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)
env: # environment variables (OPTIONAL)
CLASSPATH: $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
HBASE_LIB_DIR: /home/kewang/hbase/lib
HBASE_CONF_DIR: /home/kewang/hbase/conf
LD_LIBRARY_PATH: $LD_LIBRARY_PATH:/usr/lib/jvm/java-7-oracle/jre/lib/amd64/server
mysqltest:
type: mysql
username: root
password: MY_PASSWORD
host: localhost
database: hedistest
env:
LD_LIBRARY_PATH: $LD_LIBRARY_PATH:/usr/lib/x86_64-linux-gnu
otherdb:
type: gooddbBefore you make the hedis, please clean the dependencies first in order to rebuild dependencies. "make" does not rebuild dependencies automatically, even if something in the source code of dependencies is changes.
make distcleanAfter clean the dependencies, build the hedis using "make" command.
makeredis-server --hedis hedis.ymlGET [CONNECTOR-NAME]://(INVALIDATE-SIGN)[CONNECTOR-COMMAND]# HBase example:
#
# get "kewang" rowkey at "user" table on "cdh1" connector
GET "cdh1://user@kewang"
# HBase example:
#
# get "kewang" rowkey at "user" table on "cdh1" connector, again
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.