the logger like this :
INFO [CompactionExecutor:501] 2015-06-21 21:42:36,306 CompactionTask.java:140 - Compacting [SSTableReader(path='/home/ant/apache-cassandra-2.1.6/bin/../data/data/system/hints/system-hints-ka-365-Data.db')] INFO [CompactionExecutor:501] 2015-06-21 21:42:37,782 CompactionTask.java:270 - Compacted 1 sstables to [bin/../data/data/system/hints/system-hints-ka-366,]. 18,710,207 bytes to 18,710,207 (~100% of original) in 1,476ms = 12.089054MB/s. 11 total partitions merged to 11. Partition merge counts were {1:11, } INFO [CompactionExecutor:502] 2015-06-21 21:52:37,784 CompactionTask.java:140 - Compacting [SSTableReader(path='/home/ant/apache-cassandra-2.1.6/bin/../data/data/system/hints/system-hints-ka-366-Data.db')] INFO [CompactionExecutor:502] 2015-06-21 21:52:39,223 CompactionTask.java:270 - Compacted 1 sstables to [bin/../data/data/system/hints/system-hints-ka-367,]. 18,710,207 bytes to 18,710,207 (~100% of original) in 1,438ms = 12.408515MB/s. 11 total partitions merged to 11. Partition merge counts were {1:11, } INFO [CompactionExecutor:503] 2015-06-21 22:02:39,224 CompactionTask.java:140 - Compacting [SSTableReader(path='/home/ant/apache-cassandra-2.1.6/bin/../data/data/system/hints /system-hints-ka-367-Data.db')] INFO [CompactionExecutor:503] 2015-06-21 22:02:40,742 CompactionTask.java:270 - Compacted 1 sstables to [bin/../data/data/system/hints/system-hints-ka-368,]. 18,710,207 byte s to 18,710,207 (~100% of original) in 1,517ms = 11.762323MB/s. 11 total partitions merged to 11. Partition merge counts were {1:11, } INFO [CompactionExecutor:504] 2015-06-21 22:12:40,743 CompactionTask.java:140 - Compacting [SSTableReader(path='/home/ant/apache-cassandra-2.1.6/bin/../data/data/system/hints /system-hints-ka-368-Data.db')] INFO [CompactionExecutor:504] 2015-06-21 22:12:42,262 CompactionTask.java:270 - Compacted 1 sstables to [bin/../data/data/system/hints/system-hints-ka-369,]. 18,710,207 byte s to 18,710,207 (~100% of original) in 1,518ms = 11.754574MB/s. 11 total partitions merged to 11. Partition merge counts were {1:11, } INFO [CompactionExecutor:505] 2015-06-21 22:22:42,264 CompactionTask.java:140 - Compacting [SSTableReader(path='/home/ant/apache-cassandra-2.1.6/bin/../data/data/system/hints /system-hints-ka-369-Data.db')] INFO [CompactionExecutor:505] 2015-06-21 22:22:43,750 CompactionTask.java:270 - Compacted 1 sstables to [bin/../data/data/system/hints/system-hints-ka-370,]. 18,710,207 byte s to 18,710,207 (~100% of original) in 1,486ms = 12.007701MB/s. 11 total partitions merged to 11. Partition merge counts were {1:11, } C* 2.1.6 -------------------------------------- Ranger Tsao