rocksdb

History

heyongqiang 6ba1f17789 adding a scribe logger in leveldb to log leveldb deploy stats Summary: as subject. A new log is written to scribe via thrift client when a new db is opened and when there is a compaction. a new option var scribe_log_db_stats is added. Test Plan: manually checked using command "ptail -time 0 leveldb_deploy_stats" Reviewers: dhruba Differential Revision: https://reviews.facebook.net/D4659		2012-08-21 11:43:22 -07:00
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env_hdfs.h	adding a scribe logger in leveldb to log leveldb deploy stats	2012-08-21 11:43:22 -07:00
hdfs.h	Make Leveldb save data into HDFS files. You have to set USE_HDFS in your environment variable to compile leveldb with HDFS support.	2012-06-14 00:29:01 -07:00
README	Create leveldb server via Thrift.	2012-07-07 09:42:39 -07:00

README

This directory contains the hdfs extensions needed to make leveldb store
files in HDFS.

The hdfs.h file is copied from the Apache Hadoop 1.0 source code. 
It defines the libhdfs library
(http://hadoop.apache.org/common/docs/r0.20.2/libhdfs.html) to access 
data in HDFS.  The libhdfs.a is copied from the Apache Hadoop 1.0 build. 
It implements the API defined in hdfs.h. If your hadoop cluster is running
a different hadoop release, then install these two files manually from your
hadoop distribution and then recompile leveldb.

The env_hdfs.h file defines the leveldb objects that are needed to talk to an
underlying filesystem. 

If you want to compile leveldb with hdfs support, please set the following
enviroment variables appropriately:
   USE_HDFS=1
   JAVA_HOME=/usr/local/jdk-6u22-64
   LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/jdk-6u22-64/jre/lib/amd64/server:/usr/local/jdk-6u22-64/jre/lib/amd64/:./snappy/libs
   make clean all db_bench

To run dbbench,
  set CLASSPATH to include your hadoop distribution
  db_bench --hdfs="hdfs://hbaseudbperf001.snc1.facebook.com:9000"