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From "Dimitri Capitaine (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-3112) Partial row scan not handled correctly
Date Fri, 02 Dec 2016 23:34:58 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15716863#comment-15716863
] 

Dimitri Capitaine commented on PHOENIX-3112:
--------------------------------------------

we do some test with hbase.client.scanner.caching (default Integer.MAX) and hbase.client.scanner.max.result.size
(default 2Mo) with rows size = ~1452o.
if we use hbase.client.scanner.max.result.size limit, we facing with the same problem, 
but decrease hbase.client.scanner.caching <= 1000 (1000*1452o < 2Mo) resolve our problem.
For some performance test we decrease  hbase.client.scanner.caching to 100.
result from 100 to 1000 the performance result was the same. so we set to 100 AND now it's
ok and we have better performance with pig (x2) .



> Partial row scan not handled correctly
> --------------------------------------
>
>                 Key: PHOENIX-3112
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3112
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.7.0
>            Reporter: Pierre Lacave
>
> When doing a select of a relatively large table (a few touthands rows) some rows return
partially missing.
> When increasing the fitler to return those specific rows, the values appear as expected
> {noformat}
> CREATE TABLE IF NOT EXISTS TEST (
>         BUCKET VARCHAR,
>         TIMESTAMP_DATE TIMESTAMP,
>         TIMESTAMP UNSIGNED_LONG NOT NULL,
>         SRC VARCHAR,
>         DST VARCHAR,
>         ID VARCHAR,
>         ION VARCHAR,
>         IC BOOLEAN NOT NULL,
>         MI UNSIGNED_LONG,
>         AV UNSIGNED_LONG,
>         MA UNSIGNED_LONG,
>         CNT UNSIGNED_LONG,
>         DUMMY VARCHAR
>     CONSTRAINT pk PRIMARY KEY (BUCKET, TIMESTAMP DESC, SRC, DST, ID, ION, IC)
> );{noformat}
> using a python script to generate a CSV with 5000 rows
> {noformat}
> for i in xrange(5000):
>     print "5SEC,2016-07-21 07:25:35.{i},146908593500{i},WWWWWWWW,AAA,BBBB,CCCCCCCC,false,{i}1181000,1788000{i},2497001{i},{i},aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa{i}".format(i=i)
> {noformat}
> bulk inserting the csv in the table
> {noformat}
> phoenix/bin/psql.py localhost -t TEST large.csv
> {noformat}
> here we can see one row that contains no TIMESTAMP_DATE and null values in MI and MA
> {noformat}
> 0: jdbc:phoenix:localhost:2181> select * from TEST 
> ....
> +---------+--------------------------+-------------------+-----------+------+-------+-----------+--------+--------------+--------------+--------------+-------+----------------------------------------------------------------------------+
> | BUCKET  |      TIMESTAMP_DATE      |     TIMESTAMP     |    SRC    | DST  |  ID   |
   ION    |   IC   |      MI      |      AV      |      MA      |  CNT  |                
                  DUMMY                                    |
> +---------+--------------------------+-------------------+-----------+------+-------+-----------+--------+--------------+--------------+--------------+-------+----------------------------------------------------------------------------+
> | 5SEC    | 2016-07-21 07:25:35.100  | 1469085935001000  | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | 10001181000  | 17880001000  | 24970011000  | 1000  | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1000
 |
> | 5SEC    | 2016-07-21 07:25:35.999  | 146908593500999   | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | 9991181000   | 1788000999   | 2497001999   | 999   | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa999
  |
> | 5SEC    | 2016-07-21 07:25:35.998  | 146908593500998   | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | 9981181000   | 1788000998   | 2497001998   | 998   | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa998
  |
> | 5SEC    |                          | 146908593500997   | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | null         | 1788000997   | null         | 997   |                
                                                           |
> | 5SEC    | 2016-07-21 07:25:35.996  | 146908593500996   | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | 9961181000   | 1788000996   | 2497001996   | 996   | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa996
  |
> | 5SEC    | 2016-07-21 07:25:35.995  | 146908593500995   | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | 9951181000   | 1788000995   | 2497001995   | 995   | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa995
  |
> | 5SEC    | 2016-07-21 07:25:35.994  | 146908593500994   | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | 9941181000   | 1788000994   | 2497001994   | 994   | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa994
  |
> ....
> {noformat}
> but when selecting that row specifically the values are correct
> {noformat}
> 0: jdbc:phoenix:localhost:2181> select * from TEST where timestamp = 146908593500997;
> +---------+--------------------------+------------------+-----------+------+-------+-----------+--------+-------------+-------------+-------------+------+---------------------------------------------------------------------------+
> | BUCKET  |      TIMESTAMP_DATE      |    TIMESTAMP     |    SRC    | DST  |  ID   |
   ION    |   IC   |     MI      |     AV      |     MA      | CNT  |                    
              DUMMY                                   |
> +---------+--------------------------+------------------+-----------+------+-------+-----------+--------+-------------+-------------+-------------+------+---------------------------------------------------------------------------+
> | 5SEC    | 2016-07-21 07:25:35.997  | 146908593500997  | WWWWWWWW  | AAA  | BBBB  |
CCCCCCCC  | false  | 9971181000  | 1788000997  | 2497001997  | 997  | aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa997
 |
> +---------+--------------------------+------------------+-----------+------+-------+-----------+--------+-------------+-------------+-------------+------+---------------------------------------------------------------------------+
> 1 row selected (0.159 seconds){noformat}



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