I. Environment Description RHEL 6.6 + Oracle 11.2.0.4 storage replacement, need to add a new disk, replace the old storage disk, the following is the test steps. II. test process [[[emailprotected] ~]# cd/etc/udev[[emailprotected] udev]# lsmakedev.d rules.d udev.conf[[email protected] udev]# CD rules.d/[[emailprotected] rules.d]# ls55-usm.rules 60-pcmcia.rules 70- Persistent-net.rules 98-kexec.rules60-fprint-autosuspend.rules 60-raw.rules 90-alsa.rules 99- Oracle-asmdevices.rules60-openct.rules
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Summarize the process of creating an ASM disk.This experiment is based on the CentOS 4.6 system,
1. First, I need to download some ASM lib packages on the Oracle website.Http://www.oracle.com/technology/tech/linux/asmlib/install.htmlBecause the experiment environment is based on Linux and rhel as 4, three packages will be downloaded based on the current kernel
Asm creates and deletes disks, disk groups, and rebalance operations, and asmrebalance
[grid@lzl1 ~]$ sqlplus / as sysasmSQL*Plus: Release 11.2.0.3.0 Production on Fri Oct 20 15:20:44 2017Copyright (c) 1982, 2011, Oracle. All rights reserved.Connected to:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit ProductionWith the Real Application Clusters and Automatic Storage Management optionsSQL>
Existing Disk
SQL> select name,free_mb
[Translated from mos] The asm background process in 11gR2, 11gr2asmAsm background process in 11gR2Reference Original:ASM Background Processes in 11.2 (Doc ID 1641678.1)Applicable:Oracle Database-Enterprise Edition-Version 11.2.0.2 to 11.2.0.4 [Release 11.2]Information in this document applies to any platform.1 ASMB-ASM Background ProcessCommunicates with the asm
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
This article consists of four parts: 1. Create a virtual ASM disk, 2. Create a database on the virtual ASM disk, 3. asmcmd tool, and 4. Add a disk for the disk group.
Part 1: create a virtual ASM Disk(In this example, Oracle is installed on D: \ oracle \ product \ 10.2.0)
1. Use asmtool provided by Oracle to create an ASM
1. Format of Embedded Assembly Language
C ++ is a superset of C language. It is an object-oriented programming language based on C language. Microsoft Visual C ++ 5.0/6.0 is a widely used development system on Windows. x platform. This section uses Visual C ++ 5.0/6.0 as an example to describe the hybrid programming of assembly language and C ++ in a 32-bit Windows 9. x environment. It is also divided into two methods: Embedded Assembly and module call.
Visual c ++ directly supports the embedded
The 11g asm disk cannot be automatically mounted.
I started ASM today and found that only one SYS_DG DISK is mounted (used to store OCR and VOTING DISK information). The other two DISK groups DATA_DG and DG_FRA do not mount.Environment: OS = RHEL 6 DB = Oracle11GR2
[Grid @ myrac1 ~] $ Crs_stat-tName Type Target State Host------------------------------------------------------------Ora. DATA_DG.dg ora... up.
Overview In a truly massive database environment, DBAs may spend a lot of time doing disk management, such as a table space will fill the entire magnetic disk, the DBA will need to add another disk to the operating system, and then create a new data file on the new disk, if it is a single disk this is not very cumbersome, the problem is that if we used raid or LVM, then the large amount of data is still distributed on the previous those disks, if we want to distribute the data evenly on th
Currently, ASM instances are widely used in both rac and single-instance database environments. This article mainly introduces the management of ASM instances in Oracle 11.2.0.3, including the following:1: view the status of the ASM disk and disk group2: Create an external redundant disk group, add or delete a disk.3: Create a normal redundancy disk group4: failg
Create an external disk group DATA12. Backup disk header[Root @ asm] # dd if =/dev/asm-diskf of =/asm/diskf1.bak bs = 1 M count = 100100 + 0 records in100 + 0 records out104857600 bytes (105 MB) copied, 3.71699 seconds, 28.2 MB/s3. Clear the disk header[Root @ asm] # dd if =/dev/zero of =/dev/
Tags: style c a width strong fileASM Single point of failureIt is often the user's best practice to ask how to avoid an ASM single point of failure. As with other file systems or volume managers, the failure of an ASM instance can cause the RDBMS instance running above to be unavailable. However, OS file system or volume manager failure typically accompanies operating system crashes, and
New feature 3 of Oracle12c -- ASM Grid
1. Enhancements to Automatic Storage Management (ASM)
1.1. Flex ASM
In a typical Grid Architecture Installation, each node has its own ASM instance running and plays the role of the database storage container on the node. This installation configuration has the risk of single poi
Asm disk Group loading ORA-15183 error example
In Oracle 11gR2, ASM (Automatic Storage Management) is removed from the Database Component, and as an independent Component, it enters the scope of Grid Management.
This article mainly introduces a problem that occurs during the database startup and loading process. There are some differences with the policies recommended by the official MOS. Record it and keep
Tags: oracle12c asm grid new features features1. Enhancements to automated storage management (ASM) 1.1. Flex ASM in a typical grid-architecture installation, each node has its own ASM instance running and acting as a storage container for the database on that node, with the risk of a single point of failure for this
First, ASM (Automated storage Management): ASM is a new feature of Oracle 10g R2 to simplify the management of Oracle databases, a volume manager delivered by Oracle itself, primarily to replace the LVM provided by the operating system. Not only does it support single instances, but it also supports the RAC very well. ASM can automate the management of disk gro
Tags: large number of change values port Goup Note repair level assignment Use ASM to deploy large databases (10TB to PB Range) References:Deployment of very large databases (10TB to PB Range) with Automatic Storage Management (ASM) (Doc ID 368055.1) Range:This article applies to ASM configurations on all platforms. Contains the use of RAC and single-instance env
Tags: Oracle database operating system ASM ASM installation ASM ConfigurationASM Installation of Oracle InstallationThe last time we talked about building an Oracle environment, let's look at the installation of ASM automated storage Management in Oracle and the creation of ASM
Tags: point bin socket list option href rom Lex efiUDEV SCSI Rules Configuration for ASM in Oracle Linux 5 and 6For Oracle Automatic Storage Manager (ASM) to use disks, it needs to is able to identify the devices consistently and for them to the correct ownership and permissions. In Linux you can use Asmlib to manage these tasks, but it's seen as an additional layer of complexity and have never reall Y gain
For the asm background process in 11gR2, see the original article: ASMBackgroundProcessesin11.2 (DocID1641678.1) for: OracleDatabase
For the asm Background process in 11gR2, see the original article: ASM Background Processes in 11.2 (Doc ID 1641678.1) applicable: oracle Database-Enterprise Edition-Version 11.2.0.2 to 11.2.0.4 [Release 11.2] Information in this do
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