hbase

Set Multiple prefix row filter to scanner hbase java

由 感情迁移 提交于 2019-12-13 15:18:32
问题 I want to create one scanner that will give me result with 2 prefix filters For example I want all the rows that their key starts with the string "x" or start with the string "y". Currently I know to do it only with one prefix with the following way: scan.setRowPrefixFilter(prefixFiltet) 回答1: In this case you can't use the setRowPrefixFilter API, you have to use the more general setFilter API, something like: scan.setFilter( new FilterList( FilterList.Operator.MUST_PASS_ONE, new PrefixFilter(

Save CSV file to hbase table using Spark and Phoenix

由 瘦欲@ 提交于 2019-12-13 15:04:46
问题 Can someone point me to a working example of saving a csv file to Hbase table using Spark 2.2 Options that I tried and failed (Note: all of them work with Spark 1.6 for me) phoenix-spark hbase-spark it.nerdammer.bigdata : spark-hbase-connector_2.10 All of them finally after fixing everything give similar error to this Spark HBase Thanks 回答1: Add below parameters to your spark job- spark-submit \ --conf "spark.yarn.stagingDir=/somelocation" \ --conf "spark.hadoop.mapreduce.output

Hbase master not running

由 戏子无情 提交于 2019-12-13 15:03:42
问题 I am trying to run Hbase in a pseudo-distributed mode. I followed this link. I am using ubuntu version 12.04 Hbase version 0.94.8 Hadoop Version 2.4.0 In hbase/conf/hbase-env.sh, i added the following export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_25 export HBASE_REGIONSERVERS=/usr/lib/hbase/hbase-0.94.8/conf/regionservers export HBASE_MANAGES_ZK=true Then I set the HBASE_HOME path in bashrc file In hbase/conf/hbase-site.xml I added the following, <configuration> <property> <name>hbase.rootdir</name>

How does the use of startrow and stoprow not result in a full table scan in HBase?

由 萝らか妹 提交于 2019-12-13 14:08:05
问题 It is commonly suggested to use a range scan via startrow and stoprow as opposed to a Rowkey Prefix Filter (for example, here). The reasoning for this is because a Rowkey Prefix Filter results in a full table scan of the rowkey, whereas a range scan via startrow and stoprow do not result in a full table scan. Why doesn't it? Most people say "because the rowkey is stored in lexographical order," which of course, doesn't explain why the Rowkey Prefix Filter cannot leverage this. At anyrate, how

Hue集成Hbase

由 蹲街弑〆低调 提交于 2019-12-13 11:53:37
6.1．修改hbase配置 在hbase-site.xml配置文件中的添加如下内容，开启hbase thrift服务。 修改完成之后scp给其他机器上hbase安装包。 <property> <name>hbase.thrift.support.proxyuser</name> <value>true</value> </property> <property> <name>hbase.regionserver.thrift.http</name> <value>true</value> </property> <property> <name>hbase.thrift.support.proxyuser</name> <value>true</value> </property> <property> <name>hbase.regionserver.thrift.http</name> <value>true</value> </property> 6.2．修改hadoop配置 在core-site.xml中确保 HBase被授权代理，添加下面内容。 把修改之后的配置文件scp给其他机器和hbase安装包conf目录下。 <property> <name>hadoop.proxyuser.hbase.hosts</name> <value>*</value> <

Connect to HBase running in Docker

由 时光怂恿深爱的人放手 提交于 2019-12-13 11:41:43
问题 I cannot connect to HBase running in Docker on Windows (banno/hbase-standalone image). However, I can connect to locally installed HBase. banno/hbase-standalone image is run using: docker run -d -p 2181:2181 -p 60000:60000 -p 60010:60010 -p 60020:60020 -p 60030:60030 banno/hbase-standalone I also set up the port forwarding on the boot2docker-vm (which is required when running on Windows): I can successfully telnet to all those ports on my localhost. Next, here is a code sample that we use in

What is the difference between Hbase checkAndPut and checkAndMutate?

由 偶尔善良 提交于 2019-12-13 08:43:35
问题 In Hbase 1.2.4 What is the difference between checkAndPut and checkAndMutate? 回答1: checkAndPut - compares the value with the current value from the hbase according to the passed CompareOp. CompareOp=EQUALS Adds the value to the put object if expected value is equal. checkAndMutate - compares the value with the current value from the hbase according to the passed CompareOp.CompareOp=EQUALS Adds the value to the rowmutation object if expected value is equal. you can add multiple put and delete

Retrieving nth qualifier in hbase using java

由 不问归期 提交于 2019-12-13 08:31:44
问题 This question is quite out of box but i need it. In list(collection), we can retrieve the nth element in the list by list.get(i); similarly is there any method, in hbase, using java API, where i can get the nth qualifier given the row id and ColumnFamily name. NOTE: I have million qualifiers in single row in single columnFamily. 回答1: Sorry for being unresponsive. Busy with something important. Try this for right now : package org.myorg.hbasedemo; import java.io.IOException; import java.util

阿里巴巴HBase高可用

由 非 Y 不嫁゛ 提交于 2019-12-13 08:29:24
2011年毕玄和竹庄两位大神将HBase引入阿里技术体系，2014年接力棒转到东8区第一位HBase commiter天梧手中，多年来与淘宝、旺旺、菜鸟、支付宝、高德、大文娱、阿里妈妈等几乎全BU合作伙伴携手共进，支撑了双十一大屏、支付宝账单、支付宝风控、物流详情等核心业务。 2018年双十一，HBase全天处理请求2.4万亿行，单集群吞吐达到千万级别。从一个婴儿成长为青年，阿里HBase摔过很多次，甚至头破血流，我们在客户的信任之下幸运的成长，感激涕零。 2017年开始阿里HBase走向公有云，我们有计划的在逐步将阿里内部的高可用技术提供给外部客户，目前已经上线了同城主备，将作为我们后续高可用能力发展的一个基础平台。 本文分四个部分回顾阿里HBase在高可用方面的发展：大集群、MTTF&MTTR、容灾、极致体验，希望能给大家带来一些共鸣和思考。 大集群 一个业务一个集群在初期很简便，但随着业务增多会加重运维负担，更重要的是无法有效利用资源。 首先每一个集群都要有Zookeeper、Master、NameNode这三种角色，固定的消耗3台机器。其次有些业务重计算轻存储，有些业务重存储轻计算，分离模式无法削峰填谷。因此从2013年开始阿里HBase就走向了大集群模式，单集群节点规模达到700+。 隔离性是大集群的关键难题。保障A业务异常流量不会冲击到B业务，是非常重要的能力

SpringBoot学习：整合Hbase

由 血红的双手。 提交于 2019-12-13 07:43:14
所需pom依赖 < ! -- hbase依赖 -- > < hbase - client . version > 2.0 .0 < / hbase - client . version > < lombak . version > 1.16 .10 < / lombak . version > < dependency > < groupId > org . apache . hbase < / groupId > < artifactId > hbase - client < / artifactId > < version > $ { hbase - client . version } < / version > < ! -- 排除以下与springboot的冲突包，guava自己引入，故而排除。 -- > < exclusions > < exclusion > < groupId > org . apache . httpcomponents < / groupId > < artifactId > httpclient < / artifactId > < / exclusion > < exclusion > < groupId > org . slf4j < / groupId > < artifactId > slf4j - log4j12 < /
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