Re: How to migrate any relational database to Cassandra

s I'm thinking of a move to Cassandra like my move from dBase to >>>>> Delphi; >>>>> in other words there were concepts which modified how you write >>>>> applications. >>>>> >>>>> Now, you can do something similar to a SQL database, but I don't think >>>>> you >>>>> would >>>>> be leveraging the features of Cassandra. That said, I think there will >>>>> be >>>>> a new >>>>> generation of abstraction tools that will make modeling easier. >>>>> >>>>> A perhaps more practical answer: there is no one to one mapping between >>>>> SQL >>>>> and Cassandra. >>>>> >>>> >>>> >>>> >>> >>> >>> -- >>> Jonathan Ellis >>> Project Chair, Apache Cassandra >>> co-founder of Riptano, the source for professional Cassandra support >>> http://riptano.com >>> >> >> > -- Regards Peng Guo

Re: Cassandra-0.6.1 Crash Error: out of memory

e.apache.org/~eevans/<http://people.apache.org/%7Eeevans/> > until release is official later today) > - when you get a TimeoutException on the client, sleep 100ms or so > before retrying > - increase the max heap size > > On Tue, May 25, 2010 at 9:10 PM, Peng Guo wrote: > > >

Cassandra-0.6.1 Crash Error: out of memory

CassandraDaemon.java (line 78) Fatal exception in thread Thread[pool-1-thread-50,5,main] java.lang.OutOfMemoryError: Java heap space -- Regards Peng Guo

Re: Some questions about using Binary Memtable to import data.

wrote: > 1. yes > 2. yes > 3. compaction will slow down the load > 4. it will flush the memtable > > On Tue, May 18, 2010 at 12:24 AM, Peng Guo wrote: > > Hi All: > > > > I am trying to use Binary Memtable to import a large number of data. > > >

Some questions about using Binary Memtable to import data.

already exist in Cassandra? 3. What will happen if we not turn off compaction? 4. What will happen if the data beyond the limited of the BinaryMemtableThroughputInMB? Thanks. -- Regards Peng Guo

Re: How to use binaryMemTable to insert large data?

t didn't work? > > CassandraBulkLoader is a map/reduce program, so you'll need hadoop setup. > > On Sun, May 16, 2010 at 7:43 AM, Peng Guo wrote: > > I try the contrib\bmt_example\CassandraBulkLoader.java Example, but it > not > > work. > > > > Can i try contr

How to use binaryMemTable to insert large data?

I try the contrib\bmt_example\CassandraBulkLoader.java Example, but it not work. Can i try contrib\bmt_example\CassandraBulkLoader.java in a pc which is not a Cassandra server? -- Regards Peng Guo