You overwrite your columns by writing new row/supercolumn.
Remove new row/supercolumn from "for" statement, which is for columns:
int rowKey = 10;
int superColumnKey = 20;
usersWriter.newRow(ByteBufferUtil.bytes(rowKey));
usersWriter.newSuperColumn(ByteBufferUtil.bytes(superColumnKey));
for (int i = 0; i < 10; i++) {
usersWriter.addColumn(
ByteBufferUtil.bytes(i+1),
ByteBufferUtil.bytes(i+1),
System.currentTimeMillis());
}
usersWriter.close();
Next time ask such questions in user mail list, not C* devs, which is for C*
development, not usage/your code development around Cassandra.
Best regards / Pagarbiai
Viktor Jevdokimov
Senior Developer
Email: [email protected]
Phone: +370 5 212 3063
Fax: +370 5 261 0453
J. Jasinskio 16C,
LT-03163 Vilnius,
Lithuania
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message in error, please contact the sender immediately and irrevocably delete
this message and any copies.-----Original Message-----
From: José Elias Queiroga da Costa Araújo [mailto:[email protected]]
Sent: Wednesday, October 9, 2013 11:22 PM
To: dev
Subject: Problems in the cassandra bulk loader
Hi all,
I'm trying to use the bulk insertion with the
SSTableSimpleUnsortedWriter class from cassandra API and I facing some
problems. After generating and uploading the .db files by using the
./sstableloader command , I noticed the data didn't match with inserted one.
I put the used code below to try to explain the bahaviour.
I'm trying to generate the data files using only one rowkey and one
supercolumn. Where the super column has 10 columns.
IPartitioner p = new Murmur3Partitioner(); CFMetaData scf = new
CFMetaData("myKeySpace", "Column", ColumnFamilyType.Super, BytesType.instance,
BytesType.instance);
SSTableSimpleUnsortedWriter usersWriter = new SSTableSimpleUnsortedWriter(new
File("./"), scf, p,64);
int rowKey = 10;
int superColumnKey = 20;
for (int i = 0; i < 10; i++) {
usersWriter.newRow(ByteBufferUtil.bytes(rowKey));
usersWriter.newSuperColumn(ByteBufferUtil.bytes(superColumnKey));
usersWriter.addColumn(ByteBufferUtil.bytes(i+1),ByteBufferUtil.bytes(i+1),
System.currentTimeMillis());
}
usersWriter.close();
After uploading, the result is:
RowKey: 0000000a
=> (super_column=00000014,
(name=00000001, value=00000001,
timestamp=1381348293144))
1 Row Returned.
In this case, my super column should have 10 columns? With
values between 00000001 to 00000011? Since I'm using the same super column.
The documentation says the newRow method could be invoked many times, it
impacts only the performance.
The second question is: If this is the correct behavior, the
column value should be 00000011, since it is the last value passed as argument
to addColumn(...) method in the loop?
Thanks in the advance,
Elias.
