Hi, Last time I used forceUserDefinedCompaction, I got myself a headache because I was trying to use a full path like you're doing, but in fact it just need the sstable as parameter
Can you just try : echo "run -b org.apache.cassandra.db:type=CompactionManager forceUserDefinedCompaction mc-100963-big-Data.db" | java -jar /opt/cassandra/tools/jmx/jmxterm-1.0-alpha-4-uber.jar -l localhost:7199 On 1 September 2017 at 08:29, qf zhou <zhouqf2...@gmail.com> wrote: > > dataPath=/hdd3/cassandra/data/gps/gpsfullwithstate- > 073e51a0cdb811e68dce511be6a305f6/mc-100963-big-Data.db > echo "run -b org.apache.cassandra.db:type=CompactionManager > forceUserDefinedCompaction $dataPath" | java -jar > /opt/cassandra/tools/jmx/jmxterm-1.0-alpha-4-uber.jar > -l localhost:7199 > > In the above, I am using a jmx method. But it seems that the file size > doesn’t change. My command is wrong ? > > > 在 2017年9月1日，下午2:17，Jeff Jirsa <jji...@gmail.com> 写道： > > > > User defined compaction to do a single sstable compaction on just that > sstable > > > > It's a nodetool command in very recent versions, or a jmx method in > older versions > > > > > > -- > > Jeff Jirsa > > > > > >> On Aug 31, 2017, at 11:04 PM, qf zhou <zhouqf2...@gmail.com> wrote: > >> > >> I am using a cluster with 3 nodes and the cassandra version is > 3.0.9. I have used it about 6 months. Now each node has about 1.5T data in > the disk. > >> I found some sstables file are over 300G. Using the sstablemetadata > command, I found it: Estimated droppable tombstones: 0.9622972799707109. > >> It is obvious that too much tombstone data exists. > >> The default_time_to_live = 8640000(100 days) and gc_grace_seconds = > 432000(5 days). Using nodetool compactionstats, I found the some > compaction processes exists. > >> So I really want to know how to clear tombstone data ? otherwise the > disk space will cost too much. > >> I really need some help, because some few people know cassandra in my > company. > >> Thank you very much! > >> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > >> For additional commands, e-mail: user-h...@cassandra.apache.org > >> > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > > For additional commands, e-mail: user-h...@cassandra.apache.org > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > >
