hive中rcfile orcfile和parquetfile对比

一.开始创建三种格式的表:

create table rcfile (name string,age int,addr string,desc string) row format delimited fields terminated by ',' stored as rcfile;
create table rcfile (name string,age int,addr string,desc string) row format delimited fields terminated by ',' stored as orcfile;
create table rcfile (name string,age int,addr string,desc string) row format delimited fields terminated by ',' stored as parquetfile;

二.用shell生成1000W条数据，以”,”隔开，并且load data overwrite到 textfile表里面

三.分别把数据insert到三个表中:

insert into rcfile select * from lijie.textfile;
insert into orcfile select * from lijie.textfile;
insert into parquetfile select * from lijie.textfile;

四.开始测试

1.select * from xxfile       
    rcfile       Time taken: 47.604 seconds, Fetcheds 13756317 row(s)
    orcfile      Time taken: 2.563 seconds, Fetcheds 13756317 row(s)
    parquetfile  Time taken: 43.454 seconds, Fetcheds 13756317 row(s)
结论orcfile 小于 rcfile 小于 parquet

2.select name,addr from xxfile
    rcfile       Time taken: 36.937 seconds, Fetcheds 13756317 row(s)
    orcfile      Time taken: 2.514 seconds, Fetcheds 13756317 row(s)
    parquetfile  Time taken: 43.454 seconds, Fetcheds 13756317 row(s)
结论orcfile 小于 rcfile 小于 parquet

3.select max(name) from xxfile
    rcfile       Time taken: 34.375 seconds, Fetcheds 13756317 row(s)
    orcfile      Time taken: 30.073 seconds, Fetcheds 13756317 row(s)
    parquetfile  Time taken: 38.352 seconds, Fetcheds 13756317 row(s)
结论orcfile 小于 rcfile 小于 parquet

4.select count(1) from xxfile
    rcfile       Time taken: 32.261 seconds, Fetcheds 13756317 row(s)
    orcfile      Time taken: 28.959 seconds, Fetcheds 13756317 row(s)
    parquetfile  Time taken: 32.265 seconds, Fetcheds 13756317 row(s)
结论orcfile 小于 rcfile=parquet

五.总结
总数据量13756317
列：name,age,addr,desc
orcfile 查询效果更优，rcfile效果略好于parquetfile