperate dir 2012-09-06 17:52:08 -07:00
scribe fix db_test error with scribe logger turned on 2012-08-28 11:22:58 -07:00
snappy Build with gcc-4.7.1-glibc-2.14.1. 2012-09-17 10:56:26 -07:00
table Clean up compiler warnings generated by -Wall option. 2012-08-29 14:24:51 -07:00
thrift Expose new configration variables via the thrift api 2012-08-17 10:29:12 -07:00
tools Add db_dump tool to dump DB keys 2012-09-27 09:53:58 -07:00
util The BackupAPI should also list the length of the manifest file. 2012-09-25 03:13:25 -07:00
.arcconfig Support arcdiff. 2012-05-09 23:35:05 -07:00
.gitignore Added bloom filter support. 2012-04-17 08:36:46 -07:00
AUTHORS reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
build_detect_platform build scribe with thrift lib Summary: 2012-09-06 17:41:53 -07:00
build_detect_version Record the version of the source repository that was used to build the leveldb library. 2012-08-24 15:18:43 -07:00
fbcode.gcc471.sh Use correct version of jemalloc. 2012-09-17 15:00:19 -07:00
fbcode.sh Do not use scribe for release builds. 2012-09-04 16:33:49 -07:00
LICENSE reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
Makefile Add db_dump tool to dump DB keys 2012-09-27 09:53:58 -07:00
NEWS sync with upstream @ 21409451 2011-05-21 02:17:43 +00:00
README @20776309 2011-04-20 22:48:11 +00:00
README.fb Release 1.5.3.fb. 2012-09-25 08:30:46 -07:00
TODO A number of smaller fixes and performance improvements: 2011-06-22 02:36:45 +00:00

leveldb: A key-value store
Authors: Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)

The code under this directory implements a system for maintaining a
persistent key/value store.

See doc/index.html for more explanation.
See doc/impl.html for a brief overview of the implementation.

The public interface is in include/*.h.  Callers should not include or
rely on the details of any other header files in this package.  Those
internal APIs may be changed without warning.

Guide to header files:

include/db.h
    Main interface to the DB: Start here

include/options.h
    Control over the behavior of an entire database, and also
    control over the behavior of individual reads and writes.

include/comparator.h
    Abstraction for user-specified comparison function.  If you want
    just bytewise comparison of keys, you can use the default comparator,
    but clients can write their own comparator implementations if they
    want custom ordering (e.g. to handle different character
    encodings, etc.)

include/iterator.h
    Interface for iterating over data. You can get an iterator
    from a DB object.

include/write_batch.h
    Interface for atomically applying multiple updates to a database.

include/slice.h
    A simple module for maintaining a pointer and a length into some
    other byte array.

include/status.h
    Status is returned from many of the public interfaces and is used
    to report success and various kinds of errors.

include/env.h
    Abstraction of the OS environment.  A posix implementation of
    this interface is in util/env_posix.cc

include/table.h
include/table_builder.h
    Lower-level modules that most clients probably won't use directly