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From Adi <>
Subject Bringing a new node to replace a dead node - streaming is very slow
Date Thu, 04 Nov 2010 18:03:47 GMT
          Environment - Cassandra 0.6.5 CentOS55 amazon ec2 image small.

I am bringing in a new node to replace a dead node. Using new IP and
deadNodeToken -1 as the InitialToken for the new node. The node has started
bootstrapping and I can see the seed node is streaming to the new node.

[root@ip-10-122-178-221 apache-cassandra-0.6.5]# bin/nodetool -h  seed_node
Mode: Normal
Streaming to: /new_node_ip
   /data/var/lib/cassandra/data/usertable/stream/data-138-Index.db 0/7604053
   /data/var/lib/cassandra/data/usertable/stream/data-138-Filter.db 0/393205
Not receiving any streams.

But the network IO shown using tcptrack shows just 10-11 KB/s of traffic.
1) Is there a way of speeding up this bootstrap process or some other
recommended way of replacing a dead node.
2) Is there a way to find the files a node should be having(say the ones
that show up in stream command) and just scp them to the new node.

Thank you for your time.


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