rocksdb

fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

Islam AbdelRahman 0522990358 Improve sst_dump help message Summary: Current Message ``` sst_dump [--command=check\|scan\|none\|raw] [--verify_checksum] --file=data_dir_OR_sst_file [--output_hex] [--input_key_hex] [--from=<user_key>] [--to=<user_key>] [--read_num=NUM] [--show_properties] [--show_compression_sizes] [--show_compression_sizes [--set_block_size=<block_size>]] ``` New message ``` sst_dump --file=<data_dir_OR_sst_file> [--command=check\|scan\|raw] --file=<data_dir_OR_sst_file> Path to SST file or directory containing SST files --command=check\|scan\|raw check: Iterate over entries in files but dont print anything except if an error is encounterd (default command) scan: Iterate over entries in files and print them to screen raw: Dump all the table contents to <file_name>_dump.txt --output_hex Can be combined with scan command to print the keys and values in Hex --from=<user_key> Key to start reading from when executing check\|scan --to=<user_key> Key to stop reading at when executing check\|scan --read_num=<num> Maximum number of entries to read when executing check\|scan --verify_checksum Verify file checksum when executing check\|scan --input_key_hex Can be combined with --from and --to to indicate that these values are encoded in Hex --show_properties Print table properties after iterating over the file --show_compression_sizes Independent command that will recreate the SST file using 16K block size with different compressions and report the size of the file using such compression --set_block_size=<block_size> Can be combined with --show_compression_sizes to set the block size that will be used when trying different compression algorithms ``` Test Plan: none Reviewers: yhchiang, andrewkr, kradhakrishnan, yiwu, sdong Reviewed By: sdong Subscribers: andrewkr, dhruba Differential Revision: https://reviews.facebook.net/D56325		9 years ago
arcanist_util	Updated all copyright headers to the new format.	9 years ago
build_tools	Add support for UBsan builds to RocksDB	9 years ago
coverage	Fix coverage script	10 years ago
db	Embed column family name in SST file	9 years ago
doc	Lint everything	9 years ago
examples	Adding pin_l0_filter_and_index_blocks_in_cache feature and related fixes.	9 years ago
hdfs	instructing people to use java7 for hdfs (#1063 )	9 years ago
include/rocksdb	Update comments on include/rocksdb/perf_context.h	9 years ago
java	Merge pull request #1053 from adamretter/benchmark-java-comparator	9 years ago
memtable	Updated all copyright headers to the new format.	9 years ago
port	Fixed compile warnings in posix_logger.h and coding.h	9 years ago
table	Change default number of cache shard bit to be 6 and max_file_opening_threads to be 16.	9 years ago
third-party	Fix the build break on Ubuntu 15.10 when gcc 5.2.1 is used	9 years ago
tools	Improve sst_dump help message	9 years ago
util	Change default number of cache shard bit to be 6 and max_file_opening_threads to be 16.	9 years ago
utilities	fix wrong assignment of level0_stop_writes_trigger in spatialdb (#1061 )	9 years ago
.arcconfig	Integrate Jenkins with Phabricator	10 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	Ignore db_test2	9 years ago
.travis.yml	Travis CI to disable ROCKSDB_LITE tests	9 years ago
AUTHORS	Add AUTHORS file. Fix #203	10 years ago
CMakeLists.txt	Add unit tests for RepairDB	9 years ago
CONTRIBUTING.md	facebook accounts are not required for CLA signers	10 years ago
DEFAULT_OPTIONS_HISTORY.md	Change default number of cache shard bit to be 6 and max_file_opening_threads to be 16.	9 years ago
DUMP_FORMAT.md	First version of rocksdb_dump and rocksdb_undump.	10 years ago
HISTORY.md	Change some RocksDB default options	9 years ago
INSTALL.md	Simple changes to support builds for ppc64[le] consistent with X86	9 years ago
LANGUAGE-BINDINGS.md	Merge pull request #1056 from facebook/igorcanadi-patch-1	9 years ago
LICENSE	Updated all copyright headers to the new format.	9 years ago
Makefile	Add support for UBsan builds to RocksDB	9 years ago
PATENTS	Update Patent Grant.	10 years ago
README.md	Replaced "built on on earlier work" by "built on earlier work" in README.md	10 years ago
ROCKSDB_LITE.md	Optimistic Transactions	10 years ago
USERS.md	Added quasardb to the USERS.md file	9 years ago
Vagrantfile	RocksDB on FreeBSD support	10 years ago
WINDOWS_PORT.md	Commit both PR and internal code review changes	9 years ago
appveyor.yml	Exclude DBTest.FileCreationRandomFailure as a long running test	9 years ago
src.mk	Merge pull request #1026 from SherlockNoMad/Hist	9 years ago
thirdparty.inc	Latest versions of Jemalloc library do not require je_init()/je_unint()	9 years ago

README.md

RocksDB: A Persistent Key-Value Store for Flash and RAM Storage

RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)

This code is a library that forms the core building block for a fast key value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it specially suitable for storing multiple terabytes of data in a single database.

Start with example usage here: https://github.com/facebook/rocksdb/tree/master/examples

See the github wiki for more explanation.

The public interface is in include/. 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.

Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/