hive active

In the previous section we have a general understanding of the basic concept of active objects, to use the active object mechanism, we need to use the active object, active scheduler, asynchronous functions. We want to use asynchronous functions, which are used in accordance with the process of the application-> activi

In the last blog post we described how to deploy additional domain controllers in a domain, and the additional domain controllers have many benefits, such as balancing user access to AD, and helping to avoid domain crashes caused by a single domain controller corruption. As we learned from the previous blog, all domain controllers in the domain have an Active Directory with the same content, and Active Dire

Hive has been used for a while, but no related logs have been written, because hive is mainly used in the create table, upload data, and crud processes. Later, I needed some frequently used methods in my work. I learned that hive supports UDF (user define function). I have read some articles and found that UDF writing is also very simple, inherit the UDF and over

The hive Tool that reads and computes data from any hive single table and writes data to any mysql Single table. In the hive-based data warehouse, each dimension has many hierarchical concepts, it is important to configure and Display dimensions and metrics online and offline in mysql. This hive Tool is suitable for an

detect (probe) the Hashtable of small table in the map stage. If join key is equal, it is written to HDFs.The map join is called a map join because all of its work is computed on the map side.Hive has made several optimizations on the map join:In hive 0.6, the default is that a large table is behind a select, a small table in front, or a/*+mapjoin (map_table) */hint to set it. In hive 0.7, this calculation

Hive Concurrency Model Hive Concurrency Model Use Cases Turn Off Concurrency Debugging Configuration Locking in Hive transactions Use CasesConcurrency Support (http://issues.apache.org/jira/browse/HIVE-1293) was a must in databases and their use cases be well u Nders

When you have a need to do all kinds of statistics from a hive table, then fall into the statistical tables of each category to store. Naturally we would think of using the Hive Multi Insert statement to implement it. Because you can avoid multiple scans of the same original table data by using the Multi Insert statement. This document records the GC overhead limit exceeded problem that occurs once using th

Tags: hive load install step INF blog Apach info share picture RAMFirst, install the Dbvisualizerhttp://www.dbvis.com/ You can also download the cracked version of the program from the Internet, the version used here is Dbvisualizer 9.1.1 Specific installation steps can be Baidu, or modify the installation directory after the default installation can beConfigure hive JDBC 1 in the Dbvisualizer, create a new

In the previous blog we deployed additional domain controllers in the domain, and we already know that each domain controller has an Active Directory database with the same content, and today we are going to discuss the replication topology used by the additional domain controller for Active Directory replication. In the NT4 era, domain controllers are divided into two categories, the PDC and the BDC. The

Hive Startup times the following error message [Root@master bin]# Hive Missing Hive execution Jar:/data0/hive/hive1.2.1/lib/hive-exec-*.jar Solve: 1. Check/etc/profile file configuration $HIVE _home configuration is correct

Tags: lazy expand lib Access time info version MySQL database blog artOverviewThe metadata information of Hive is usually stored in the relational database, and the common MySQL database is managed as a meta-database. The previous installation of Hive also stores metadata information in the MySQL database.Hive metadata information has 57 tables in MySQL dataOne, the metadata table (version) that stores the

First, the preparation before the installation Prerequisites for installing the Active Directory: 1, select the operating system: in Windows Server 2003, in addition to the web version of the unsupported Active Directory, the other standard version, Enterprise version, Datacenter version support the Active Directory. We are in this section of the Enterprise ver

1.remote IntegratedThis type of storage requires running a MySQL server on the remote server , and the meta service needs to be started on the Hive server . here with mysql test server,IP bit 192.168.1.214, new hive_ Remote database, character set bit latine1;$ vim Hive-site.xmlConfiguration> Property>name>Hive.metastore.warehouse.dirname>value>/user/hive/wareho

Continued open-e DSS V7 application series of eight remote access and administrator password recoveryI. Definition and classification of clustersA cluster is a parallel or distributed system consisting of a number of interconnected computers, from the outside, they are simply a system that provides a unified service to the outside. High availability is one of its distinguishing features.Cluster-by-platform providers can classify OS platform providers, database platform providers, application ser

I have already set up the hadoop and hive environments, created a table page in hive, and loaded the data in. Now I want to count the traffic of each URL from this table and put it in another relational database or display it on the page. What should I do? Go to the official website and check whether Java, Python, and PHP can be used for implementation. The following is a simple script written in Python. F

Install hive and hive Hive installation is relatively simple, because there is no need to modify too many configuration files 1. Download and decompress I put it in/usr/hadoop/hive 2. Set the environment variable. (It seems that it is not set) vim /etc/profileexport JAVA_HOME=/usr/java/jdk8export HADOOP_HOME=/usr/

viii. Query Statement select for hive In all database systems, the SELECT statement is the most used, but also the most complex piece, the query in hive Select support syntax is certainly more complex, this article only try to introduce. 8.1 Basic Query Syntax The Select base syntax in hive is basically consistent with the standard SQL syntax, which supports whe

Emergence of active defense In recent years, people have evolved from medical treatment to regular health check and prevention. The concept of security threat defense in the information security field is also changing. "Pattern" identifies viruses as the main technical means of anti-virus software, but this method can only serve as a final solution-only after a piece of code has been compiled can we determine whether the code is virus, to detect or cl

Label: Style Color Io ar SP file on problem log Logs record the process of running the program and are a powerful tool for finding problems. There are two types of logs in hive: 1. the system log records the hive running status and error status. 2. The job log records the historical execution process of jobs in hive. Where are system logs stored? The storage

Http://web.cse.ohio-state.edu/hpcs/WWW/HTML/publications/papers/TR-14-2.pdf(Auxiliary reference: Https://cwiki.apache.org/confluence/display/Hive/Correlation+Optimizer) IntroductionPrimary deficiencies of hive: storage and query plan execution. Three main improvement points are proposed in this paper. New file Format ORC Query plan component Optimization (Association optimizer correlati