Hello Presto

◎ 架構

◎ 安裝條件

依照 http://prestodb.io/overview.html 其中要求jdk必須是1.8, 否則啟動會報錯版本不匹配.

◎ 配置文件

在presto-server安裝目錄下新建etc目錄, 并新建以下配置文件和catalog目錄

數據源可以選擇jmx, hive等. 如果在這里配置了hive, 則要在catalog目錄下新建1個hive.properties文件

http://yugouai.iteye.com/blog/2002504 這篇博客里由兩個配置在新版本中不支持

presto-metastore.db.type=h2

presto-metastore.db.filename=var/db/MetaStore

◎ 啟動presto-server

hadoop@hadoop:~/soft/presto-server-0.89$ bin/launcher run

啟動的進程報以下錯, 這個暫時發現對下面的實驗沒有影響

2015-01-09T10:03:27.784+0800 ERROR Discovery-0 io.airlift.discovery.client.CachingServiceSelector Cannot connect to discovery server for refresh (collector/general): Lookup of collector failed for http://localhost:8080/v1/service/collector/general

2015-01-09T10:03:27.800+0800 ERROR Discovery-0 io.airlift.discovery.client.CachingServiceSelector Cannot connect to discovery server for refresh (presto/general): Lookup of presto failed for http://localhost:8080/v1/service/presto/general

◎ 命令行接口

http://prestodb.io/docs/current/installation/cli.html 

hadoop@hadoop:~/install/bigdata/nosql$ ln -s presto-cli-0.89-executable.jar presto-cli

jmx connection

http://prestodb.io/docs/current/connector/jmx.html 

hadoop@hadoop:~/install/bigdata/nosql$ ./presto-cli --server localhost:8080 --catalog jmx --schema jmx

bash: ./presto-cli: 權限不夠

hadoop@hadoop:~/install/bigdata/nosql$ chmod 755 presto-cli*

hadoop@hadoop:~/install/bigdata/nosql$ ./presto-cli --server localhost:8080 --catalog jmx --schema jmx

presto:jmx> SHOW TABLES FROM jmx.jmx;

                                                                      Table                                                                       

--------------------------------------------------------------------------------------

 com.facebook.presto.execution:name=nodescheduler                                                                                                 

 com.facebook.presto.execution:name=queryexecution                                                                                                

 com.facebook.presto.execution:name=querymanager                                                                                                  

 com.facebook.presto.execution:name=remotetaskfactory                                                                                             

 com.facebook.presto.execution:name=taskexecutor                                                                                                  

 com.facebook.presto.execution:name=taskmanager 

presto:jmx> SELECT node, vmname, vmversion

         -> FROM jmx.jmx."java.lang:type=runtime";

                 node                 |              vmname               | vmversion 

--------------------------------------+-----------------------------------+-----------

 ffffffff-ffff-ffff-ffff-ffffffffffff | Java HotSpot(TM) 64-Bit Server VM | 25.25-b02 

(1 row)

Query 20150109_022500_00003_nex2n, FINISHED, 1 node

Splits: 2 total, 2 done (100.00%)

0:00 [1 rows, 78B] [7 rows/s, 623B/s]

presto:jmx> SELECT openfiledescriptorcount, maxfiledescriptorcount

         -> FROM jmx.jmx."java.lang:type=operatingsystem";

 openfiledescriptorcount | maxfiledescriptorcount 

-------------------------+------------------------

                     564 |                   4096 

(1 row)

Query 20150109_022517_00004_nex2n, FINISHED, 1 node

Splits: 2 total, 2 done (100.00%)

0:00 [1 rows, 16B] [14 rows/s, 238B/s]

hadoop@hadoop:~/install/bigdata/nosql$ jps -lm

9890 ./presto-cli --server localhost:8080 --catalog jmx --schema jmx

10469 sun.tools.jps.Jps -lm

9002 com.facebook.presto.server.PrestoServer

點擊第1個Job

hive connection

http://prestodb.io/docs/current/connector/hive.html 

hadoop@hadoop:~/soft/presto-server-0.89/etc$ cat config.properties 

coordinator=true

datasources=jmx,hive

node-scheduler.include-coordinator=true

http-server.http.port=8080

task.max-memory=1GB

discovery-server.enabled=true

discovery.uri=http://localhost:8080

hadoop@hadoop:~/soft/presto-server-0.89/etc$ cat catalog/hive.properties 

connector.name=hive-cdh5

hive.metastore.uri=thrift://localhost:9083

hadoop@hadoop:~/soft/cdh5.2.0/hive-0.13.1-cdh5.2.0/conf$ tail -f hive-site.xml 

<property>

  <name>hive.metastore.uris</name>

  <value>thrift://localhost:9083</value>

</property>

</configuration>

啟動hive-meta和hive-server2

hive --service hiveserver2 &

hive --service metastore &

hadoop@hadoop:~/install/bigdata/nosql$ ./presto-cli --server localhost:8080 --catalog hive --schema default

