Anthony, very nice to see this, this is exactly the kind of thing I've started on a web UI!
I'll try to get more things done this week and post it somewhere for those who are interested. On Tue, May 4, 2010 at 2:49 PM, Anthony Molinaro <antho...@alumni.caltech.edu> wrote: > And just to show you what the dashboards look like here's a couple > of screen shots > > Jconsole like page of jvm stats > http://herbie.ddv.com/~anthonym/mondemand-2.png > > Cassandra specific memtable stats > http://herbie.ddv.com/~anthonym/mondemand-1.png > > -Anthony > > On Tue, May 04, 2010 at 10:03:52AM -0700, Michael Lum wrote: >> On 5/4/2010 7:21 AM, Eric Evans wrote: >> >On Tue, 2010-05-04 at 08:41 +0300, Ran Tavory wrote: >> >>How about the following compromise: >> >>Add a simple web server to each node with only one simple servlet that >> >>simply spits out all JMX stats on one page. Not fancy, no graphs, >> >>simply the same values you can get from jconsole, but on a web page. >> >>To me it seems like a fair tradeoff b/w maintenance and easier out of >> >>the box management. Shooting up jconsole for each server is >> >>cumbersome, at least in the environment I work in (firewalls, high >> >>latency etc) so a web interface can be nice. >> > >> >It still seems superfluous to me, but I'd be open to something >> >fire-and-forget (i.e. wouldn't need updating each time something new was >> >added). >> >> This is how we monitor our Cassandra clusters. Each Cassandra node runs >> a process that polls the JMX stats and then fires off events to a set of >> configured management nodes using either UDP or multicast, depending on >> the network. New Cassandra nodes in the same cluster and datacenter >> have the same config (and are configured centrally anyways), and the >> management nodes automatically add new nodes based on the events they >> receive, so all the graphs, dashboards, monitors, and downstream tools >> pick all of this up without needing a change. This way we don't need to >> fire up jconsole for hundreds of nodes and can do other interesting >> cluster-wide aggregations. Also, we don't have to remember to setup >> monitoring when the cluster grows. >> >> All the tools used are open source, and I'd be happy to share more >> detail if there is interest. > > -- > ------------------------------------------------------------------------ > Anthony Molinaro <antho...@alumni.caltech.edu> >
