for v1.0 or before, please refer to this doc to do manual cleanup: https://kylin.incubator.apache.org/docs/howto/howto_cleanup_storage.html
On 9/30/15, 9:00 AM, "Luke Han" <[email protected]> wrote: >Hi Abhilash, > I would like to recommend to upgrade to v1.0 or v1.1 (is under >releasing >process now). > > Thanks. >Luke > > >Best Regards! >--------------------- > >Luke Han > >On Wed, Sep 30, 2015 at 12:46 AM, Abhilash L L <[email protected]> >wrote: > >> Hello, >> >> We observered that purging and dropping a cube is not deleting >> dictionaries / snapshots and also not dropping the table in hbase. >> >> Also, its leaving a lot of temporary data in hdfs >> >> We are on 0.7.2. I hope it is being fixed shortly and on priority. >> >> I saw that the ticket has been fixed on v1.1 and v2. Can this be >>back >> ported to 0.7.2 >> >> >> Regards, >> Abhilash >> >> On Fri, Sep 18, 2015 at 11:02 AM, yu feng <[email protected]> wrote: >> >> > After build another cube successfully, I recheck this bug and find the >> > reason, thanks to all of you ... >> > >> > 2015-09-11 11:17 GMT+08:00 ShaoFeng Shi <[email protected]>: >> > >> > > If "rowkey_stats" wasn't found, Kylin should throw exception and >>exit, >> > > instead of using 1 region silently; I'm going to change this, please >> let >> > me >> > > know if you don't agree. >> > > >> > > 2015-09-11 10:17 GMT+08:00 Yerui Sun <[email protected]>: >> > > >> > > > Hi, yu feng, >> > > > Let me guess the reason of your problem. >> > > > >> > > > The num of reducers of converting hfile job depends on the >>region >> > > > numbers of corresponding HTable. >> > > > >> > > > For now, all HTables were created with only one region, caused >>by >> the >> > > > wrong path of rowkey_stats. I’ve opened a jira for this issue: >> > > > https://issues.apache.org/jira/browse/KYLIN-968. The patch has >>been >> > > > available last night. >> > > > >> > > > Here’s some clues to confirm my guessing: >> > > > 1. You can find the corresponding HTable name in log, check its >> > > regions, >> > > > it should have only one region. >> > > > 2. Check your kylin working directory on hdfs, there should be a >> path >> > > > like ‘../kylin-null/../rowkey_stats'. >> > > > 3. Grep your kylin.log in tomcat dir, you should find the log >> > contains >> > > > ‘no region split, HTable will be one region’. >> > > > >> > > > If you hit all the three clues, I think KYLIN-968 could resolve >> your >> > > > problem. >> > > > >> > > > >> > > > > 在 2015年9月11日，00:54，yu feng <[email protected]> 写道： >> > > > > >> > > > > OK, I find another problem(I am a problem maker, ^_^), today I >>buid >> > > this >> > > > > cube which has 15 dimensions(one Mandatory dimension, to >>hierarchy >> > > > > dimension and others are normal dimension), I find cuboid files >>are >> > > > 1.9TB, >> > > > > in the step of converting cuboid to hfile it is too slow. I >>check >> the >> > > log >> > > > > of this job and find there are 9000+ mappers and only one >>reducer. >> > > > > >> > > > > I discard this job when our hadoop administrator tells me the >>node >> > > witch >> > > > > run this reducer is out of space of disk. I have to stop it, I >>am >> > doubt >> > > > > that why there are only one reducer(I do not check source code >>of >> > this >> > > > > job), By the way, my original data is only hundreds MB. I think >> this >> > > > would >> > > > > cause more problems if original is bigger or dimension is much >> more.. >> > > > > >> > > > > 2015-09-10 23:46 GMT+08:00 Luke Han <[email protected]>: >> > > > > >> > > > >> The 2.0 will not come recently, there are huge refactor and >>bunch >> of >> > > new >> > > > >> features, we have to make sure there are no critical bugs >>before >> > > > release. >> > > > >> >> > > > >> The same function also available under v1.x branch, please stay >> > tuned >> > > > for >> > > > >> update information for that. >> > > > >> >> > > > >> Thanks. >> > > > >> >> > > > >> >> > > > >> Best Regards! >> > > > >> --------------------- >> > > > >> >> > > > >> Luke Han >> > > > >> >> > > > >> On Thu, Sep 10, 2015 at 7:50 PM, yu feng <[email protected]> >> > > wrote: >> > > > >> >> > > > >>> What good news ! I wish you can release the version as >>quickly >> as >> > > > >>> possible, Today, I build a cube whose cuboid files is 1.9TB. >>If >> we >> > > > merge >> > > > >>> cube based on cuboid files, I think it will be very slowly.. >> > > > >>> >> > > > >>> 2015-09-10 19:34 GMT+08:00 Shi, Shaofeng <[email protected]>: >> > > > >>> >> > > > >>>> We have implemented the merge from HTable directly in Kylin >>2.0, >> > > which >> > > > >>>> hasn’t been released/announced. >> > > > >>>> >> > > > >>>> On 9/10/15, 7:22 PM, "yu feng" <[email protected]> wrote: >> > > > >>>> >> > > > >>>>> I think kylin can finish merging just depend on tables on >> hbase, >> > > This >> > > > >>> will >> > > > >>>>> make merging cubes more quickly, Isn't it ? >> > > > >>>>> >> > > > >>>>> 2015-09-10 19:16 GMT+08:00 yu feng <[email protected]>: >> > > > >>>>> >> > > > >>>>>> After check source code, I find you are right, cuboid files >> will >> > > be >> > > > >>> used >> > > > >>>>>> while merging segments, But a new question comes, Why kylin >> > merge >> > > > >>>>>> segment >> > > > >>>>>> just based on hfile, I can not find how to take hbase >>table as >> > > input >> > > > >>>>>> format >> > > > >>>>>> of mapreduce job, But kylin take HFileOutputFormat as >>output >> > > format >> > > > >>>>>> while >> > > > >>>>>> changing cuboid to hfile. >> > > > >>>>>> >> > > > >>>>>> From this, I find kylin will take more space for a cube >> > actually , >> > > > >> not >> > > > >>>>>> only hfile but also cuboid files, the former are used for >> query >> > > and >> > > > >>> the >> > > > >>>>>> latter are used for merge, and the capacity of cuboid >>files is >> > > > >> bigger >> > > > >>>>>> than >> > > > >>>>>> hfiles. >> > > > >>>>>> >> > > > >>>>>> I think we could do some thing to optimize it... I want to >> know >> > > your >> > > > >>>>>> opinions about it . >> > > > >>>>>> >> > > > >>>>>> 2015-09-10 18:36 GMT+08:00 Yerui Sun <[email protected]>: >> > > > >>>>>> >> > > > >>>>>>> Hi, yu feng, >> > > > >>>>>>> I’ve also noticed these files and opened a jira: >> > > > >>>>>>> https://issues.apache.org/jira/browse/KYLIN-978, and I’ll >> > post a >> > > > >>> patch >> > > > >>>>>>> tonight. >> > > > >>>>>>> >> > > > >>>>>>> Here’s my opinions on your three question, feel free to >> > correct >> > > > >> me: >> > > > >>>>>>> >> > > > >>>>>>> First, the data path of intermediate hive table should be >> > > deleted >> > > > >>>>>>> after >> > > > >>>>>>> building, I agreed with that. >> > > > >>>>>>> >> > > > >>>>>>> Second, the cuboid files will be used for merge and will >>be >> > > > >> deleted >> > > > >>>>>>> when merging job completed, we need and must leave them on >> > hdfs. >> > > > >> The >> > > > >>>>>>> fact_distint_columns should be deleted. In additionally, >>the >> > path >> > > > >> of >> > > > >>>>>>> rowkey_stats and hfile >> > > > >>>>>>> should also be deleted. >> > > > >>>>>>> >> > > > >>>>>>> Third, there’s no garbage collection steps if a job >>discard, >> > > > >> maybe >> > > > >>> we >> > > > >>>>>>> need a patch for this. >> > > > >>>>>>> >> > > > >>>>>>> >> > > > >>>>>>> Short answer: >> > > > >>>>>>> KYLIN-978 will clean all hdfs path except cuboid files >>after >> > > > >>> buildJob >> > > > >>>>>>> and mergeJob completed. >> > > > >>>>>>> The hdfs path will not be cleanup if a job was >>discarded, we >> > > need >> > > > >>>>>>> improvement on this. >> > > > >>>>>>> >> > > > >>>>>>> >> > > > >>>>>>> Best Regards, >> > > > >>>>>>> Yerui Sun >> > > > >>>>>>> [email protected] >> > > > >>>>>>> >> > > > >>>>>>> >> > > > >>>>>>> >> > > > >>>>>>>> 在 2015年9月10日，18:20，yu feng <[email protected]> 写道： >> > > > >>>>>>>> >> > > > >>>>>>>> I see this core Improvement in release 1.0, JIRA url : >> > > > >>>>>>>> https://issues.apache.org/jira/browse/KYLIN-926 >> > > > >>>>>>>> >> > > > >>>>>>>> However, after my test and check the source code , I find >> some >> > > > >>>>>>> rubbish(I am not >> > > > >>>>>>>> sure) file in HDFS. >> > > > >>>>>>>> >> > > > >>>>>>>> First, kylin only drop the Intermediate table in hive, >>but >> the >> > > > >>> table >> > > > >>>>>>> is >> > > > >>>>>>> an >> > > > >>>>>>>> EXTERNAL table, the file still exist in kylin tmp >>directory >> in >> > > > >>> HDFS(I >> > > > >>>>>>> check >> > > > >>>>>>>> that..) >> > > > >>>>>>>> >> > > > >>>>>>>> Second, the cuboid files take a large space in HDFS, and >> kylin >> > > do >> > > > >>> not >> > > > >>>>>>>> delete after the cube build(fact_distinct_columns files >> exist >> > > > >> too). >> > > > >>>>>>> I am >> > > > >>>>>>>> not sure if those has other effects, remind me please if >>it >> > > has.. >> > > > >>>>>>>> >> > > > >>>>>>>> Third, After I discard a job, I think kylin should delete >> the >> > > > >>>>>>> Intermediate >> > > > >>>>>>>> files and drop Intermediate hive table, even though >>delete >> > > > >>>>>>>> them asynchronous. I think those data do not have any >> > > > >>>>>>> effects..remind me >> > > > >>>>>>>> please if it has.. >> > > > >>>>>>>> >> > > > >>>>>>>> These are rubbish datas still exist in current >> > > > >> version(kylin-1.0), >> > > > >>>>>>> please >> > > > >>>>>>>> check, thanks.. >> > > > >>>>>>> >> > > > >>>>>>> >> > > > >>>>>> >> > > > >>>> >> > > > >>>> >> > > > >>> >> > > > >> >> > > > >> > > > >> > > >> > >>
