Cassandra.ToolsAboutKnowledge Base


tomekkup/helenos (164)
License:GLP v2



Helenos is a free web based environment that simplifies a data exploring & schema managament with Apache Cassandra database.

Features list

  • Exploring schema
  • Viewing properties of keyspaces and column families
  • Add / remove / truncate column family
  • Add / Drop keyspace
  • Data browsing via:

    • keyRange
    • predicate
  • Results pagination
  • CQL support
  • Authentication
  • Admin and read only roles

Current version


Important: when upgrading to version 1.5 or above please note that you'll lose all your configuration (stored in local sql db). Please read changelog...


See here for all changes in current and all previous releases


Packages are available to download via as WAR files and Apache Tomcat bundles.


![CF properties] ( ![CQL] ( ![Browse] (

Click here for preview on Youtube


  • Make sure that a user account which your application server runs as, has write permission to home directory
  • Download war package and deploy to your servlet container (tested with Jetty 8, Tomcat 6, Resin 4)
  • When running on Resin, additionally make sure that fileServlet is enabled and configured (see web.xml or Resin manual)
  • Start app
  • Make sure your web browser supports Flash 10
  • Open your web browser to http://localhost:8080/{yourdeploypath}/index.html
  • Sign in with your credentials (default is admin:admin)
  • Edit your connections by clicking icon in upper right corner
  • After editing click button 'Connect to'

Building manually

You can build manually with Maven but first install all prerequisities:

Next download this archive: [] ( and unpack to directory src/main/frontend/contribs and change destination folder name to 'dialog'. Next apply patch file 'src/main/frontent/Login.js.patch'.

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