] #/usr/sbin/oracleasm listdisks
DATA1
DATA2
DATA3
DATA5
DATA6
Later, you can use the GUI asmca to configure the ASM Disk Group.
5. Conclusion
According to the evolution of the recent versions of ASM, ASM will be the main system storage solution of Oracle for a long time. Oracle RAC is mainly based on ASM. It is very i
source code
Installing Oracle 11g R2 using RHEL6 ASM
Oracle 10g manual creation of the ASM Database
2. Advantages of ASM
Disk increase: it is very easy to add disks. No downtime is required and the file area is automatically reassigned.
I/O allocation: I/O is automatically distributed across all available Disks withou
errors that occur when manual maintenance tasks are executed. The naming of new data file files is not standardized, and the rest of the database is not supported. Each time the ASM instance starts the ASM or database, it will allocate a shared memory area named system global zone (SGA) and start the Oracle ASM and da
Occasionally a valid ANSI/ISO program may be incompatible with the extensions in gnu c. To deal with this situation, the compiler option-ansiDisables those GNU extensions which are in conflict with the ANSI/ISO standard. On systems using the gnu c library (glibc) It also disables extensions to the C standard library. This allows programs written for ANSI/iso c to be compiled without any unwanted effects from GNU extensions.
For example, here is a valid ANSI/iso c program which uses a variable ca
[Translated from mos] asmcmd command is used to copy the asm file between the local and remote asm instances. asmcmdasm
Use the asmcmd command to copy the asm file between the local and remote asm instances.
Reference Original:How to Copy asm files between remote
allocation: I/O is automatically distributed across all available Disks without manual intervention. This reduces the possibility of hot spots.3 Band Width: segments in the redo log file can be subdivided (K for faster transmission rate). For data files, the band width is slightly larger (MB, to transmit a large number of data blocks at a time ).4 Buffer: the ASM file system directly performs input/output
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
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
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
step with DBCADisk group, I think this should be a bug in DBCA, the manual creation of ASM type database should not have this limit.Disk, because the name of the ASM disk we created earlier is VOL1 to VOL4, so we use the * wildcard here, the preceding ' ORCL: ' notOtherwise, the ASM instance will not be able to check
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
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
-----------------------------------------------------------------------------Spfile string + SYS_DG/asm/asmparameterfile/registry.253.842510359SQL> select instance_name, host_name, version, status from v $ instance;
INSTANCE_NAME HOST_NAME VERSION STATUS-------------------------------------------------------------------------------------------------------------+ ASM myrac1.oracle.com 11.2.0.1.0 STARTED
SQL>
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
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
1. Place the Lrvine folder in the installation directory of Microsoft Visual Studio 9.0. Mine is D:\Program Files\Microsoft Visual Studio 9.0\irvine
2. Open the Microsoft Visual Studio 9.0\vc\vcprojects directory, join ASM Project.ico and ASM Project.vsz, open the Vc.vsdir file using Notepad, and add the following at the end of the file:
ASM project.vsz| {1b027
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
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
dynamic view. With this dynamic view, you can adjust the "power limit" clause to improve the balance operation. For example, if you want to measure the workload required to add a new ASM disk, you can use the following statement before manual and rebalancing:
SQL> EXPLAIN WORK FOR ALTERDISKGROUP DG_DATA ADD DISK data_005;
SQL> SELECT est_work FROMV $ ASM_ESTIMATE;
SQL> EXPLAIN WORK SET STATEMENT_ID = 'add
① ASM file conversionTake the created asmtest tablespace as an example.(I) convert OS files to ASM files
sys@ORCL> create tablespace asmtest datafile size 10m;Tablespace created.sys@ORCL> alter tablespace asmtest offline;Tablespace altered.[oracle@localhost ~]$ rman target /RMAN> backup as copy tablespace asmtest format '+DATA';RMAN> switch tablespace asmtest to copy;datafile 6 switched to datafile copy "+D
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