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Published on 2009-12-04T14:51:19Z
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What happens when a new value for an existing column is added? Will the older value be overwritten by the new value? Or the older value will also retain and can be retrieved (similar to simpleDB)?
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When using the Perl module Net::Cassandra::Easy to interface with Cassandra I use the following code to read colums col[123] from rows row[123] in column-family Standard1:
my $cassandra = Net::Cassandra::Easy->new(keyspace => 'Keyspace1', server => 'localhost');
$cassandra->connect();
my…
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In Cassandra, I have the following Column Family:
<ColumnFamily CompareWith="TimeUUIDType" Name="Posts"/>
I'm trying to insert a record into it as follows using a C++ generated function generated by Thrift:
ColumnPath new_col;
new_col.__isset.column = true; /* this is required! */
new_col…
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I wrote a shell script that runs on remote host to build source code with 'ant build' command, and then distribute the built binary to other servers.
However, right after Ant build is over successfully(I can see the command line output saying Build was successful), the ssh session ends and whatever…
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I'm not managing to connect to cassandra from outside machines. The database is hosted on a windows machine and im trying to connect through a mac (but this shouldn't cause problems)
Local connection works:
C:\cassandra\bin>cassandra-cli
Starting Cassandra Client
Connected to: "Test Cluster"…
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The following is a complete catalogue of all log messages generated by Cassandra 0.6 when stress-testing a Cassandra installation over an extended period of time:
AntiEntropyService: Sending AEService tree for (,) to: []
CassandraDaemon: Binding thrift service to localhost/N.N.N.N:N
CassandraDaemon:…
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Hi all,
My system is Vista Business 32 bits SP2.
When I click "Windows update", I can see there are 2 available optional updates. If I click the link "2 optional updates are available" to see what the updates are, I get:
http://leodip.s3.amazonaws.com/windows%5Fupdate2.PNG
The details about the…
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I'm updating the IDs with new IDs, but I need to retain the same ID for the master record in table A and its dependents in table B.
The chunk bracketed by comments is the part I can't figure out. I need to update all the records in table B that share the same ID with the current record I'm looking…
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SQL Server 2008 R2 offers an impressive array of capabilities for developers that build upon key innovations introduced in SQL Server 2008. The SQL Server 2008 R2 Update for Developers Training Kit is ideal for developers who want to understand how to take advantage of the key improvements introduced…
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SQL Server 2008 R2 offers an impressive array of capabilities for developers that build upon key innovations introduced in SQL Server 2008. The SQL Server 2008 R2 Update for Developers Training Kit is ideal for developers who want to understand how to take advantage of the key improvements introduced…
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My company's IT department is mostly a Windows run operation and in order to become more secure, they are altering the way that the Macintosh computers login to our internal network so that they use Active Directory like their Windows counterparts.
I have been given Administrative permission on my…
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