>now have 731 regions (each about ~350 mb !!). I checked the configuration in CM, and the value for hbase.hregion.max.filesize is 1 GB too !!!
You mentioned the splits at the time of table creation? How u created the table? -Anoop- On Mon, May 13, 2013 at 5:18 PM, Praveen Bysani <[email protected]>wrote: > Hi, > > Thanks for the details. No i haven't run any compaction or i have no idea > if there is one going on in background. I executed a major_compact on that > table and i now have 731 regions (each about ~350 mb !!). I checked the > configuration in CM, and the value for hbase.hregion.max.filesize is 1 GB > too !!! > > I am not trying to access HFiles in my MR job, infact i am just using a PIG > script which handles this. This number (731) is close to my number of map > tasks, which makes sense. But how can i decrease this, shouldn't the size > of each region be 1 GB with that configuration value ? > > > On 13 May 2013 18:36, Ted Yu <[email protected]> wrote: > > > You can change HFile size through hbase.hregion.max.filesize parameter. > > > > On May 13, 2013, at 2:45 AM, Praveen Bysani <[email protected]> > > wrote: > > > > > Hi, > > > > > > I wanted to minimize on the number of map reduce tasks generated while > > > processing a job, hence configured it to a larger value. > > > > > > I don't think i have configured HFile size in the cluster. I use > Cloudera > > > Manager to mange my cluster, and the only configuration i can relate > > > to is hfile.block.cache.size > > > which is set to 0.25. How do i change the HFile size ? > > > > > > On 13 May 2013 15:03, Amandeep Khurana <[email protected]> wrote: > > > > > >> On Sun, May 12, 2013 at 11:40 PM, Praveen Bysani < > > [email protected] > > >>> wrote: > > >> > > >>> Hi, > > >>> > > >>> I have the dfs.block.size value set to 1 GB in my cluster > > configuration. > > >> > > >> > > >> Just out of curiosity - why do you have it set at 1GB? > > >> > > >> > > >>> I > > >>> have around 250 GB of data stored in hbase over this cluster. But > when > > i > > >>> check the number of blocks, it doesn't correspond to the block size > > >> value i > > >>> set. From what i understand i should only have ~250 blocks. But > instead > > >>> when i did a fsck on the /hbase/<table-name>, i got the following > > >>> > > >>> Status: HEALTHY > > >>> Total size: 265727504820 B > > >>> Total dirs: 1682 > > >>> Total files: 1459 > > >>> Total blocks (validated): 1459 (avg. block size 182129886 B) > > >>> Minimally replicated blocks: 1459 (100.0 %) > > >>> Over-replicated blocks: 0 (0.0 %) > > >>> Under-replicated blocks: 0 (0.0 %) > > >>> Mis-replicated blocks: 0 (0.0 %) > > >>> Default replication factor: 3 > > >>> Average block replication: 3.0 > > >>> Corrupt blocks: 0 > > >>> Missing replicas: 0 (0.0 %) > > >>> Number of data-nodes: 5 > > >>> Number of racks: 1 > > >>> > > >>> Are there any other configuration parameters that need to be set ? > > >> > > >> > > >> What is your HFile size set to? The HFiles that get persisted would be > > >> bound by that number. Thereafter each HFile would be split into > blocks, > > the > > >> size of which you configure using the dfs.block.size configuration > > >> parameter. > > >> > > >> > > >>> > > >>> -- > > >>> Regards, > > >>> Praveen Bysani > > >>> http://www.praveenbysani.com > > > > > > > > > > > > -- > > > Regards, > > > Praveen Bysani > > > http://www.praveenbysani.com > > > > > > -- > Regards, > Praveen Bysani > http://www.praveenbysani.com >
