In a non dev system it's a lot easier to use the packages http://wiki.apache.org/cassandra/DebianPackaging http://www.datastax.com/docs/0.8/install/packaged_releases
Cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 12 Aug 2011, at 02:30, Martin Lansler wrote: > (Note: This is a repost from another thread which did not have a > relevant subject, sorry for the spamming) > > Hi Eldad / All, > > On Wed, Aug 10, 2011 at 8:32 AM, Eldad Yamin <elda...@gmail.com> wrote: >> Can you please explain how did you upgraded. something like step-by-step. >> Thanks! > > I took the liberty of replying to the group as it would be interesting > to hear how other folks out there are doing it... > > I'm *not* running a prod system, just a test system of three nodes on > my laptop. So it would be nice to hear about real setups. Here is my > test setup: > > apache-cassandra -> apache-cassandra-0.8.3 > apache-cassandra-0.8.2/ > apache-cassandra-0.8.3/ > node1/ > node2/ > node3/ > > All nodeX look like: > bin -> ../apache-cassandra/bin/ > commitlog/ > conf/ > data/ > interface -> ../apache-cassandra/interface/ > lib -> ../apache-cassandra/lib/ > saved_caches/ > > The 'conf' directory is copied into each node from the virgin > cassandra distribution. I then create a local GIT repo and add the > 'conf' directory so I can track any configuration changes on a node. > Then relevant node specific configuration settings are set. The > 'commitlog', 'data' and 'saved_caches' are created by cassandra and > must be configured in 'cassandra.yaml' for each node. > > When I upgrade I do the following: > > 1. > Make a diff of the new conf files from the new version so that get > new parameters etc... I use emacs ediff-mode. > 2. > Remove the old "apache-cassandra" symlink and point it to the new cassandra > dist > 3. > In a rolling fashion stop one node, and then restart it... as the > symlink is changes it will then boot with the upgraded cassandra dist. > (remember to cd out & in of the bin/ dir otherwise you will still be > in the old directory). > (4). > Should something break... just re-create the old symlink and restart > the node (provided cassandra has not performed any non backwards > compatible changes to the db files, should be noted in the README) > > That's pretty much it. > > On a prod setup one would probably use a tool such as puppet > (www.puppetlabs.com/) to ease setting up on many nodes... But there > are many ways to do this, for instance pssh > (http://code.google.com/p/parallel-ssh/). > > Regards, > -Martin
