I am trying to store Counters CF from cassandra to Hive. Below is the
CREATE TABLE syntax in Hive:
DROP TABLE IF EXISTS Counters;
create external table Counters(row_key string, column_name string, value
string)
STORED BY 'org.apache.hadoop.hive.cassandra.CassandraStorageHandler'
WITH SERDEPROPERTIES ("cassandra.columns.mapping" = ":key,:column,:value",
"cassandra.ks.name" = "BAMSchema",
"cassandra.ks.repfactor" = "1",
"cassandra.ks.strategy" = "org.apache.cassandra.locator.SimpleStrategy",
"cassandra.cf.name" = "Counters" ,
"cassandra.host" = "127.0.0.1" ,
"cassandra.port" = "9160",
"cassandra.partitioner" = "org.apache.cassandra.dht.RandomPartitioner")
TBLPROPERTIES (
"cassandra.input.split.size" = "64000",
"cassandra.range.size" = "1000",
"cassandra.slice.predicate.size" = "1000");
and Counter CF is defined as :
create column family Counters
with comparator = UTF8Type
and default_validation_class=CounterColumnType
and replicate_on_write=true;
I am not able to import the Counter value in Hive. I am getting other
row_key and column_name properly.
Below is the output from Hive:
hive> select * from Counters;
OK
213_debit_1326690000 1-sess_count d
213_debit_1326690000 1-total_db_time
213_debit_1326690000 1-total_exec_time
213_debit_1326690000 1-txn_count
213_debit_1326690000 2-sess_count
213_debit_1326690000 2-total_db_time
213_debit_1326690000 2-total_exec_time
213_debit_1326690000 2-txn_count
Time taken: 0.263 seconds
Below is output from Cassandra:
[default@BAMSchema] list Counters;
Using default limit of 100
-------------------
RowKey: 213_debit_1326690000
=> (counter=1-sess_count, value=100)
=> (counter=1-total_db_time, value=20)
=> (counter=1-total_exec_time, value=30)
=> (counter=1-txn_count, value=1)
=> (counter=2-sess_count, value=30)
=> (counter=2-total_db_time, value=30)
=> (counter=2-total_exec_time, value=30)
=> (counter=2-txn_count, value=1)
As you can see that "d" junk letter is getting added in Hive when import
happens from Cassandra to Hive. Wondering what am I missing.
Thanks for your help!