presto:default> DESCRIBE hive.saledata.tbldate;   ==> saledata表示hive中的database

    Column    |  Type   | Null | Partition Key | Comment 

--------------+---------+------+---------------+---------

 dateid       | varchar | true | false         |         

 theyearmonth | varchar | true | false         |         

 theyear      | varchar | true | false         |         

 themonth     | varchar | true | false         |         

 thedate      | varchar | true | false         |         

 theweek      | varchar | true | false         |         

 theweeks     | varchar | true | false         |         

 thequot      | varchar | true | false         |         

 thetenday    | varchar | true | false         |         

 thehalfmonth | varchar | true | false         |         

(10 rows)

Query 20150109_072540_00010_scd3k, FINISHED, 1 node

Splits: 2 total, 2 done (100.00%)

0:00 [10 rows, 2.03KB] [51 rows/s, 10.4KB/s]

presto:default> select * from hive.saledata.tbldate;

   dateid   | theyearmonth | theyear | themonth | thedate | theweek | theweeks | thequot | thetenday | thehalfmonth 

------------+--------------+---------+----------+---------+---------+----------+---------+-----------+--------------

 2003⑴⑴   | 200301       | 2003    | 1        | 1       | 3       | 1        | 1       | 1         | 1            

 2003⑴⑵   | 200301       | 2003    | 1        | 2       | 4       | 1        | 1       | 1         | 1            

 2003⑴⑶   | 200301       | 2003    | 1        | 3       | 5       | 1        | 1       | 1         | 1            

 2003⑴⑷   | 200301       | 2003    | 1        | 4       | 6       | 1        | 1       | 1         | 1            

 2003⑴⑸   | 200301       | 2003    | 1        | 5       | 7       | 1        | 1       | 1         | 1            

 2003⑴⑹   | 200301       | 2003    | 1        | 6       | 1       | 2        | 1       | 1         | 1  

presto:default> select count(*) from hive.saledata.tbldate;

 _col0 

-------

  4383 

(1 row)

Query 20150109_072649_00012_scd3k, FINISHED, 1 node

Splits: 2 total, 2 done (100.00%)

0:00 [4.38K rows, 172KB] [23.5K rows/s, 922KB/s]

presto:default> 

對照hive使用count(*)查詢

hive> use saledata;

hive> desc tbldate;                

OK

dateid               string                                   

theyearmonth         string                                   

theyear              string                                   

themonth             string                                   

thedate              string                                   

theweek              string                                   

theweeks             string                                   

thequot              string                                   

thetenday            string                                   

thehalfmonth         string                                   

Time taken: 0.075 seconds, Fetched: 10 row(s)

hive> select count(*) from tbldate;

Total jobs = 1

Launching Job 1 out of 1

Number of reduce tasks determined at compile time: 1

In order to change the average load for a reducer (in bytes):

  set hive.exec.reducers.bytes.per.reducer=<number>

In order to limit the maximum number of reducers:

  set hive.exec.reducers.max=<number>

In order to set a constant number of reducers:

  set mapreduce.job.reduces=<number>

Starting Job = job_1420787592849_0001, Tracking URL = http://localhost:8088/proxy/application_1420787592849_0001/

Kill Command = /home/hadoop/soft/cdh5.2.0/hadoop⑵.5.0-cdh5.2.0/bin/hadoop job  -kill job_1420787592849_0001

Hadoop job information for Stage⑴: number of mappers: 1; number of reducers: 1

2015-01-09 15:27:16,054 Stage⑴ map = 0%,  reduce = 0%

2015-01-09 15:27:21,318 Stage⑴ map = 100%,  reduce = 0%, Cumulative CPU 1.03 sec

2015-01-09 15:27:27,555 Stage⑴ map = 100%,  reduce = 100%, Cumulative CPU 2.49 sec

MapReduce Total cumulative CPU time: 2 seconds 490 msec

Ended Job = job_1420787592849_0001

MapReduce Jobs Launched: 

Stage-Stage⑴: Map: 1  Reduce: 1   Cumulative CPU: 2.49 sec   HDFS Read: 176119 HDFS Write: 5 SUCCESS

Total MapReduce CPU Time Spent: 2 seconds 490 msec

OK

4383

Time taken: 21.025 seconds, Fetched: 1 row(s)

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