我有Cassandra db表记录
create table records (
id text,
cachedtime timestamp,
data list<frozen<RecordType>>,
PRIMARY KEY (id, cachedtime)
AND CLUSTERING ORDER BY (cachedtime DESC);
RecordType是UDT，cachedtime是聚类键，每条记录的TTL是60分钟 .
我们正在查询ReadTimeoutException，查询下面的选择查询，其一致性级别为LOCAL_QUORUM，复制因子为2 .
select * from records where id= "11" and cachedTime < now
com.datastax.driver.core.exceptions.ReadTimeoutException: Cassandra
timeout during read query at consistency LOCAL_QUORUM (2 responses were
required but only 1 replica responded)
任何人都可以帮助我为什么我会遇到这个例外 . 请同时根据timstamp建议查询没有下限会导致性能问题吗？
请指教