Hi all,i am wondering whether someone could explain this to me, although i have 
read some materials for hbase, but still have some puzzles on this.
Hbase store files are stored on hdfs, which lacks random access & writes, 
although hbase has some mechanisms to filter data on store files level, but 
still has to search wanted column data based on the left store files. when get 
to this granularity, how can it quick position the columns, indexing through 
the files which means having to read the whole data block on hdfs, and leverage 
the refined keyvalue format to indexing data? isn't it on low performance to 
read the whole store file?
thanks!james.                                     

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