Re: cluster IP question and Jconsole?

2011-04-20 Thread tinhuty he 

Maki,

Yes you are right, 8081 is mx4j port, the JMX_PORT is 8001 in the 
cassandra-env.sh.


in the cassandra Linux server itself, I can run this successfully:
nodetool -host x -p 8001 ring
x is the actually IP address

however when I run the same command in another windows machine(which has the 
cassandra windows version extracted), I am getting exception like below, one 
thing puzzled me is that the command trying to connect to ip x, but the 
exception claimed: "Connection refused to host: 127.0.0.1". Is there 
anything else that I need to config or...? I guess this is probably the 
reason that jconsole can't connect to port 8001 remotely either? Thanks for 
any advice!


D:\apache-cassandra-0.7.4\bin>nodetool -host x -p 8001 ring
Starting NodeTool
Error connection to remote JMX agent!
java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested 
exception is:

   java.net.ConnectException: Connection refused: connect
   at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
   at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
   at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
   at sun.rmi.server.UnicastRef.invoke(Unknown Source)
   at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown 
Source)
   at javax.management.remote.rmi.RMIConnector.getConnection(Unknown 
Source)

   at javax.management.remote.rmi.RMIConnector.connect(Unknown Source)
   at javax.management.remote.JMXConnectorFactory.connect(Unknown 
Source)

   at org.apache.cassandra.tools.NodeProbe.connect(NodeProbe.java:137)
   at org.apache.cassandra.tools.NodeProbe.(NodeProbe.java:107)
   at org.apache.cassandra.tools.NodeCmd.main(NodeCmd.java:511)
Caused by: java.net.ConnectException: Connection refused: connect
   at java.net.PlainSocketImpl.socketConnect(Native Method)
   at java.net.PlainSocketImpl.doConnect(Unknown Source)
   at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
   at java.net.PlainSocketImpl.connect(Unknown Source)
   at java.net.SocksSocketImpl.connect(Unknown Source)
   at java.net.Socket.connect(Unknown Source)
   at java.net.Socket.connect(Unknown Source)
   at java.net.Socket.(Unknown Source)
   at java.net.Socket.(Unknown Source)
   at 
sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown Source)
   at 
sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown Source)

   ... 11 more



-Original Message- 
From: Watanabe Maki

Sent: Saturday, April 16, 2011 1:45 AM
To: user@cassandra.apache.org
Cc: 
Subject: Re: cluster IP question and Jconsole?

8081 is your mx4j port, isn't it? You need to connect jconsole to JMX_PORT 
specified in cassandra-env.sh.


maki


From iPhone



On 2011/04/16, at 13:56, tinhuty he  wrote:

Maki, thanks for your reply. for the second question, I wasn't using the 
loopback address, I was using the actually IP address for that server. I 
am able to telnet to that IP on port 8081, but using jconsole failed.


-Original Message- From: Maki Watanabe
Sent: Friday, April 15, 2011 9:43 PM
To: user@cassandra.apache.org
Cc: tinhuty he
Subject: Re: cluster IP question and Jconsole?

127.0.0.2 to 127.0.0.5 are valid IP addresses. Those are just alias
addresses for your loopback interface.
Verify:
% ifconfig -a

127.0.0.0/8 is for loopback, so you can't connect this address from
remote machines.
You may be able configure SSH port forwarding from your monitroing
host to cassandra node though I haven't try.

maki

2011/4/16 tinhuty he :

I have followed the description here
http://www.edwardcapriolo.com/roller/edwardcapriolo/entry/lauching_5_node_cassandra_clusters
to created 5 instances of cassandra in one CentOS 5.5 machine. using
nodetool shows the 5 nodes are all running fine.

Note the 5 nodes are using IP 127.0.0.1 to 127.0.0.5. I understand 
127.0.0.1
is pointing to local server, but how about 127.0.0.2 to 127.0.0.5? looks 
to

me that they are not valid IP? how come all 5 nodes are working ok?

Another question. I have installed MX4J in instance 127.0.0.1 on port 
8081.
I am able to connect to http://server:8081/ from the browser. However how 
do

I connect using Jconsole that was installed in another windows
machines?(since my CentOS5.5 doesn't have X installed, only SSH allowed).

Thanks.

Re: cluster IP question and Jconsole?

2011-04-15 Thread tinhuty he 
Maki, thanks for your reply. for the second question, I wasn't using the 
loopback address, I was using the actually IP address for that server. I am 
able to telnet to that IP on port 8081, but using jconsole failed.


-Original Message- 
From: Maki Watanabe

Sent: Friday, April 15, 2011 9:43 PM
To: user@cassandra.apache.org
Cc: tinhuty he
Subject: Re: cluster IP question and Jconsole?

127.0.0.2 to 127.0.0.5 are valid IP addresses. Those are just alias
addresses for your loopback interface.
Verify:
 % ifconfig -a

127.0.0.0/8 is for loopback, so you can't connect this address from
remote machines.
You may be able configure SSH port forwarding from your monitroing
host to cassandra node though I haven't try.

maki

2011/4/16 tinhuty he :

I have followed the description here
http://www.edwardcapriolo.com/roller/edwardcapriolo/entry/lauching_5_node_cassandra_clusters
to created 5 instances of cassandra in one CentOS 5.5 machine. using
nodetool shows the 5 nodes are all running fine.

Note the 5 nodes are using IP 127.0.0.1 to 127.0.0.5. I understand 
127.0.0.1
is pointing to local server, but how about 127.0.0.2 to 127.0.0.5? looks 
to

me that they are not valid IP? how come all 5 nodes are working ok?

Another question. I have installed MX4J in instance 127.0.0.1 on port 
8081.
I am able to connect to http://server:8081/ from the browser. However how 
do

I connect using Jconsole that was installed in another windows
machines?(since my CentOS5.5 doesn't have X installed, only SSH allowed).

Thanks.

cluster IP question and Jconsole?

2011-04-15 Thread tinhuty he 
I have followed the description here 
http://www.edwardcapriolo.com/roller/edwardcapriolo/entry/lauching_5_node_cassandra_clusters 
to created 5 instances of cassandra in one CentOS 5.5 machine. using 
nodetool shows the 5 nodes are all running fine.


Note the 5 nodes are using IP 127.0.0.1 to 127.0.0.5. I understand 127.0.0.1 
is pointing to local server, but how about 127.0.0.2 to 127.0.0.5? looks to 
me that they are not valid IP? how come all 5 nodes are working ok?


Another question. I have installed MX4J in instance 127.0.0.1 on port 8081. 
I am able to connect to http://server:8081/ from the browser. However how do 
I connect using Jconsole that was installed in another windows 
machines?(since my CentOS5.5 doesn't have X installed, only SSH allowed).


Thanks.

which nodes contain the data? column family as indexes?

2011-04-14 Thread tinhuty he 
I just started 5 nodes in a cluster and set a replica factor of 3 on a keyspace 
ks. My question is how do I know which 3 nodes will contain the data of this 
keyspace(or particular column family in this keyspace)? 

I often read that “use a separate column family for storing our indexes”, here 
is link for that(http://www.datastax.com/docs/0.7/data_model/cfs_as_indexes), 
but it doesn’t have more details. Could some one point me to more detailed 
documentation and samples for this?

Thanks