我有一张有4500万把钥匙的桌子。 压实策略是LCS。 单节点Cassandra版本2.0.5。 没有密钥或行缓存。
查询非常慢。当数据库较小时，它们的速度提高了几倍。
activity | timestamp | source | source_elapsed
-----------------------------------------------------------------------------------------------+--------------+-------------+----------------
execute_cql3_query | 17:47:07,891 | 10.72.9.151 | 0
Parsing select * from object_version_info where key = 'test10-Client9_99900' LIMIT 10000; | 17:47:07,891 | 10.72.9.151 | 80
Preparing statement | 17:47:07,891 | 10.72.9.151 | 178
Executing single-partition query on object_version_info | 17:47:07,893 | 10.72.9.151 | 2513
Acquiring sstable references | 17:47:07,893 | 10.72.9.151 | 2539
Merging memtable tombstones | 17:47:07,893 | 10.72.9.151 | 2597
Bloom filter allows skipping sstable 1517 | 17:47:07,893 | 10.72.9.151 | 2652
Bloom filter allows skipping sstable 1482 | 17:47:07,893 | 10.72.9.151 | 2677
Partition index with 0 entries found for sstable 1268 | 17:47:08,560 | 10.72.9.151 | 669935
Seeking to partition beginning in data file | 17:47:08,560 | 10.72.9.151 | 669956
Skipped 0/3 non-slice-intersecting sstables, included 0 due to tombstones | 17:47:09,411 | 10.72.9.151 | 1520279
Merging data from memtables and 1 sstables | 17:47:09,411 | 10.72.9.151 | 1520302
Read 1 live and 0 tombstoned cells | 17:47:09,411 | 10.72.9.151 | 1520351
Request complete | 17:47:09,411 | 10.72.9.151 | 1520615