You can run JConsole on your workstation and connect remotely to the nodes, it does not need to be run on the node itself. Connecting is discussed here http://wiki.apache.org/cassandra/MemtableThresholds and some help for connecting is here http://wiki.apache.org/cassandra/JmxGotchas
There is also a Web front end for the JMX service http://wiki.apache.org/cassandra/Operations#Monitoring_with_MX4J
And a recent discussion on different way to monitor a node http://www.mail-archive.com/user@cassandra.apache.org/msg08100.html If you did through there is some talk about a JMX<>REST bridge.
Hope that helps.
Aaron
On 25 Jan, 2011,at 04:17 PM, buddhasystem <potek...@bnl.gov> wrote:
Thanks Aaron. As I remarked earlier (and it seems it not uncommon) none of
the nodes have X11 installed (I think I could arrange this, but it's a bit
of a hassle). So if I understand correctly, jconsole is a X11 app, and I'm
out of luck with that.
I would agree with you that having a proper nodetool command to zap the data
you know you don't need, would be quite ideal. The reason I'm so retentive
about it is that I plan to test scaling up to 250 million rows, and disk
space matters.
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