bq. I have configured Hbase in pseudo distributed mode on top of HDFS. What was the reason for using pseudo distributed mode in production setup ?
Cheers On Mon, Jul 1, 2013 at 1:44 AM, Vimal Jain <[email protected]> wrote: > Thanks Dhaval/Michael/Ted/Otis for your replies. > Actually , i asked this question because i am seeing some performance > degradation in my production Hbase setup. > I have configured Hbase in pseudo distributed mode on top of HDFS. > I have created 17 Column families :( . I am actually using 14 out of these > 17 column families. > Each column family has around on average 8-10 column qualifiers so total > around 140 columns are there for each row key. > I have around 1.6 millions rows in the table. > To completely scan the table for all 140 columns , it takes around 30-40 > minutes. > Is it normal or Should i redesign my table schema ( probably merging 4-5 > column families into one , so that at the end i have just 3-4 cf ) ? > > > > On Sat, Jun 29, 2013 at 12:06 AM, Otis Gospodnetic < > [email protected]> wrote: > > > Hm, works for me - > > > > > http://search-hadoop.com/m/qOx8l15Z1q42/column+families+fb&subj=Re+HBase+Column+Family+Limit+Reasoning > > > > Shorter version: http://search-hadoop.com/m/qOx8l15Z1q42 > > > > Otis > > -- > > Solr & ElasticSearch Support -- http://sematext.com/ > > Performance Monitoring -- http://sematext.com/spm > > > > > > > > On Fri, Jun 28, 2013 at 8:40 AM, Vimal Jain <[email protected]> wrote: > > > Hi All , > > > Thanks for your replies. > > > > > > Ted, > > > Thanks for the link, but its not working . :( > > > > > > > > > On Fri, Jun 28, 2013 at 5:57 PM, Ted Yu <[email protected]> wrote: > > > > > >> Vimal: > > >> Please also refer to: > > >> > > >> > > > http://search-hadoop.com/m/qOx8l15Z1q42/column+families+fb&subj=Re+HBase+Column+Family+Limit+Reasoning > > >> > > >> On Fri, Jun 28, 2013 at 1:37 PM, Michel Segel < > > [email protected] > > >> >wrote: > > >> > > >> > Short answer... As few as possible. > > >> > > > >> > 14 CF doesn't make too much sense. > > >> > > > >> > Sent from a remote device. Please excuse any typos... > > >> > > > >> > Mike Segel > > >> > > > >> > On Jun 28, 2013, at 12:20 AM, Vimal Jain <[email protected]> wrote: > > >> > > > >> > > Hi, > > >> > > How many column families should be there in an hbase table ? Is > > there > > >> any > > >> > > performance issue in read/write if we have more column families ? > > >> > > I have designed one table with around 14 column families in it > with > > >> each > > >> > > having on average 6 qualifiers. > > >> > > Is it a good design ? > > >> > > > > >> > > -- > > >> > > Thanks and Regards, > > >> > > Vimal Jain > > >> > > > >> > > > > > > > > > > > > -- > > > Thanks and Regards, > > > Vimal Jain > > > > > > -- > Thanks and Regards, > Vimal Jain >
