Hi Daniel, Yes get(row) is more expensive than get(row, column name). Keep in mind that HBase is column oriented. So when you fetch data from multiple columns it means that it will need to access multiple files (1 per column family) in order to get the data for the whole row.
Sebastien On Tue, Jul 15, 2008 at 8:54 AM, Daniel <[EMAIL PROTECTED]> wrote: > hi all, > i'm writting a program to access my hbase table in a MR job. my first > version is to get different values from get(row,column name), > and now im changing to get one row each time into a map, and query that map > instead - for one reduce job. > i think it would be better to access hbase only once per one reduce > function, but it seems like the latter version takes a longer time to > finish > > during the reduce job. does this mean get(row, column name) is less > expensive than get(row) ? > thanks. > > Daniel >
