cassandra比mysql快(其实这是一种错误的理解方式)点击打开链接
但cassandra做group,order by操作时比较麻烦,看文章【cassandra的索引查询和排序】点击打开链接
from cassandra.cluster import Cluster from cassandra.query import tuple_factory from cassandra.policies import DCAwareRoundRobinPolicy from cassandra.policies import DowngradingConsistencyRetryPolicy from cassandra import ConsistencyLevel from cassandra.query import dict_factory import sys clusterList=['cassandra服务器ip','cassandra服务器ip', 'cassandra服务器ip'] '''load_balancing_policy是负载均衡,default_retry_policy是重试策略''' cluster=Cluster(clusterList,load_balancing_policy=DCAwareRoundRobinPolicy(local_dc='DC2'),default_retry_policy=DowngradingConsistencyRetryPolicy()) session=cluster.connect("数据库名") '''cassandra数据的一致性''' session.default_consistency_level = ConsistencyLevel.LOCAL_QUORUM data=session.execute("select * from 表名 where xxx") print datacassandra的数据一致性:
http://blog.csdn.net/u010003835/article/details/53432627
我使用的是LOCAL_QUORUM