oracle asm failure groups

Install Oracle 11g R2 + RAC + ASM in Oracle Linux 6.4 I. Version descriptionMany articles related to the Internet are found, but they are not very specific. Therefore, the detailed version is used to make the article more practical.This is the RAC environment of Oracle 11g R2 11.2.0.4. The operating system version is

There is a friend in a storage space for ASM use, there is insufficient space, and then use another storage LUN to the ASM Data Disk group to increase ASM disk, run for about 1 days after the ASM disk group directly dismount, Database crash. And then you can't mount it properly. Several other disk

Free spacetable (FST)FST indicates the free space contained in the ATB. ASM generates a disk FST when the disk is selected for assignment. This allows ASM to skip the space occupied by the ATBs. FST contains entries for each ATB. Each entry describes the total number of extents size and the idle extents. The purpose of FST is to optimize allocation operations. In fact FST is located in Allocationtable. The

restrict which disks an instance can access. ASM Permissionsin Oracle 10G, access the ASM instance and Access standards database via Sqlplusinstance, you can access it with SYSDBA or sysoper permissions. However, note that it isbecause there is no data dictionary in the ASM instance, permission authentication is done

closedD: \ oracle \ asmdisk \ disk3 closed 6. Create an ASM disk group and create two disk groups. A. Create a disk group consisting of two M disks and adopt 2-way redundancy. SQL> Create diskgroup DG12 normal Redundancy3 failgroup dg1_0000 disk 'd: \ oracle \ asmdisk \ disk1'4 failgroup dg1_0001 disk 'd: \

of Oracle ASM host mirror.For the comparison of these two scenarios:VPLEXAsmThe two program authors participate in the most EMC scenarios, typically from program audits, installation,testing,go-live support, operations, optimization, and participation, while the ASM program is more involved in the overall crosscheck,trouble Shooting, optimize the adjustment and

In some scenarios, if there are problems with the host in the RAC environment, such as hardware failure, we need to store the startup database as soon as possible, and restore the business, then we need to migrate the previous RAC environment to the new host environment, I tested 11.2 and 12.1 of RAC, the recovery process is very fast, basically is the process of installing software, if the real scenario to restore business, there are two ways:1, foll

RAC Environment:Oracle Database: ORACLE11GR2Operating system: rhel6.4_x86_64Failure phenomena:1. The process and instance of Oracle associated with ASM for its one node fails to start;View method: Ps-ef|grep Ora_Ps-ef|grep Asm_CRSCTL Stat res-t (see only Oracle Instances and ASM instances launched on Node 1)2, the

directory exist. 2. cause of failure: 1. Intention to simulate Server failure 2. Directly restart two servers init 6. Fault symptom: 1. The asm instances of the two servers are not started successfully. 2. The oracle instances of the two servers are not started successfully. 3. processes such as Crs are started, but i

Oracle Video tutorial goals Oracle Video tutorial, wind Brother this set of Oracle Tutorial training to learn ASM fundamentals, Oracle Single and RAC ASM installation configuration instructions,

Label:Chapter II ASM INSTANCEthe type of ASM, for example, can be:The Oracle instance type adds an ASM category after 10g. The parameter instance_type=asm is set.ASM Instance startup command: StartupNomountLaunches the instance and background processes. But the disk group is

ASM concepts 1. what is Automatic Storage Management (ASM, it is a disk management tool that can implement strip, image data files, recovery files, and other files among multiple physical devices. The distribution unit is AUs (allocation units) the balance is distributed across all disks in the disk group. ASM uses the index technology to track the positions of e

facility failedOra-27300:os system dependent Operation:invalid_egid failed with status:1Ora-27301:os Failure Message:not OwnerOra-27302:failure occurred at:skgpwinit6ora-27303:additional Information:startup egid = 501 (oinstall), Current Egid = 503 (asmadmin)#修改Oracle进程权限, restore operations-bash-4.2# chmod 6755 Oracle