Hi,
I have a fact table in Hive imported from Sybase IQ via SQOOP with 1 billion
rows as follows:
show create table sales;
+---------------------------------------------------------------------------
----+--+
| createtab_stmt
|
+---------------------------------------------------------------------------
----+--+
| CREATE TABLE `sales`(
|
| `prod_id` bigint,
|
| `cust_id` bigint,
|
| `time_id` timestamp,
|
| `channel_id` bigint,
|
| `promo_id` bigint,
|
| `quantity_sold` decimal(10,0),
|
| `amount_sold` decimal(10,0))
|
| CLUSTERED BY (
|
| prod_id,
|
| cust_id,
|
| time_id,
|
| channel_id,
|
| promo_id)
|
| INTO 256 BUCKETS
|
| ROW FORMAT SERDE
|
| 'org.apache.hadoop.hive.ql.io.orc.OrcSerde'
|
| STORED AS INPUTFORMAT
|
| 'org.apache.hadoop.hive.ql.io.orc.OrcInputFormat'
|
| OUTPUTFORMAT
|
| 'org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat'
|
| LOCATION
|
| 'hdfs://rhes564:9000/user/hive/warehouse/oraclehadoop.db/sales'
|
| TBLPROPERTIES (
|
| 'COLUMN_STATS_ACCURATE'='true',
|
| 'last_modified_by'='hduser',
|
| 'last_modified_time'='1451305626',
|
| 'numFiles'='11',
|
| 'numRows'='1000000000',
|
|
'orc.bloom.filter.columns'='PROD_ID,CUST_ID,TIME_ID,CHANNEL_ID,PROMO_ID',
|
| 'orc.bloom.filter.fpp'='0.05',
|
| 'orc.compress'='SNAPPY',
|
| 'orc.create.index'='true',
|
| 'orc.row.index.stride'='10000',
|
| 'orc.stripe.size'='268435456',
|
| 'rawDataSize'='296000000000',
|
| 'totalSize'='2678882153',
|
| 'transient_lastDdlTime'='1451305626')
|
+---------------------------------------------------------------------------
----+--+
I use the following query to run against sales table only against Hive
SELECT
rs.Customer_ID
, rs.Number_of_orders
, rs.Total_customer_amount
, rs.Average_order
, rs.Standard_deviation
FROM
(
SELECT cust_id AS Customer_ID,
COUNT(amount_sold) AS Number_of_orders,
SUM(amount_sold) AS Total_customer_amount,
AVG(amount_sold) AS Average_order,
stddev_samp(amount_sold) AS Standard_deviation
FROM sales
GROUP BY cust_id
HAVING SUM(amount_sold) > 94000
AND AVG(amount_sold) < stddev_samp(amount_sold)
) rs
ORDER BY
-- Total_customer_amount DESC
3 DESC
Hive comes back in 17 minutes with 5,948 rows
bl -f sales.hql > sales.log
Connecting to jdbc:hive2://rhes564:10010/default
Connected to: Apache Hive (version 1.2.1)
Driver: Hive JDBC (version 1.2.1)
Transaction isolation: TRANSACTION_REPEATABLE_READ
Running init script /home/hduser/dba/bin/hive_on_spark_init.hql
No rows affected (0.097 seconds)
No rows affected (0.001 seconds)
No rows affected (0.001 seconds)
No rows affected (0.038 seconds)
INFO : Warning: Using constant number 3 in order by. If you try to use
position alias when hive.groupby.orderby.position.alias is false, the
position alias will be ignored.
