asm connects

ASM learning notes -- ASM 4 user guide Chapter 2 Key Points translation summary, asm -- asm Reference: ASM 4 user guide Part 1 core API Chapter 2 2.1.1 Overview The compiled classes include: L Description: includes the modifier (such as public or private), name, parent clas

About Oracle ASM instances About Oracle ASM disk groups About grouping and failure groups About Oracle ASM Disks About Oracle ASM files About Oracle ASM instances The Oracle ASM instance is built based on the same technology a

functions:With p, asmcmd will display the current path: rac2-> asmcmd-pASMCMD [+]> lsDG1/RECOVERDEST/ASMCMD [+]> cd DG1ASMCMD [+ DG1]> lsDEVDB/ASMCMD [+ DG1]> cd DEVDBASMCMD [+ DG1/DEVDB]> without p, the current path is not displayed: rac2-> asmcmdASMCMD> lsDG1/RECOVERDEST/ASMCMD> cd DG1ASMCMD> lsDEVDB/ASMCMD> cd DEVDBASMCMD> 4. For other related parameters, use help to view ASMCMD [+]> helpAsmcmd [-p] [command] The environment variables ORACLE_HOME and ORACLE_SID determineInstance to which the

Brief introductionOracle Real Application Cluster (RAC) is a well-known product in Oracle Solutions for maintaining high availability of business data. Oracle RAC allows sharing of load across all cluster nodes, using N-1 Fault tolerant configuration to address node failures, where N is the total number of nodes. Oracle RAC is continuously improving every version, and this is no exception. The new 12.1.0.1 edition contains the Flex ASM and flex cluste

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 The file is distributed across all disks in the disk group by allocation Unit AUS (allocation units), and ASM uses ind

In the ASM instance, all files stored in the ASM Disk group are inaccessible to the operating system commands and therefore cannot be manipulated using regular commands to manipulate the files on the ASM disk. Fortunately, we have asmcmd tools to do this work in lieu of operating system commands. The Asmcmd tool provides common commands similar to the operating s

-- ====================================== -- Create an ASM instance and an ASM Database -- ====================================== 1. concepts related to ASM 1. What is ASM (Auto Storage Management) Automatic Storage Management is a tool used to manage disks. Supports striping, mirror data files, and restore files betwe

I. ASM fast disk Resync Overview 1) when we take a disk offline in case the disk is already upted or database is not able to read or write from the disk. in case of Oracle Database 10 Gb, Oracle engine use to balance the other disks with the content of offline disk. this process was a relatively costly operation, and cocould take hours to complete, even if the disk failure was only a transient failure. 2) Oracle Database 11g introduces the

A friend came to me and said they had switched the previously stored to AIX direct-attached storage to a storage network with a fibre switch, and the RAC failed to start, allowing me to support it. The analysis was due to the incorrect start of the disk sequence after the change of link, and the maintenance staff set the Pvid on their ASM disk The disk group failed to mount properly so that the ASM disk of

Oracle ASM introduction and installation of Linux5.2 + Oracle10g + ASM Process 1) The reason for ASM (Automatic Storage Management: ASM is a new feature in Oracle 10g R2 to simplify the management of Oracle databases. It is a volume manager provided by Oracle itself and is mainly used to replace LVM provided by the ope

Linux Kernel series-embedded compilation of asm _ volatile __and asm _ volatile _ in C Language _ In Embedded Assembly, the C language expression can be specified as the operand of the assembly instruction, and you do not have to worry about how to read the value of the C language expression into which register, and how to write the calculation result back to the C variable, you only need to tell the progra

(I) management principles of ASM disk groups ① impact of disk addition or deletion When a disk is added or deleted from a disk group, ASM can automatically balance the disk.For normal delete operations (without the force option), the deleted disk will not be released immediately before the data on the disk is effectively processed.Similarly, when a new disk is added, the disk will not carry the I/O load bef

Applies: Oracle Server-Enterprise Edition-version: 10.2.0.1 to 11.1.0.6Information in this document applies to any platform.Goal This document describes the procedures for converting from Oracle ASM 10g single-instance to Oracle Real Application Clusters (RAC ).Solution To convert a single-instance node Using ASM to a RAC node Using ASM: 1) shut down the database

A problem occurred some time ago, that is, a data file in the RAC environment was put on a local hard disk instead of in the ASM disk group. It's a strange phenomenon. A problem occurred some time ago, that is, a data file in the RAC environment was put on a local hard disk instead of in the ASM disk group. It's a strange phenomenon. A problem occurred some time ago, that is, a data file in the RAC env

There are some basic concepts about ASM in the previous section, such as: The first class version in visit, the description of the method, the description of the reference, etc., which are described below.Class version A Java binary class file that has a version that corresponds to a different JDK version. Therefore, ASM provides several constants to specify the version of a class, which are defined in the

Adhu (ASM Disk Header Utility) is one of the three major restoration artifacts of oracle asm, kfed, and amdu, which are not vigorously promoted by oracle (an internal tool ), with the enhancement of the kfed function and the improvement of the automatic backup function of asm disk headers, adhu oracle basically stops development support and can be used as a disk

This test copies the dual-node RAC deployed on ASM to the ASM of a single instance. This test is also based on the needs of a project. The drill operations on the virtual machine are hereby recorded. Previously This test copies the dual-node RAC deployed on ASM to the ASM of a single instance. This test is also based o

oracle10g R2 "Rac+asm→rac+asm"Environment used in this demo case: RAC+ASM+OMF Primary Standby OS Hostname Node1,node2 Dgnode1,dgnode2 OS Version RHEL5.8 RHEL5.8 DB Version 10.2.0.5 10.2.0.5 Db_name Stephen Stephen Db_unique_name

Today, this error occurred while compiling the kernel: (2.6.30.4) Make:Warning:File ' include/config/auto.conf.cmd ' has modification time 3.5e+02 s in the futureCHK Include/linux/version.hMAKE[1]: Warning:file ' include/config/auto.conf ' has modification time 3.6e+02 s in the futureMAKE[1]: ' Include/asm-arm/mach-types.h ' is up to date.MAKE[1]: Warning:clock skew detected. Your build is incomplete.CHK include/linux/utsrelease.hSYMLINK include/

Use RMAN to copy RAC + ASM to a single instance + ASM This test copies the dual-node RAC deployed on ASM to the ASM of a single instance. This test is also based on the needs of a project. The drill operations on the virtual machine are hereby recorded. We have already performed multiple RMAN Database Replication times