I found the following log. What does it mean ? INFO [CompactionExecutor:11] 2017-09-01 16:55:47,909 NoSpamLogger.java:91 - Maximum memory usage reached (512.000MiB), cannot allocate chunk of 1.000MiB WARN [RMI TCP Connection(1714)-127.0.0.1] 2017-09-01 17:02:42,516 CompactionManager.java:704 - Schema does not exist for file mc-151276-big-Data.db. Skipping.
> 在 2017年9月1日，下午4:54，Nicolas Guyomar <nicolas.guyo...@gmail.com> 写道： > > You should have a log coming from the CompactionManager (in cassandra > system.log) when you try the command, what does it says ? > > On 1 September 2017 at 10:07, qf zhou <zhouqf2...@gmail.com > <mailto:zhouqf2...@gmail.com>> wrote: > When I run the command, the following occurs and it returns null. > > Is it normal ? > > 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 > > > Welcome to JMX terminal. Type "help" for available commands. > $>run -b org.apache.cassandra.db:type=CompactionManager > forceUserDefinedCompaction mc-100963-big-Data.db > #calling operation forceUserDefinedCompaction of mbean > org.apache.cassandra.db:type=CompactionManager > #operation returns: > null > > > > >> 在 2017年9月1日，下午3:49，Nicolas Guyomar <nicolas.guyo...@gmail.com >> <mailto:nicolas.guyo...@gmail.com>> 写道： >> >> 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 >> <mailto: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 <mailto: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 >> >> <mailto: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 >> >> <mailto:user-unsubscr...@cassandra.apache.org> >> >> For additional commands, e-mail: user-h...@cassandra.apache.org >> >> <mailto:user-h...@cassandra.apache.org> >> >> >> > >> > --------------------------------------------------------------------- >> > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org >> > <mailto:user-unsubscr...@cassandra.apache.org> >> > For additional commands, e-mail: user-h...@cassandra.apache.org >> > <mailto:user-h...@cassandra.apache.org> >> > >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org >> <mailto:user-unsubscr...@cassandra.apache.org> >> For additional commands, e-mail: user-h...@cassandra.apache.org >> <mailto:user-h...@cassandra.apache.org> >> >> > >
