cassandra學習筆記

cassandra學習

一、簡介

http://cassandra.apache.org/doc/latest/
https://www.tutorialspoint.com/cassandra/cassandra_data_model.htm

存儲結構

CREATE TABLE example (
  A text,
  B text,
  C text,
  D text,
  E text,
  F text,
  PRIMARY KEY ((A,B),C,D)
  );

 INSERT INTO example(A,B,C,D,E,F) VALUES ('a','b','c','d','e','f');
 INSERT INTO example(A,B,C,D,E,F) VALUES ('a','b','c','g','h','j');
 INSERT INTO example(A,B,C,D,E,F) VALUES ('a','b','j','k','l','m');
 INSERT INTO example(A,B,C,D,E,F) VALUES ('a','n','o','p','q','r');
 INSERT INTO example(A,B,C,D,E,F) VALUES ('s','t','u','v','w','x');

二、下載地址

http://www.apache.org/dyn/closer.lua/cassandra/2.2.8/apache-cassandra-2.2.8-bin.tar.gz

三、啓動

1）進入~/apache-cassandra-2.2.8/bin 目錄：

命令	備註
./cassandra	啓動
./cqlsh localhost	連接cassandra

2）執行./cassandra 啓動命令：

➜  bin ./cassandra
INFO  13:10:18 Create new Keyspace: KSMetaData{name=system_traces, strategyClass=SimpleStrategy, strategyOptions={replication_factor=2}, cfMetaData={sessions=org.apache.cassandra.config.CFMetaData@758a3875[cfId=c5e99f16-8677-3914-b17e-960613512345,ksName=system_traces,cfName=sessions,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(706172616d6574657273:org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type))),comment=tracing sessions,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UUIDType,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=client, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=command, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=session_id, type=org.apache.cassandra.db.marshal.UUIDType, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=coordinator, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=request, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=started_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=duration, type=org.apache.cassandra.db.marshal.Int32Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=parameters, type=org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false], events=org.apache.cassandra.config.CFMetaData@385c6d59[cfId=8826e8e9-e16a-3728-8753-3bc1fc713c25,ksName=system_traces,cfName=events,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.TimeUUIDType,org.apache.cassandra.db.marshal.UTF8Type),comment=tracing events,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UUIDType,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=activity, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=thread, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=session_id, type=org.apache.cassandra.db.marshal.UUIDType, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=event_id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=source, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=source_elapsed, type=org.apache.cassandra.db.marshal.Int32Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]}, durableWrites=true, userTypes=org.apache.cassandra.config.UTMetaData@2d70e448}
INFO  13:10:18 Writing Memtable-schema_keyspaces@1730498753(0.261KiB serialized bytes, 7 ops, 0%/0% of on/off-heap limit)
INFO  13:10:18 Writing Memtable-schema_columnfamilies@1114064844(31.533KiB serialized bytes, 507 ops, 0%/0% of on/off-heap limit)
INFO  13:10:18 Writing Memtable-schema_columns@36217111(53.858KiB serialized bytes, 1065 ops, 0%/0% of on/off-heap limit)
INFO  13:10:18 Writing Memtable-schema_triggers@462323136(0.008KiB serialized bytes, 1 ops, 0%/0% of on/off-heap limit)
INFO  13:10:18 Writing Memtable-schema_usertypes@688388391(0.008KiB serialized bytes, 1 ops, 0%/0% of on/off-heap limit)
INFO  13:10:18 Writing Memtable-schema_functions@93851770(0.008KiB serialized bytes, 1 ops, 0%/0% of on/off-heap limit)
INFO  13:10:18 Writing Memtable-schema_aggregates@1817313611(0.008KiB serialized bytes, 1 ops, 0%/0% of on/off-heap limit)
INFO  13:10:18 Loading org.apache.cassandra.config.CFMetaData@a883085[cfId=c5e99f16-8677-3914-b17e-960613512345,ksName=system_traces,cfName=sessions,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(706172616d6574657273:org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type))),comment=tracing sessions,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UUIDType,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=client, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=command, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=session_id, type=org.apache.cassandra.db.marshal.UUIDType, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=coordinator, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=request, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=started_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=duration, type=org.apache.cassandra.db.marshal.Int32Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=parameters, type=org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:18 Initializing system_traces.sessions
INFO  13:10:18 Loading org.apache.cassandra.config.CFMetaData@6d830a67[cfId=8826e8e9-e16a-3728-8753-3bc1fc713c25,ksName=system_traces,cfName=events,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.TimeUUIDType,org.apache.cassandra.db.marshal.UTF8Type),comment=tracing events,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UUIDType,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=activity, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=session_id, type=org.apache.cassandra.db.marshal.UUIDType, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=thread, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=event_id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=source, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=source_elapsed, type=org.apache.cassandra.db.marshal.Int32Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:18 Initializing system_traces.events
INFO  13:10:19 Create new Keyspace: KSMetaData{name=system_distributed, strategyClass=SimpleStrategy, strategyOptions={replication_factor=3}, cfMetaData={parent_repair_history=org.apache.cassandra.config.CFMetaData@5cb7be55[cfId=deabd734-b99d-3b9c-92e5-fd92eb5abf14,ksName=system_distributed,cfName=parent_repair_history,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(7265717565737465645f72616e676573:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type),7375636365737366756c5f72616e676573:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type),636f6c756d6e66616d696c795f6e616d6573:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type))),comment=Repair history,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.TimeUUIDType,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=requested_ranges, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=exception_message, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=keyspace_name, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=successful_ranges, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=started_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=finished_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=exception_stacktrace, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=columnfamily_names, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=parent_id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false], repair_history=org.apache.cassandra.config.CFMetaData@4b9e021f[cfId=759fffad-624b-3181-80ee-fa9a52d1f627,ksName=system_distributed,cfName=repair_history,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.TimeUUIDType,org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(7061727469636970616e7473:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.InetAddressType))),comment=Repair history,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type),minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=status, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=coordinator, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=finished_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=participants, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.InetAddressType), kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=exception_stacktrace, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=parent_id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=range_end, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=range_begin, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=exception_message, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=keyspace_name, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=started_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=columnfamily_name, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=1, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]}, durableWrites=true, userTypes=org.apache.cassandra.config.UTMetaData@467b6850}
INFO  13:10:19 Writing Memtable-schema_keyspaces@1850671951(0.143KiB serialized bytes, 3 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Writing Memtable-schema_columnfamilies@405770394(3.464KiB serialized bytes, 46 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Writing Memtable-schema_columns@1479973311(8.548KiB serialized bytes, 154 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Loading org.apache.cassandra.config.CFMetaData@60869928[cfId=deabd734-b99d-3b9c-92e5-fd92eb5abf14,ksName=system_distributed,cfName=parent_repair_history,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(7265717565737465645f72616e676573:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type),7375636365737366756c5f72616e676573:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type),636f6c756d6e66616d696c795f6e616d6573:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type))),comment=Repair history,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.TimeUUIDType,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=requested_ranges, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=exception_message, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=keyspace_name, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=successful_ranges, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=started_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=finished_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=exception_stacktrace, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=columnfamily_names, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=parent_id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:19 Initializing system_distributed.parent_repair_history
INFO  13:10:19 Loading org.apache.cassandra.config.CFMetaData@323fa569[cfId=759fffad-624b-3181-80ee-fa9a52d1f627,ksName=system_distributed,cfName=repair_history,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.TimeUUIDType,org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(7061727469636970616e7473:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.InetAddressType))),comment=Repair history,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=0,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type),minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=status, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=coordinator, type=org.apache.cassandra.db.marshal.InetAddressType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=finished_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=participants, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.InetAddressType), kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=exception_stacktrace, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=parent_id, type=org.apache.cassandra.db.marshal.TimeUUIDType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=range_end, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=range_begin, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=exception_message, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=keyspace_name, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=started_at, type=org.apache.cassandra.db.marshal.TimestampType, kind=REGULAR, componentIndex=1, indexName=null, indexType=null}, ColumnDefinition{name=columnfamily_name, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=1, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:19 Initializing system_distributed.repair_history
