file system

The Hadoop overall architecture is a distributed master/from architecture consisting of a set of daemons and a set of host programs, and daemons are: Namenode,datanode,secondary namenode,jobtracker,tasktracker The Namenode,datanode,secondary

My team has popularized the use of Codeanalyzer to analyze Code metrics (metric), sharing experience here. The first explanation is that Codeanalyzer is a jar file that you can run, and it can be used to get statistics on our code, and here is a

This article is also suitable for Oracle DBA and MySQL DBA Reading Bare devices apply to Linux and Windows In Oracle and MySQL is also supporting the bare devices!! Introduced Everybody sees this title must be confused, bare equipment?? A nude

In the final analysis, MySQL is running on the operating system of a software, it needs to use the file system to store data, this article mainly introduces the MySQL data directory organization structure. Location of the Data directory You can

MySQL is divided into logical and physical backups in the form of backup recovery A logical backup is a backup SQL statement that performs a backup of the SQL statement at the time of recovery to realize the recurrence of the database data

1.1. ORA-00845 Ora-00845:memory_target not supported Onthis system 00845, 00000, "Memory_target notsupported on this system" *cause:the memory_target parameter Wasnot supported on this operating system OR/DEV/SHM is not sized correctly Ux.

Today a brother's library ora-09925:unable to create audit trail file, then check df-h have free space, directory permissions are correct, not df-i view inodes use, Audit directory has nearly 24W files, Preliminary guess is because the audit

Fault classification one database suspend failure 1 Death of the database due to archive suspend 2 nit file in the SGA area set too large, resulting in insufficient memory, database and system are dead 3 The database was suspended because the

I. Overview 1, backup file system reason Backup files are one of the most important systems management features. Backups should be performed on a regular schedule to prevent data loss due to the following types of problems: (1) System crashes (2)

The ASM disk is an important part of the ASM architecture, and the ASM disk is positioned and managed by the ASM instance, which focuses on the ASM Disk group, the failure group, and so on. I. Related Concepts 1.ASM Disk Group ASM Storage

I. ASM-related concepts 1. What is ASM (Auto Storage Management) Abbreviation for automatic storage management, a tool for managing disks Ability to implement striped, mirrored data files, recovery files, etc. across multiple physical devices

In most cases, modifications to the primary database will be propagated to the physical standby database and applied without the need for additional operations on the physical standby side, except that, depending on the actual configuration, some

This article describes 8 commonly used monitoring data shell scripts. First, we reviewed some of the UNIX commands commonly used by DBAs, and explained how to execute the DBA script regularly with Unix cron. Online also has good Many similar

Today, I installed Oracle 10g on my computer and now I'm going to introduce my own installation process: Environment: Os:win Server mem:250m (haha is a little bit small, install when there are warnings ~) Db:oracle 10.2.0 1). You can go to

1. Check Hardware requirements The system must meet the following minimum hardware requirements: At least 1024MB of physical memory The following table describes the configuration relationship between physical memory (RAM) and swap area (swap

Tim Vincent: Hello, everyone. I've been doing DB2 research since 1991, the first is to do DB2 database research, this is my second time this year to Beijing, I have a lot of experience in DB2, today is very happy to have the opportunity to tell you

Content management is becoming more and more important in business. The ability to manage and deliver content quickly and efficiently is key to success for businesses competing on an on-demand service environment. Web content is playing an

Like other databases, the DB2®V8 XML Extender provides two models for storing and accessing XML: XML documents can be stored in CLOB columns as unresolved text, or mapped and decomposed into a set of relational tables. Both of these options have

Error Case: Create a tablespace with a size of 20G in the DB2 database of the AIX system, with the following specific SQL: create REGULAR TABLESPACE HTDC_DATA PAGESIZE 8 K MANAGED BY DATABASE USING ( FILE ’/db2_tag/TABLE_SPACES/HTDC_DATA/HTDC_DATA.

Motivation The SQL language provides the concept of a schema that is used to group all types of SQL objects. Schemas in the SQL language can be interpreted as directories in the file system. DB2 UDB for Linux, UNIX, and Windows well support the