bq. region server crashes after ttl archiver runs This is the first time I hear of such problem. Can you give us more information (stack trace, server log snippet for that period) ?
Thanks On Thu, Sep 20, 2018 at 11:14 PM meirav.malka <meirav.ma...@gmail.com> wrote: > Hi,Since you probably don't have enough space for backup for such a large > table, test it on a small one and rowcount before and after.We work > extensively with mob and there are several issues with it that we had to > work around.1.Mob and ttl - region server crashes after ttl archiver > runs.2.Mob and snapshot - didn't work in cdh 5.7.13.Mob compaction- > currently performed only by the master.if your flushes aren't big enough , > compaction will never end.4.Deletes - major mob compaction is the only one > doing mob delete,it is also done by the master, on the entire data( it is > not scheduled )If you have deletes, the will never actually be deleted. > Regards,Meirav > Sent from my Samsung Galaxy smartphone. > -------- Original message --------From: Jean-Marc Spaggiari < > jean-m...@spaggiari.org> Date: 9/21/18 01:09 (GMT+02:00) To: user < > user@hbase.apache.org> Subject: Re: Can MOB be enabled for existing > table? > Hi Andrea, > > I will say that the easiest way to know is to try it... I'm guessing that > it should work. When HBase will compact the file, it will figure that some > fields are bigger than the configures MOB threshold and will move them > under the MOB umbrella. But this has to be tested. Let us know. > > Thanks, > > JMS > > Le jeu. 20 sept. 2018 à 08:26, Andrea Fonti <andreafont...@gmail.com> a > écrit : > > > Hi, > > > > I’m currently running HBASE on a Cloudera CDH 5.8.4 distribution > > (hbase-1.2.0+cdh5.8.5+263), is it possible to enable MOB for a column of > an > > existing multi terabyte table? > > > > If the answer is affirmative what will hbase do with the existing data? > > Will it rewrite with MOB files the next major compaction? > > > > Thank you > > > > Andrea >