INFO  13:10:19 Writing Memtable-local@1820980522(0.081KiB serialized bytes, 8 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Writing Memtable-local@1300886093(8.380KiB serialized bytes, 259 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Create new Keyspace: KSMetaData{name=system_auth, strategyClass=SimpleStrategy, strategyOptions={replication_factor=1}, cfMetaData={role_permissions=org.apache.cassandra.config.CFMetaData@2da8e456[cfId=3afbe79f-2194-31a7-add7-f5ab90d8ec9c,ksName=system_auth,cfName=role_permissions,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(7065726d697373696f6e73:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type))),comment=permissions granted to db roles,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=resource, type=org.apache.cassandra.db.marshal.UTF8Type, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=permissions, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=1, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false], roles=org.apache.cassandra.config.CFMetaData@7fd294cb[cfId=5bc52802-de25-35ed-aeab-188eecebb090,ksName=system_auth,cfName=roles,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(6d656d6265725f6f66:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type))),comment=role definitions,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=member_of, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=salted_hash, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=can_login, type=org.apache.cassandra.db.marshal.BooleanType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=is_superuser, type=org.apache.cassandra.db.marshal.BooleanType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false], resource_role_permissons_index=org.apache.cassandra.config.CFMetaData@71c8e59a[cfId=5f2fbdad-91f1-3946-bd25-d5da3a5c35ec,ksName=system_auth,cfName=resource_role_permissons_index,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type),comment=index of db roles with permissions granted on a resource,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=resource, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false], role_members=org.apache.cassandra.config.CFMetaData@46408804[cfId=0ecdaa87-f8fb-3e60-88d1-74fb36fe5c0d,ksName=system_auth,cfName=role_members,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type),comment=role memberships lookup table,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=member, type=org.apache.cassandra.db.marshal.UTF8Type, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]}, durableWrites=true, userTypes=org.apache.cassandra.config.UTMetaData@11c2113f}
INFO  13:10:19 Writing Memtable-schema_keyspaces@873579796(0.143KiB serialized bytes, 3 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Writing Memtable-schema_columnfamilies@77400274(5.873KiB serialized bytes, 92 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Writing Memtable-schema_columns@535165102(3.936KiB serialized bytes, 84 ops, 0%/0% of on/off-heap limit)
INFO  13:10:19 Loading org.apache.cassandra.config.CFMetaData@2d39cd1[cfId=3afbe79f-2194-31a7-add7-f5ab90d8ec9c,ksName=system_auth,cfName=role_permissions,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(7065726d697373696f6e73:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type))),comment=permissions granted to db roles,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=resource, type=org.apache.cassandra.db.marshal.UTF8Type, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=permissions, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=1, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:19 Initializing system_auth.role_permissions
INFO  13:10:19 Loading org.apache.cassandra.config.CFMetaData@7c4ca95e[cfId=5f2fbdad-91f1-3946-bd25-d5da3a5c35ec,ksName=system_auth,cfName=resource_role_permissons_index,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type),comment=index of db roles with permissions granted on a resource,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=resource, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:19 Initializing system_auth.resource_role_permissons_index
INFO  13:10:19 Loading org.apache.cassandra.config.CFMetaData@5b017be3[cfId=5bc52802-de25-35ed-aeab-188eecebb090,ksName=system_auth,cfName=roles,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.ColumnToCollectionType(6d656d6265725f6f66:org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type))),comment=role definitions,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=member_of, type=org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type), kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=salted_hash, type=org.apache.cassandra.db.marshal.UTF8Type, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=can_login, type=org.apache.cassandra.db.marshal.BooleanType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}, ColumnDefinition{name=is_superuser, type=org.apache.cassandra.db.marshal.BooleanType, kind=REGULAR, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:19 Initializing system_auth.roles
INFO  13:10:19 Loading org.apache.cassandra.config.CFMetaData@4aa13f0a[cfId=0ecdaa87-f8fb-3e60-88d1-74fb36fe5c0d,ksName=system_auth,cfName=role_members,cfType=Standard,comparator=org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type),comment=role memberships lookup table,readRepairChance=0.0,dcLocalReadRepairChance=0.0,gcGraceSeconds=7776000,defaultValidator=org.apache.cassandra.db.marshal.BytesType,keyValidator=org.apache.cassandra.db.marshal.UTF8Type,minCompactionThreshold=4,maxCompactionThreshold=32,columnMetadata=[ColumnDefinition{name=role, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=null, indexName=null, indexType=null}, ColumnDefinition{name=member, type=org.apache.cassandra.db.marshal.UTF8Type, kind=CLUSTERING_COLUMN, componentIndex=0, indexName=null, indexType=null}],compactionStrategyClass=class org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy,compactionStrategyOptions={},compressionParameters={sstable_compression=org.apache.cassandra.io.compress.LZ4Compressor},bloomFilterFpChance=0.01,memtableFlushPeriod=3600000,caching={"keys":"ALL", "rows_per_partition":"NONE"},defaultTimeToLive=0,minIndexInterval=128,maxIndexInterval=2048,speculativeRetry=99.0PERCENTILE,droppedColumns={},triggers=[],isDense=false]
INFO  13:10:19 Initializing system_auth.role_members

