Hi Jean there is not 1 table , but 1 of them is a huge table.
I use scanner to get all result and use calculate the total hits number. I use hadoop 0.1.7 , hbase 0.18 I have tried , is doesn't work with Hadoop 0.1.7 Jean-Daniel Cryans-2 wrote: > > 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. >> >> > > -- View this message in context: http://www.nabble.com/low-performance-on-hadoop-tp20376261p20413091.html Sent from the HBase User mailing list archive at Nabble.com.
