oracle asm failure groups

Oracle 11g + RAC + RHEL6.5 + udev + ASM + PSU Installation Summary 1. Preparations before installation: Operating System: RHEL6.5 Storage: Huawei, multi-path configured Bind the business network card and heartbeat network card and pass the redundancy test. YUM source configuration BASH/SSL vulnerability patches 2. Check System Requirements A. LINUX version Cat/etc/issue B. Memory (at least 1 GB) Grep

+= "/bin/raw/dev/raw/raw1%N"# to BIND/DEV/RAW/RAW1 TO/DEV/SDA, or# action== "Add", env{major}== "8", env{minor}== "1", run+= "/bin/raw/dev/raw/raw5%M%M"# to BIND/DEV/RAW/RAW5 to the device with major 8, minor 1.action== "Add", kernel== "Sdh1", run+= "/bin/raw/dev/raw/raw4%N"action== "Add", kernel== "Sdi1", run+= "/bin/raw/dev/raw/raw5%N"kernel== "raw[4-5]", owner= "Oracle", group= "Oinstall", mode= "660 "Restart Service/sbin/start_udevView:[Email prot

The steps to install the ASM database are much more repetitive than the steps to install RAC, so the installation documentation for the previous RAC has been modified to successfully install the ASM-managed database. The installed environment is the centos6.5_64 bit, and the database to be installed is the 11GR2 version.The steps to install are as follows:1. Create operating system

is, and the smaller the impact on system performance. Redundancy generally selects external, that is, it does not consider Redundancy. If normal is selected, it is mirror. At least one FailGroup must be set to High, which is triple mirror. Three times the image, three failgroups are required, the FailGroup actually divides the disk of the disk group into several groups and mirrors each other. In addition, discoverString is generally ORCL :*. Next, db

Starting with Oracle 11GR2, GI integrated Asm,ocr/votedisk is also housed in ASM disk groups (11GR2 previously needed to be stored in bare devices), and ASM has a much greater capability than 10g.Let's first introduce a problem: in 11gr2, Ocr/votedisk is stored in

Oracle provides a tool for manual query of ASM disk information-kfod. First, let's look at the help information: Db1-> kfod-help_ Asm_a/llow_only_raw_disks KFOD allow only raw devices [_ asm_allow_only_raw_disks = TRUE/(FALSE)]_ Asm_l/ibraries ASM Libraries [_ asm_libraries = lib1, lib2,...]_ Asms/id ASM Instance [_ as

Most of the time, because ASM does not start properly, data loss is caused. Here are two ways to retrieve data files from ASM I. Using the AMDU tool Amdu is a free tool in Oracle 11g that analyzes the metadata of the ASM Disk group and extracts data files from a disk group that cannot be mount "note:553639.1 placehol

I/O operation to a disk failedFrom the preceding logs, we can see that the database node reported an error starting from on the 25 th, which may be due to some session hung, followed by a write failure operation. The write failure is 35th disks.Of course, this is only a warning, so we cannot determine whether the disk is faulty.Later, we learned from the customer that the storage link encountered exception

The role, benefits, and disadvantages of ASM storage are not described here. There are many documents related to google! This article mainly records how to use the ASM storage in Oracle 11.2.0.3! Related software packages can be found inHttp://support.oracle.comDownload the patches on the website. You only need to download the first three patches in 11.2.0.3. In