3）執行 ./cqlsh localhost命令驗證是否安裝成功：

➜  bin ./cqlsh localhost
Connected to Test Cluster at localhost:9042.
[cqlsh 5.0.1 | Cassandra 2.2.8 | CQL spec 3.3.1 | Native protocol v4]
Use HELP for help.
cqlsh> SELECT cluster_name, listen_address FROM system.local;

 cluster_name | listen_address
--------------+----------------
 Test Cluster |      127.0.0.1

(1 rows)
cqlsh>

四、Java API

1) 創建 keyspace

CREATE KEYSPACE demodb WITH REPLICATION = {'class' : 'SimpleStrategy','replication_factor': 3};

2) 創建 table

CREATE TABLE users (
  user_name varchar,
  password varchar,
  gender varchar,
  PRIMARY KEY (user_name));

利用下面地址查看cassandra實際存儲模型：http://www.sestevez.com/sestevez/CassandraDataModeler/

3) 插入數據

INSERT INTO users (user_name, password, gender) VALUES ('zhengyong', '1234', 'male');

4) Java查詢

參考：https://github.com/datastax/java-driver

手冊：http://docs.datastax.com/en/developer/java-driver/3.1/manual/

maven依賴

<dependency>
    <groupId>com.datastax.cassandra</groupId>
    <artifactId>cassandra-driver-core</artifactId>
    <version>3.1.0</version>
</dependency>
<dependency>
    <groupId>net.jpountz.lz4</groupId>
    <artifactId>lz4</artifactId>
    <version>1.2.0</version>
</dependency>

cassandra客戶端package cassandra;

package cassandra;

import com.datastax.driver.core.BoundStatement;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.HostDistance;
import com.datastax.driver.core.PoolingOptions;
import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.ProtocolOptions;
import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.SocketOptions;
import com.datastax.driver.core.policies.DCAwareRoundRobinPolicy;
import com.datastax.driver.core.policies.DefaultRetryPolicy;
import com.google.common.base.Preconditions;

import java.util.List;

/**
 * cassandra客戶端<br/>
 * <p>
 * http://docs.datastax.com/en/developer/java-driver/3.1/manual/
 * </p>
 * Created by zhengyong on 16/12/12.
 */
public class CassandraClient {

    /**
     * cluster
     */
    private static Cluster cluster;

    /**
     * session
     */
    private static Session session;

    /**
     * table name
     */
    private String         keyspace;

    /**
     * server ip
     */
    private String         serverIp;

    public CassandraClient(){
    }

    public CassandraClient(String keyspace, String serverIp){
        this.keyspace = keyspace;
        this.serverIp = serverIp;
        createClient();
    }

    /**
     * 創建cassandra客戶端
     */
    public void createClient() {

        Preconditions.checkNotNull(keyspace, "keyspace must not be null.");
        Preconditions.checkNotNull(serverIp, "serverIp must not be null.");

        Cluster.Builder builder = Cluster.builder().addContactPoint(serverIp);

        // 設置連接池
        PoolingOptions poolingOptions = getPoolingOptions();
        builder.withPoolingOptions(poolingOptions);

        // socket 鏈接配置
        SocketOptions socketOptions = new SocketOptions().setKeepAlive(true).setReceiveBufferSize(1024
                                                                                                  * 1024).setSendBufferSize(1024
                                                                                                                            * 1024).setConnectTimeoutMillis(5
                                                                                                                                                            * 1000).setReadTimeoutMillis(1000);
        builder.withSocketOptions(socketOptions);

        // 設置壓縮方式
        builder.withCompression(ProtocolOptions.Compression.LZ4);

        // 負載策略
        DCAwareRoundRobinPolicy dCAwareRoundRobinPolicy = DCAwareRoundRobinPolicy.builder().withLocalDc("myLocalDC").withUsedHostsPerRemoteDc(2).allowRemoteDCsForLocalConsistencyLevel().build();
        builder.withLoadBalancingPolicy(dCAwareRoundRobinPolicy);

