memcached vs redis
memcached (a kind of DB, so it can run on memory, but usually for web objects):
Debian/Ubuntu:
apt-get install libevent-dev
#or apt-get install libevent libevent-deve
apt-get install memcached
* http://www.runoob.com/memcached/java-memcached.html
Redhat/Centos:
yum install libevent-devel
yum install memcached
bitbucket vs jira vs bamboo vs jenkins (continuous integration):
