hive partitioned and unpartitioned tables runtime and cpu time
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I currently have a table below
create table flights(Year int, Month int, dayOfMonth int, dayOfWeek
int, depTime int, CRSDepTime int, arrTime int, CRSArrTime int,
uniqueCarrier string, flightNum int, tailNum int, actualElapsedTime
int, CRSElapsedTime int, airTime int, arrDelay int, depDelay int,
origin string, dest string, distance int, taxiIn int, taxiOut int,
cancelled int, cancellationCode string, diverted int, carrierDelay
int, weatherDelay int, NASDelay int, securityDelay int,
lateAircraftDelay int) row format delimited fields terminated by ',';
and, I partitioned this table using month column, and comparing the CPU time and total time taken. I can see that CPU time decreased dramatically on partitioned table compared to unpartitioned table. However, for the total time taken, both are the same.
note : I am using the database that has 22 years of all flights in the past. so the amount of data is huge.
I want to know why CPU time decreased and total time are still same.
mysql database hive partition
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
add a comment |
I currently have a table below
create table flights(Year int, Month int, dayOfMonth int, dayOfWeek
int, depTime int, CRSDepTime int, arrTime int, CRSArrTime int,
uniqueCarrier string, flightNum int, tailNum int, actualElapsedTime
int, CRSElapsedTime int, airTime int, arrDelay int, depDelay int,
origin string, dest string, distance int, taxiIn int, taxiOut int,
cancelled int, cancellationCode string, diverted int, carrierDelay
int, weatherDelay int, NASDelay int, securityDelay int,
lateAircraftDelay int) row format delimited fields terminated by ',';
and, I partitioned this table using month column, and comparing the CPU time and total time taken. I can see that CPU time decreased dramatically on partitioned table compared to unpartitioned table. However, for the total time taken, both are the same.
note : I am using the database that has 22 years of all flights in the past. so the amount of data is huge.
I want to know why CPU time decreased and total time are still same.
mysql database hive partition
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
1
for which query?
– Gaurang Shah
Nov 27 '18 at 1:27
add a comment |
I currently have a table below
create table flights(Year int, Month int, dayOfMonth int, dayOfWeek
int, depTime int, CRSDepTime int, arrTime int, CRSArrTime int,
uniqueCarrier string, flightNum int, tailNum int, actualElapsedTime
int, CRSElapsedTime int, airTime int, arrDelay int, depDelay int,
origin string, dest string, distance int, taxiIn int, taxiOut int,
cancelled int, cancellationCode string, diverted int, carrierDelay
int, weatherDelay int, NASDelay int, securityDelay int,
lateAircraftDelay int) row format delimited fields terminated by ',';
and, I partitioned this table using month column, and comparing the CPU time and total time taken. I can see that CPU time decreased dramatically on partitioned table compared to unpartitioned table. However, for the total time taken, both are the same.
note : I am using the database that has 22 years of all flights in the past. so the amount of data is huge.
I want to know why CPU time decreased and total time are still same.
mysql database hive partition
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
I currently have a table below
create table flights(Year int, Month int, dayOfMonth int, dayOfWeek
int, depTime int, CRSDepTime int, arrTime int, CRSArrTime int,
uniqueCarrier string, flightNum int, tailNum int, actualElapsedTime
int, CRSElapsedTime int, airTime int, arrDelay int, depDelay int,
origin string, dest string, distance int, taxiIn int, taxiOut int,
cancelled int, cancellationCode string, diverted int, carrierDelay
int, weatherDelay int, NASDelay int, securityDelay int,
lateAircraftDelay int) row format delimited fields terminated by ',';
and, I partitioned this table using month column, and comparing the CPU time and total time taken. I can see that CPU time decreased dramatically on partitioned table compared to unpartitioned table. However, for the total time taken, both are the same.
note : I am using the database that has 22 years of all flights in the past. so the amount of data is huge.
I want to know why CPU time decreased and total time are still same.
mysql database hive partition
mysql database hive partition
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
asked Nov 27 '18 at 1:22
Geongu Aiden ParkGeongu Aiden Park
1916
1916
1
for which query?
– Gaurang Shah
Nov 27 '18 at 1:27
add a comment |
1
for which query?
– Gaurang Shah
Nov 27 '18 at 1:27
1
1
for which query?
– Gaurang Shah
Nov 27 '18 at 1:27
for which query?
– Gaurang Shah
Nov 27 '18 at 1:27
add a comment |
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1
for which query?
– Gaurang Shah
Nov 27 '18 at 1:27