Hedis stands for "Hyper Redis". It can retrieve data from ANY database directly and stores to itself.
Traditionally, application server retrieves hot data from in-memory database (like Redis) to reduce unnecessary paths. If in-memory database doesn't have specific data, application server gets back to retrieve data from original database.
Hedis can retrieve data from ANY database directly. Application server retrieves hot data from Hedis server, If Hedis server doesn't have specific data, Hedis retrieves data from original database via ANY connector.
cdh1: # connector name (required)
type: hbase # connector type (required)
zookeeper: localhost:2181 # other configuration (depends on its type)
mysqltest:
type: mysql
username: root
password: MY_PASSWORD
host: localhost
database: hedistest
otherdb:
type: gooddbSets environment variables on various connectors
# HBase environment variables
export CLASSPATH=/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/async-1.4.0.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/asynchbase-1.5.0-libhbase-20140311.193218-1.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/commons-configuration-1.6.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/commons-lang-2.5.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/commons-logging-1.1.1.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/hadoop-core-1.0.4.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/hbase-0.94.17.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/libhbase-1.0-SNAPSHOT.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/log4j-1.2.17.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/netty-3.8.0.Final.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/protobuf-java-2.5.0.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/slf4j-api-1.7.5.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/slf4j-log4j12-1.7.5.jar:/home/kewang/git/libhbase/target/libhbase-1.0-SNAPSHOT/lib/zookeeper-3.4.5.jar
export HBASE_LIB_DIR=/home/kewang/hbase/lib
export HBASE_CONF_DIR=/home/kewang/hbase/conf
export LD_LIBRARY_PATH=/usr/lib/jvm/java-7-oracle/jre/lib/amd64/server
# MySQL environment variables
export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnuredis --hedis hedis.ymlGET [connector-name]://[connector-command]# HBase example:
#
# get "kewang" rowkey at "user" table on "cdh1" connector
GET "cdh1://user:kewang"
# MySQL example:
#
# Query one record at "user" table on "mysqltest" connector
GET "mysqltest://select * from user limit 1"TODO
This is a modified version of Redis, maintaining by Kewang now.
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