运行impala tpch

1.安装git和下载tpc-h-impala脚步

[root@ip-172-31-34-31 ~]# yum install git

[root@ip-172-31-34-31 ~]# git clone https://github.com/kj-ki/tpc-h-impala

[root@ip-172-31-34-31 ~]# cd tpc-h-impala/

[root@ip-172-31-34-31 tpc-h-impala]# ls
benchmark.conf confs data README.md tpch_benchmark.sh tpch_hive tpch_impala tpch_prepare

2.将tpch dbgen tool生成好的数据移动到指定目录
[root@ip-172-31-34-31 data]# mv /root/tpch_2_17_0/data10g/*.tbl /root/tpc-h-impala/data

3.调整tpc-h-impala脚本

由于涉及到权限问题，调整tpch_prepare_data.sh脚步:将第一行改为如下：
sudo -u hdfs /usr/bin/hadoop fs -mkdir /tpch/
并增加一行：
sudo -u hdfs /usr/bin/hadoop fs -chown root /tpch

4.运行脚步tpch_prepare_data.sh,将数据从本地写到HDFS

[root@ip-172-31-34-31 data]# ./tpch_prepare_data.sh

5.调整tpch_benchmark.sh脚本
由于在运行过程中会在Hive上建表，这些表要对impala可见，需要运行invalidate metadata，在运行impala查询的语句前加入以下一行

$IMPALA_CMD -q 'invalidate metadata' 2>&1

#!/usr/bin/env bash

# set up configurations
source benchmark.conf;

if [ -e "$LOG_FILE" ]; then
        timestamp=`date "+%F-%R" --reference=$LOG_FILE`
        backupFile="$LOG_FILE.$timestamp"
        mv $LOG_FILE $LOG_DIR/$backupFile
fi

echo ""
echo "***********************************************"
echo "*          TPC-H benchmark on Impala          *"
echo "***********************************************"
echo "                                               "
echo "See $LOG_FILE for more details of query errors."
echo ""

trial=
while [ $trial -lt $NUM_OF_TRIALS ]; do
        trial=`expr $trial + `
        echo "Executing Trial #$trial of $NUM_OF_TRIALS trial(s)..."

        for query in ${TPCH_QUERIES_ALL[@]}; do
                echo "Running query: $query" | tee -a $LOG_FILE

                echo "Running Hive prepare query: $query" >> $LOG_FILE
                $TIME_CMD $HIVE_CMD -f $BASE_DIR/tpch_prepare/${query}.hive >& | tee -a $LOG_FILE | grep '^Time:'
                returncode=${PIPESTATUS[]}
                if [ $returncode -ne  ]; then
                        echo "ABOVE QUERY FAILED:$returncode"
                fi

                # If you want to use old beta, enable below.
                #$TIME_CMD $IMPALA_CMD -q 'refresh' >& | tee -a $LOG_FILE | grep '^Time:'
                #returncode=${PIPESTATUS[]}
                #if [ $returncode -ne 0 ]; then
                #       echo "ABOVE QUERY FAILED:$returncode"
                #fi

                echo "Running Impala query: $query" >> $LOG_FILE
                $IMPALA_CMD -q 'invalidate metadata' >&
                $TIME_CMD $IMPALA_CMD --query_file=$BASE_DIR/tpch_impala/${query}.impala >& | tee -a $LOG_FILE | grep '^Time:'
                returncode=${PIPESTATUS[]}
                if [ $returncode -ne  ]; then
                        echo "ABOVE QUERY FAILED:$returncode"
                fi

                #echo "Running Hive query: $query" >> $LOG_FILE
                #$TIME_CMD $HIVE_CMD -f $BASE_DIR/tpch_hive/${query}.hive >& | tee -a $LOG_FILE | grep '^Time:'
                #returncode=${PIPESTATUS[]}
                #if [ $returncode -ne 0 ]; then
                #       echo "ABOVE QUERY FAILED:$returncode"
                #fi
        done

done # TRIAL
echo "***********************************************"

6.修改配置文件benchmark.conf，使指向正确的impala master:

由于在impala-shell的集群上没有配置impala-daemon，所以需要这个修改
# impala
IMPALA_CMD="/usr/bin/impala-shell --impalad=172.31.25.244:21000"

7.mr,hive,impala
注意，要运行impala,hive必须先启动MR

8.运行benmark脚本
[root@ip-172-31-34-31 tpc-h-impala]# pwd
/root/tpc-h-impala
[root@ip-172-31-34-31 tpc-h-impala]# ./tpch_benchmark.sh