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Comments: The use of MongoDB still needs to focus on design, or even higher user requirements, rather than the opposite; MongoDB protocol problems, this may not be simple redis during c ++ code integration; however, the MongoDB communication

In the middle of the night, I was bored with writing a PHP form test. After writing the code, I started the test and found that I couldn't submit it. After reading it for a long time, I didn't find the problem. Later I saw that I set the ID of a

Directory structure: Hadoop cluster (CDH4) practices (0) preface Hadoop cluster (CDH4) Practices (1) Hadoop (HDFS) Build Hadoop cluster (CDH4) practices (2) build Hadoop cluster (CDH4) using HBaseZookeeper (3) Build Hadoop cluster (CHD4) using Hive (

We have been using Redmine for project management and system defect tracking. recently, the center developed a platform and introduced the telephone system, all of which are from SQLSERVER. To integrate with the two systems, the Redmine was changed

The problem occurred when installing Oracle10G. Later, I asked my roommates to re-send an Oralce10g Client installation package and install it. It was possible to use PLSQL at the beginning. Later, due to work needs, an Oracle database backup was

If you need to regularly execute a stored procedure or SQL statements of less than 3200 characters in SQLServer, you can use SQLServer proxy-job. 1. Manage-SQLServer proxy-job (right-click)-create job-2. Create job properties (General) -Name

There are many ways to view the SQL Execution Plan. 10046 events are one of them. different from other SQL Execution plans, when we encounter complicated SQL statements, we can track SQL statements through 10046 to obtain the logical reads of each

The following environments are representative of the general configuration and work environment of small and medium-sized enterprises. I hope this article will help you understand the MySQL database performance tuning method in Linux. 51CTO

When CentOS6.5 is installed with PostgreSQL9.3.5, the following error occurs: jade: Commandnotfound. When installing PostgreSQL9.3.5 on CentOS 6.5, the following error occurs: jade: Command not found. When installing PostgreSQL9.3.5 on CentOS 6.

Similar to most Linux applications, the correct use of MHA depends on a reasonable configuration file. The configuration file of MHA is similar to that of mysql's my. cnf file. Similar to most Linux applications, the correct use of MHA depends on a

Next, let's take a look at what direct paths are and the advantages and restrictions of using direct paths. The article is taken from "Oracle? DatabaseAdministratorsGuide11gRelease2 (11.2) "(of course, the Chinese annotation is not in the official

Author: Qing Jun original address: blog. csdn. netqingdujunarticledetails36426825sqlserver2008 + VS2010 code written in C #. When restoring the database, an error occurs: error message: a transmission-level error occurs when sending a request to the

The software restored data from incomplete backups of a large state-owned enterprise in southwest China. The ASM of a large enterprise database in Southwest China was accidentally damaged due to disk addition. The user re-built the ASMDISKGROUP and

Some time ago, we did a SPA test. Our environment was 11.2.0.4.2. After the previous analysis, an error occurred while generating the SPA report. Outofmemory is reported. The error log is as follows:

Background: This is a windows rac system. Database background log reporting ORA-00474: SMONprocessterminatedwitherror. Then reported ORA-00603, ORA-27501, ORA-27300, ORA-27301, ORA-27302 and other errors. Problem Analysis: 1. Database alert Log

The last article (Zabbix distributed Server monitoring system installation and deployment (I) records the installation and deployment of the entire Zabbix System, including the Server and client segments, this article mainly describes how to install

(Original article: ScalingtheFacebookdatawarehouseto300PB ?, This article is translated from the original article. Facebook's challenges in storage scalability in data warehouses are unique. Our Hive-based data warehouse stores more than Pb of data

The analysis optimizes Hadoop from the Administrator's perspective, and the Administrator is responsible for providing an efficient running environment for user jobs. The administrator needs to adjust some key parameter values globally to improve

VM is a new feature of Redis2.0. Before there is no VM, redis will put all the data in the db in the memory. As redis continues to run, the memory used will increase. At the same time, the client accesses some data more frequently than other data.

It is very basic to add or delete a primary key in mysql. The following describes how to add or delete a primary key in mysql. If you are a new user of mysql database, take a look. Modify the mysql Character Set: You can set the mysql character set