https://community.cloudera.com/t5/Support-Questions/Does-TTL-in-Hbase-require-Major-Compaction/m-p/214171#M176086 <P>So you said: </P><P>"this is actually a <STRONG>really idea</STRONG> if you've somehow done this, by the way..."</P><P>But I think you left an adjective out. I suppose you mean: <STRONG>bad</STRONG>?</P><P>We have been told by experts at Azure and Hashmap that we don't need to do major compaction and it is currently shut off. </P><P>1. We don't do any deletions from our system. Would this be the reason they say this?</P><P>2. We have been told that major compaction will block any writes to our tables (we can't have this). I was told this is untrue at PhoenixCon but when I asked Hashmap, they said that HDInsight has rewritten major compaction and that it blocks writes.</P><P>2. We want to start using TTL. If minor compaction deletes these records (that is what I took from above) is major compaction required?</P><P>3. Why is there so much confusion about this?! Everyone seems to think TTL requires major compaction.</P> Thu, 22 Jun 2017 19:42:18 GMT juchems_mark_e 2017-06-22T19:42:18Z