Are minor compaction and major compaction different in HBase 0.92?

Hello, My HBase version is 0.92.0. And I find that when I use minor compaction and major compaction to compact a table, there are no differences. In the minor compaction, it will remove the deleted cells and discard the exceeding data versions which should be the task of major compaction. I wonder

Re: HBase, CDH3U2, EC2

We use ec2 and cdh as well and have around 80 Hadoop/hbase nodes deployed across a few different clusters. We use a combination of puppet for package management and fabric scripts for pushing configs and managing services. Our base AMI is a pretty bare centos6 install and puppet handles most of

Re: Regions not cleared

Hi, as far as I know TTL as well as deletions just take effect on major compaction. (see http://hbase.apache.org/book.html#regions.arch -> 8.7.5.5) regards Christian Von: ajay.bhosle An: user@hbase.apache.org Gesendet: 14:33 Mittwoch, 25.April 2012 Betreff: Regions not cleared

Re: TIMERANGE performance on uniformly distributed keyspace

Hi, 2012-04-14 klockan 21:07 skrev Rob Verkuylen: > As far as I understand sequential keys with a timerange scan have the best > read performance possible, because of the HFile metadata, just as N > indicates. Maybe adding Bloomfilters can further up the performance. As far I understand it, Bloom

Re: 0.20 to 0.90 upgrade

On Wed, Apr 25, 2012 at 11:14 AM, David Charle wrote: > As per the docs, it looks like painless to upgrade from 0.20.3 to 0.90 > (only need to run upgrade script if upgrading to 0.92). > http://hbase.apache.org/book/upgrading.html#upgrade0.90 > > Anyone has experience in upgrading from 0.20 to 0.9

Re: hbase installation

check out this too seems to make it work, do what tariq has suggested too http://ria101.wordpress.com/2010/01/28/setup-hbase-in-pseudo-distributed-mode-and-connect-java-client/ On Thu, Apr 26, 2012 at 1:05 AM, Mohammad Tariq wrote: > Change 127.0.1.1 in your /etc/hosts file to 127.0.0.1...als

Re: hbase installation

Change 127.0.1.1 in your /etc/hosts file to 127.0.0.1...also add the hadoop-core.jar from hadoop folder and commons-configuration.jar from the hadoob/lib to the hbae/lib folder. On Apr 25, 2012 11:59 PM, "shashwat shriparv" wrote: > just foll this > > http://hbase.apache.org/book/standalone_dist.

Re: hbase installation

just foll this http://hbase.apache.org/book/standalone_dist.html On Wed, Apr 25, 2012 at 7:05 PM, Nitin Pawar wrote: > any error msg? > > On Wed, Apr 25, 2012 at 7:02 PM, shehreen >wrote: > > > > > Hi > > > > am new to hbase and hadoop. I want to install hbase and to work with > hbase > > writi

0.20 to 0.90 upgrade

As per the docs, it looks like painless to upgrade from 0.20.3 to 0.90 (only need to run upgrade script if upgrading to 0.92). http://hbase.apache.org/book/upgrading.html#upgrade0.90 Anyone has experience in upgrading from 0.20 to 0.90 or something similar with major upgrade ? Do we need to upgrad

Re: Problem to Insert the row that i was deleted

Thanks yonghu. That is HBASE-4241. One small point: The deleted rows are not deleted from the memstore, but rather not included when the memstore is flushed to disk. -- Lars - Original Message - From: yonghu To: user@hbase.apache.org; lars hofhansl Cc: Sent: Wednesday, April 25,

Re: Integrity constraints

Thank you Gary..! Now i understood the actual method. On Wed, Apr 25, 2012 at 11:36 AM, Gary Helmling wrote: > Hi Vamshi, > > See the ConstraintProcessor coprocessor that was added for just this > kind of case: > http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/constraint/package-summary.

Re: Hbase Quality Of Service: large standarad deviation in insert time while inserting same type of rows in Hbase

Hi there- In addition to what was said about GC, you might want to double-check this... http://hbase.apache.org/book.html#performance ... as well as this case-study for performance troubleshooting http://hbase.apache.org/book.html#casestudies.perftroub On 4/24/12 9:58 PM, "Michael Segel"

Re: hbase installation

any error msg? On Wed, Apr 25, 2012 at 7:02 PM, shehreen wrote: > > Hi > > am new to hbase and hadoop. I want to install hbase and to work with hbase > writing mapreduce jobs for data in hbase. I installed hbase. It works well > in standalone mode but dont start master and zookeeper properly on >

hbase installation

Hi am new to hbase and hadoop. I want to install hbase and to work with hbase writing mapreduce jobs for data in hbase. I installed hbase. It works well in standalone mode but dont start master and zookeeper properly on pseudodistributed mode. kindly help to resolve this problem. Thanks --

Regions not cleared

Hi, I have set TTL in hbase table due to which the data is cleared after specified time, but the regions are not cleared even as the data inside the regions are cleared. Can someone please let me know if I am missing anything. Thanks Ajay

Re: Problem to Insert the row that i was deleted

Uhm... Not exactly Lars... Just my $0.02 ... While I don't disagree w Lars, I think the question you have to ask is why is the time stamp important? Is it an element of the data or is it an artifact? This kind of gets in to your Schema design and taking short cuts. You may want to instead create

Re: Hbase Quality Of Service: large standarad deviation in insert time while inserting same type of rows in Hbase

I guess Sesame Street isn't global... ;-) oh and of course I f'd the joke by saying Grover and not Oscar so it's my bad. :-(. [Google Oscar the groutch, and you'll understand the joke that I botched] Its most likely GC and a mis tuned cluster. The OP doesn't really get in to detail, except to sa

Re: Problem to Insert the row that i was deleted

As Lars mentioned, the row is not physically deleted. The way which Hbase uses is to insert a cell called "tombstone" which is used to mask the deleted value, but value is still there (if the deleted value is in the same memstore with tombstone, it will be deleted in the memstore, so you will not f