from:"Filippo Diotalevi"

Re: Migrating to a new cluster (using SSTableLoader or other approaches)

2012-08-16 Thread Filippo Diotalevi

with DEBUG level logging and post the logs ? Thank Aaron. Which nodetool command are you referring to? (info, cfstats, ring,….) Do I modify the log4j-tools.properties in $CASSANDRA_HOME/conf to set the nodetool logs to DEBUG? Thanks, -- Filippo Diotalevi On Wednesday, 15 August 2012 at 22:53

Re: Migrating to a new cluster (using SSTableLoader or other approaches)

2012-08-16 Thread Filippo Diotalevi

) at org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:80) DEBUG [ScheduledTasks:1] 2012-08-16 22:01:08,571 LoadBroadcaster.java (line 86) Disseminating load info ... -- Filippo Diotalevi On Wednesday, 15 August 2012 at 22:53, aaron morton wrote: WARN 09:02:38,534 Unable to instantiate cache

Migrating to a new cluster (using SSTableLoader or other approaches)

2012-08-15 Thread Filippo Diotalevi

) at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30) ... 3 more --- What's the correct approach to migrate data from one cluster to another? How can I troubleshoot the problem with sstableloader? Thanks, -- Filippo Diotalevi

Re: Is large number of columns per row a problem?

2012-08-02 Thread Filippo Diotalevi

and, in worst cases, OOM. -- Filippo Diotalevi

Nodes marked dead…. leap second?

2012-07-02 Thread Filippo Diotalevi

https://twitter.com/redditstatus/status/219244389044731904 ) I'm running Ubuntu 10.04.3 LTS. Many thanks, -- Filippo Diotalevi

Maximum load per node

2012-06-07 Thread Filippo Diotalevi

kind of performance degradation can we expect for a Cassandra node which is overloaded? (f.i. with 500GB or more of data) Thanks for the clarifications, -- Filippo Diotalevi

Re: Query

2012-06-06 Thread Filippo Diotalevi

ArrayListColumnFamilyDefinition(); columns.add(columnFamily1); KeyspaceDefinition testKeyspace = HFactory.createKeyspaceDefinition(keyspace, org.apache.cassandra.locator.SimpleStrategy.class.getName(), 1, columns); cluster.addKeyspace(testKeyspace); -- Filippo Diotalevi On Wednesday, 6 June 2012 at 07:05

Re: cassandra-hadoop mapper

2012-05-31 Thread Filippo Diotalevi

Hi, yes, the work can be split between different mappers, but each one will process one row at the time. In fact, the method public void map(ByteBuffer key, SortedMapByteBuffer, IColumn columns, Context context) processes 1 row, with the specified ByteBuffer key and the list of columns

Re: RE Ordering counters in Cassandra

2012-05-22 Thread Filippo Diotalevi

Thanks for all the answers, they definitely helped. Just out of curiosity, is there any underlying architectural reason why it's not possible to order a row based on its counters values? or is it something that might be in the roadmap in the future? -- Filippo Diotalevi On Tuesday, 22

Ordering counters in Cassandra

2012-05-21 Thread Filippo Diotalevi

. Is there any trick to solve this problem? Maybe a way to retrieve the row ordering for counter values? Thanks, -- Filippo Diotalevi

Re: RE Ordering counters in Cassandra

2012-05-21 Thread Filippo Diotalevi

, but since I have many of these wide rows (1 per day), the process is extremely slow as it involves moving an entire row from Cassandra to client, inverting every column, and sending the data back to create the inversed index. -- Filippo Diotalevi On Monday, 21 May 2012 at 17:19, Romain HARDOUIN

Re: RE Ordering counters in Cassandra

2012-05-21 Thread Filippo Diotalevi

you might "lose" the pointer to the column to delete. --Filippo Diotalevi On Monday, 21 May 2012 at 18:51, Tamar Fraenkel wrote: I also had a similar problem. I have a temporary solution, which