INFO :
Query Hive on Spark job[0] stages:
INFO : 0
INFO : 1
INFO : 2
INFO :
Status: Running (Hive on Spark job[0])
INFO : Job Progress Format
CurrentTime StageId_StageAttemptId:
SucceededTasksCount(+RunningTasksCount-FailedTasksCount)/TotalTasksCount
[StageCost]
INFO : 2015-12-29 09:33:25,815 Stage-0_0: 0/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:28,829 Stage-0_0: 0/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:31,857 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:34,875 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:37,903 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:40,918 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:43,939 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:46,958 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:49,971 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:52,991 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:33:56,007 Stage-0_0: 0(+2)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:50:03,578 Stage-0_0: 10(+1)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:50:06,590 Stage-0_0: 10(+1)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:50:09,602 Stage-0_0: 10(+1)/11 Stage-1_0: 0/1009
Stage-2_0: 0/1
INFO : 2015-12-29 09:50:10,606 Stage-0_0: 11/11 Finished Stage-1_0:
0(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:11,610 Stage-0_0: 11/11 Finished Stage-1_0:
6(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:12,618 Stage-0_0: 11/11 Finished Stage-1_0:
30(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:13,622 Stage-0_0: 11/11 Finished Stage-1_0:
59(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:14,626 Stage-0_0: 11/11 Finished Stage-1_0:
90(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:15,631 Stage-0_0: 11/11 Finished Stage-1_0:
124(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:16,654 Stage-0_0: 11/11 Finished Stage-1_0:
160(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:17,659 Stage-0_0: 11/11 Finished Stage-1_0:
193(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:18,663 Stage-0_0: 11/11 Finished Stage-1_0:
228(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:19,667 Stage-0_0: 11/11 Finished Stage-1_0:
262(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:20,672 Stage-0_0: 11/11 Finished Stage-1_0:
298(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:21,679 Stage-0_0: 11/11 Finished Stage-1_0:
338(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:22,687 Stage-0_0: 11/11 Finished Stage-1_0:
376(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:23,691 Stage-0_0: 11/11 Finished Stage-1_0:
417(+3)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:24,696 Stage-0_0: 11/11 Finished Stage-1_0:
460(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:25,699 Stage-0_0: 11/11 Finished Stage-1_0:
502(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:26,707 Stage-0_0: 11/11 Finished Stage-1_0:
542(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:27,712 Stage-0_0: 11/11 Finished Stage-1_0:
584(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:28,719 Stage-0_0: 11/11 Finished Stage-1_0:
624(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:29,730 Stage-0_0: 11/11 Finished Stage-1_0:
667(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:30,736 Stage-0_0: 11/11 Finished Stage-1_0:
709(+3)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:31,740 Stage-0_0: 11/11 Finished Stage-1_0:
754(+3)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:32,743 Stage-0_0: 11/11 Finished Stage-1_0:
797(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:33,747 Stage-0_0: 11/11 Finished Stage-1_0:
844(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:34,754 Stage-0_0: 11/11 Finished Stage-1_0:
888(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:35,759 Stage-0_0: 11/11 Finished Stage-1_0:
934(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:36,764 Stage-0_0: 11/11 Finished Stage-1_0:
981(+2)/1009 Stage-2_0: 0/1
INFO : 2015-12-29 09:50:37,768 Stage-0_0: 11/11 Finished Stage-1_0:
1009/1009 Finished Stage-2_0: 0(+1)/1
INFO : 2015-12-29 09:50:38,771 Stage-0_0: 11/11 Finished Stage-1_0:
1009/1009 Finished Stage-2_0: 1/1 Finished
INFO : Status: Finished successfully in 1036.00 seconds
5,948 rows selected (1074.817 seconds)
So it returns 5948 rows in 17 minutes. In contrast IQ returns 5947 rows in
23 seconds
Sybase IQ is a columnar database so each column is created as a fast
projection index by default. In addition I have created LF (bitmap) indexes
on dimension columns (PROD_ID, CUST_ID, TIME_ID, CHANNEL_ID, PROMO_ID). Now
the query only touches CUST_ID.
My suspicion is that it is the Standard Deviation function stddev_samp()
that could be the bottleneck?
Thanks
Mich Talebzadeh
Sybase ASE 15 Gold Medal Award 2008
A Winning Strategy: Running the most Critical Financial Data on ASE 15
<http://login.sybase.com/files/Product_Overviews/ASE-Winning-Strategy-091908
.pdf>
http://login.sybase.com/files/Product_Overviews/ASE-Winning-Strategy-091908.
pdf
Author of the books "A Practitioner's Guide to Upgrading to Sybase ASE 15",
ISBN 978-0-9563693-0-7.
co-author "Sybase Transact SQL Guidelines Best Practices", ISBN
978-0-9759693-0-4
Publications due shortly:
Complex Event Processing in Heterogeneous Environments, ISBN:
978-0-9563693-3-8
Oracle and Sybase, Concepts and Contrasts, ISBN: 978-0-9563693-1-4, volume
one out shortly
<http://talebzadehmich.wordpress.com/> http://talebzadehmich.wordpress.com
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