Jarod, Some informations are missing. Is it only 1 table you have? How did you try to count the number of rows the first time? If you are using only 1 client, scanning is sequential so it's normal to have only 1 region server taking all the hits at a time. Maybe try using the RowCounter mapreduce job provided with HBase?
Also, try to upgrade to HBase 0.18.1 because Hadoop 0.18 is a bit faster. J-D On Fri, Nov 7, 2008 at 3:21 AM, Jarod Feng <[EMAIL PROTECTED]> wrote: > > Hi , > I'm using hbase0.2.1 + hadoop 0.17 with 11 client & 1master servers > I crawl some data and save them to hbase with map & reduce. > after that , I try to count the total number of some data. > it too slow , you can see the monitor , 1 of clients have a high request , > but others is 0. > > S1:60020 1226025034218 requests: 0 regions: 5 > S2:60020 1226025034364 requests: 0 regions: 5 > S3:60020 1226025033874 requests: 0 regions: 5 > S4:60020 1226025035074 requests: 5085 regions: 4 > S5:60020 1226025034712 requests: 0 regions: 5 > S6:60020 1226025034716 requests: 0 regions: 5 > S7:60020 1226025034280 requests: 0 regions: 4 > S8:60020 1226025034130 requests: 0 regions: 5 > S9:60020 1226025033726 requests: 0 regions: 5 > S10:60020 1226025034539 requests: 0 regions: 5 > S11:60020 1226025034528 requests: 0 regions: 4 > > I don't know the reason , and when I use shell for count or use single > process without map-reduce , it's faster > > I have use hadoop for many month , but this is my first time to develop > based hbase > > > Thanks, > -- > View this message in context: > http://www.nabble.com/low-performance-on-hadoop-tp20376261p20376261.html > Sent from the HBase User mailing list archive at Nabble.com. > >