        // 重試策略
        builder.withRetryPolicy(DefaultRetryPolicy.INSTANCE);

        cluster = builder.build();
        session = cluster.connect(keyspace); // (2)

        Preconditions.checkNotNull(session, "session must not be null.");
    }

    /**
     * 構建連接池
     *
     * @return 連接池
     */
    private PoolingOptions getPoolingOptions() {
        PoolingOptions poolingOptions = new PoolingOptions().setCoreConnectionsPerHost(HostDistance.LOCAL,
                                                                                       4).setMaxConnectionsPerHost(HostDistance.LOCAL,
                                                                                                                   10).setCoreConnectionsPerHost(HostDistance.REMOTE,
                                                                                                                                                 2).setMaxConnectionsPerHost(HostDistance.REMOTE,
                                                                                                                                                                             20);
        return poolingOptions;
    }

    /**
     * 執行預處理sql
     *
     * @param sql 數據庫語句
     * @param params 佔位符值
     * @return 執行結果
     */
    public ResultSet executePreparedSQL(String sql, List<String> params) {

        Preconditions.checkNotNull(session, "session must not be null.");
        Preconditions.checkNotNull(sql, "sql must not be null.");
        Preconditions.checkNotNull(params, "params must not be null.");

        PreparedStatement prepared = session.prepare(sql);
        BoundStatement bound = prepared.bind(params.toArray());
        return session.execute(bound);
    }

    /**
     * 執行sql語句
     *
     * @param sql 數據庫語句
     * @return 執行結果
     */
    public ResultSet executeSQL(String sql) {

        Preconditions.checkNotNull(session, "session must not be null.");
        Preconditions.checkNotNull(sql, "sql must not be null.");

        return session.execute(sql);
    }

    public void close() {

        if (session != null) {
            session.close();
        }

        if (null != cluster) {
            cluster.close();
        }

    }

    public String getKeyspace() {
        return keyspace;
    }

    public void setKeyspace(String keyspace) {
        this.keyspace = keyspace;
    }

    public String getServerIp() {
        return serverIp;
    }

    public void setServerIp(String serverIp) {
        this.serverIp = serverIp;
    }
}

運行main函數：

package cassandra;

import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Row;
import com.google.common.collect.Lists;

import java.util.List;

/**
 * Created by zhengyong on 16/12/12.
 */
public class CassandraTest {

    public static void main(String[] args) {

        // 創建客戶端
        CassandraClient cassandraClient = new CassandraClient("demodb", "127.0.0.1");

        // 插入數據
        cassandraClient.executeSQL("INSERT INTO users (user_name, password, gender) VALUES ('zhangsan', 'admin', 'male')");

        List<String> params = Lists.newArrayList("root", "root", "male");
        cassandraClient.executePreparedSQL("INSERT INTO users (user_name, password, gender) VALUES (?, ?, ?)", params);

        // 查詢數據
        ResultSet rs = cassandraClient.executeSQL("select * from users where user_name = 'root'");

        // 輸出
        Row row = rs.one();
        System.out.println("row=" + row.toString());
        System.out.println("user_name=" + row.getString("user_name"));
        System.out.println("password=" + row.getString("password"));
        System.out.println("gender=" + row.getString("gender"));

        // 關閉
        cassandraClient.close();
    }
}

運行結果：

2016-12-12 23:43:21,812 - com.datastax.driver.core.ClockFactory -0    [main] INFO   - Using native clock to generate timestamps.
2016-12-12 23:43:22,212 - com.datastax.driver.core.NettyUtil -400  [main] INFO   - Did not find Netty's native epoll transport in the classpath, defaulting to NIO.
2016-12-12 23:43:23,678 - com.datastax.driver.core.policies.DCAwareRoundRobinPolicy -1866 [main] INFO   - Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
2016-12-12 23:43:23,683 - com.datastax.driver.core.Cluster -1871 [main] INFO   - New Cassandra host /127.0.0.1:9042 added
row=Row[root, root, male]
user_name=root
password=root
gender=male

通過客戶端查看剛剛插入數據：

cqlsh> use demodb;
cqlsh:demodb> select * from users ;

 user_name | gender | password 
-----------+--------+----------
  zhangsan |   male |    admin 
 zhengyong |   male |     1234 
      root |   male |     root 
 zhangsan2 |   male |    admin 
      lisi |   male |    admin 
 zhangsan1 |   male |    admin 

(6 rows)