impala

How to get the impala query output log into a variable using unix shell script?

由 坚强是说给别人听的谎言 提交于 2019-12-08 07:00:19
问题 I'm creating unix shell script to execute the impala query. I need to get the output log of impala query. For example I tried the below. output_log = echo $(impala-shell -i $node -q "select name from impaladb.impalatbl" -o output_file) Output: +--------+ | name | +--------+ | tom | | mike | +--------+ Fetched 2 row(s) in 0.83s Here I'm getting the two name output in both output_file and output_log. But I need the "Fetched 2 row(s) in 0.83s" log in output_log variable. How can I get it? 回答1: I

Connect R and Impala

由 邮差的信 提交于 2019-12-06 13:51:41
问题 I know of course about reproducible example and piece of code but for this question I have to be (I can't be otherwise) obscure. I am trying to connect R and Impala. Putting aside the problems ("officially", I cannot install software on this PC... but I have used portable versions of R and RStudio) I've tried the RImpala package. rimpala.connect(IP = myip, port = the port where Impala sees, principal = maybe this is not clear) I am pretty sure that the causes of my problems is the principal

about how to run impala-shell within a shell script

由 半腔热情 提交于 2019-12-06 13:17:23
问题 i have a problem when trying to execute this bash code: function createImpalaPartition() { period_id=$1; database=$2 node=$3 actual_full=$(date -d@"$period_id" +%Y/%m/%d/%H/%M/) template="use c2d;create EXTERNAL TABLE exptopology_$period_id (child_id bigint,parent_id bigint,level INT) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' WITH SERDEPROPERTIES ('serialization.format'=',', 'field.delim'=',') STORED AS TEXTFILE LOCATION '/hfc/sip/service/topology/$actual_full'" echo "template is

impala进阶

由 寵の児 提交于 2019-12-06 12:15:39
一、impala存储 1、文件类型 2、压缩方式 二、impala分区 1、创建分区方式 partitioned by 创建表时，添加该字段指定分区列表： create table t_person(id int, name string, age int) partitioned by (type string); 使用alter table 进行分区的添加和删除操作： alter table t_person add partition (sex=‘man'); alter table t_person drop partition (sex=‘man'); alter table t_person drop partition (sex=‘man‘,type=‘boss’); 2、分区内添加数据 insert into t_person partition (type='boss') values (1,’zhangsan’,18),(2,’lisi’,23) insert into t_person partition (type='coder') values (3,wangwu’,22),(4,’zhaoliu’,28),(5,’tianqi’,24) 3、查询指定分区 select id,name from t_person where type=‘coder’ 三

Kudu与Impala在字符串处理上与其他DB的迥异

由 放肆的年华 提交于 2019-12-06 11:42:44
Kudu的时间戳类型，在Impala建表上用的是timestamp， 有2个与众不同的地方。 1. 在Kudu里它存的时间戳是纳秒级别，所以你普通的时间戳存进去需要*1000。 2. 另外，Kudu的时间戳里面存的是，UTC时间。所以存进去的时间需要自己转换时区。 2. Impala在读取时间戳的时候，会根据配置项，使用系统的本地时区。 配置了如下： -use_local_tz_for_unix_timestamp_conversions 从而导致数据加载异常。建议有条件的同学，使用字符串替代时间戳。 来源： https://my.oschina.net/dacoolbaby/blog/3137199

How to install Impala on Ubuntu? [closed]

由 可紊 提交于 2019-12-06 07:29:15
Closed. This question is off-topic . It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I want to install Impala on an Ubuntu instance. So far, none of the methods below didn't work. How can I install a stable version of Impala in Ubuntu? Failed method nr. 1: apt-get First I tried to install binaries using sudo apt-get update sudo apt-get install impala sudo apt-get install impala-server sudo apt-get install impala-state-store However, there are problems with the public key of Impala's repository:

Control data locality in Impala by partitioning

由 浪子不回头ぞ 提交于 2019-12-06 06:31:41
问题 I would like to avoid Impala nodes unnecessarily requesting data from other nodes over the network in cases when the ideal data locality or layout is known at table creation time. This would be helpful with 'non-additive' operations where all records from a partition are needed at the same place (node) anyway (for ex. percentiles). Is it possible to tell Impala that all data in a partition should always be co-located on a single node for any HDFS replica? In Impala-SQL, I am not sure if the

How to set configuration in Hive-Site.xml file for hive metastore connection?

由 醉酒当歌 提交于 2019-12-06 05:01:16
问题 I want to connect MetaStore using the java code. I have no idea how to set configuration setting in Hive-Site.xml file and where I'll post the Hive-Site.xml file. Please help. import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; import org.apache.hadoop.fs.Path; import org.apache.hadoop.hive.conf.HiveConf; import org.apache.hadoop.hive.conf.HiveConf.ConfVars; public class HiveMetastoreJDBCTest { public static void main(String[] args)

Cloudera Impala：基于Hadoop的实时查询开源项目

由 狂风中的少年 提交于 2019-12-06 03:02:26
正在纽约进行的大数据技术会议 Strata Conference + Hadoop World 传来消息， Cloudera 发布了实时查询开源项目 Impala 1.0 beta版 ，称比原来基于MapReduce的Hive SQL查询速度提升3～90倍 （详情可以参考 此文 中的“ How much faster are Impala queries than Hive ones, really? ”部分） ，而且更加灵活易用。Impala是高角羚的意思，这种羚羊主要分布在东非。 同时，这个项目也将以 Cloudera Enterprise RTQ （Real-Time Query）为名进入CDH发行版。可以部署到生产环境的版本将到2013年一季度就绪。不过，据 ComputerWorld 和 MarketWatch 的报道， Capgemini金融服务、Karmasphere、MicroStrategy、Pentaho、Qlikview和Tableau等已经在Impala上做了几个月的实际产品测试。 众所周知，Hadoop及HBase、HDFS其实是在Google的MapReduce、BigTable和GFS三篇论文的启发下开发出来的。而近年来Google的基础架构又有了一波新的革新，有媒体称之为 后Hadoop时代的三驾马车 Caffeine、Pregel和Dremel

HDP上安装impala

由 别来无恙 提交于 2019-12-06 03:02:13
Impala是Cloudera公司主导开发的新型查询系统，它提供SQL语义，能查询存储在Hadoop的HDFS和HBase中的PB级大数据。Impala提供更快的查询速度，性能上号称比Hive快3~10倍。Impala是开源的，但一般都是通过cloudera manager或者在CDH版本上安装，今天主要介绍的是在HDP版本上的安装。 版本 Impala对于Hadoop的版本要求很高，现在说明一下当前安装的版本信息 Impala 2.5 HDP 2.2.8.0 基于Hadoop2.6 安装步骤 1. 在/etc/yum.repo.d 中创建impala.repo [cloudera-cdh5] # Packages for Cloudera's Distribution for Hadoop, Version 5, on RedHat or CentOS 6 x86_64 name=Cloudera's Distribution for Hadoop, Version 5 baseurl=https://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/5/ gpgkey =https://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/RPM-GPG-KEY-cloudera gpgcheck
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