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From Mark Jones <MJo...@imagehawk.com>
Subject What is loadbalance supposed to do? 0.6.0RC1
Date Wed, 07 Apr 2010 13:48:13 GMT
It shouldn't remove a node from the ring should it?  (appears it did)
It shouldn't remove data from db, should it?  (data size appears to grow, but records are
now missing)

Loaded 38 million "rows" and the ring looked like this:

  mark@ec2:~/cassandra/apache-cassandra-0.6.0-rc1$ bin/nodetool --host 192.168.1.116 ring
  Address       Status     Load          Range                                      Ring
                                         167730615856220406399741259265091647472
  192.168.1.116 Up         4.81 GB       54880762918591020775962843965839761529     |<--|
  192.168.1.119 Up         12.96 GB      160455137948102479104219052453775170160    |   |
  192.168.1.12  Up         8.98 GB       167730615856220406399741259265091647472    |--

So I did this:
  mark@record:~/cassandra/apache-cassandra-0.6.0-rc1$ bin/nodetool --host 192.168.1.12 loadbalance

And this happened (even though Cassandra was still running):

  mark@record:~/cassandra/apache-cassandra-0.6.0-rc1$ bin/nodetool --host 192.168.1.12 ring
  Address       Status     Load          Range                                      Ring
                                         160455137948102479104219052453775170160
  192.168.1.116 Up         12.71 GB      54880762918591020775962843965839761529     |<--|
  192.168.1.119 Up         13.47 GB      160455137948102479104219052453775170160    |-->|

After restarting Cassandra on .12

  mark@record:~/cassandra/apache-cassandra-0.6.0-rc1$ bin/nodetool --host 192.168.1.12 ring
  Address       Status     Load          Range                                      Ring
                                         160455137948102479104219052453775170160
  192.168.1.116 Up         12.71 GB      54880762918591020775962843965839761529     |<--|
  192.168.1.12  Up         8.98 GB       107669873051407416105654071439122680093    |   |
  192.168.1.119 Up         13.47 GB      160455137948102479104219052453775170160    |-->|

Now I have more data, but nearly 50% of my queries are failing (not found).  This data was
checked before the load balance was done.

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