asm manual

Tags: asm grid Oracle  First, the installation needs to know:1, database version and grid version number to be consistent2, the grid version is lower than the Oracle version, you need to upgrade the grid version, or DBCA failure.3, this experiment uses oracle11.2.0.3.04, the experiment was first adopted grid[11.2.0.1.0], and finally upgraded to grid[11.2.0.3.0]5, the system uses the Linux red5,linux6 do not use, 6 does not support asmlib kernel.2nd,

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

downtime is required and the file area is automatically reassigned. I/O allocation: I/O is automatically distributed across all available Disks without manual intervention. This reduces the possibility of hot spots. 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 ). Buffer: the

(ASM Automatic Storage Management) is a data file storage mechanism dedicated to Oracle database services. By managing data files through ASM, DBAs no longer have to worry about I/O performance issues, you do not need to know the file name. At the same time, ASM also provides integration from the file system to the volume manager.I. Features of ASM1) automaticall

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

I/O system call interface ). ASM is implemented and deployed as a separate Oracle instance. It only needs to have a parameter file and can start the ASM instance without any other physical files. Only when it is running, to be accessed by other data. On the Linux platform, you can access ASM only when you run the OCSSD service (which is installed by default by t

. idle> alter diskgroup DATA drop disk data007;Diskgroup altered.idle> alter diskgroup data undrop disks;Diskgroup altered. As long as the deletion operation has not been completed, any operation will be canceled. Otherwise, the disk can only be re-added to the disk through the add statement. Ⅲ modify disk size The disk size in ASM can be expanded or reduced,To expand, make sure that the raw volume corresponding to the disk does have enough space to

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

.564.83111783556 6244 NEUDOC_DRTBS *** + DATA_NMGT/nmggt/datafile/neudoc_drtbs.565.83111784157 3172 UNIEAP_DRTBS *** + DATA_NMGT/nmggt/datafile/unieap_drtbs.566.83111784158 4196 ELARP_DRTBS *** + DATA_NMGT/nmggt/datafile/elarp_drtbs.567.83111784159 100 NMGADMIN_GTTBS *** + DATA_NMGT/nmggt/datafile/nmgadmin_gttbs.568.83111936360 100 GTDZ_GTTBS *** + DATA_NMGT/nmggt/datafile/gtdz_gttbs.569.83111936361 100 GTKZ_GTTBS *** + DATA_NMGT/nmggt/datafile/gtkz_gttbs.570.83111936562 100 SDE_GTTBS *** + DATA

disk number:1 and timestamp (33005975-1778129920)Checking if the diskgroup is mounted or used by CSSChecking Disk Number:2Checking Disk Number:3Checking Disk number:0Checking Disk Number:1Generating configuration file.Completed Phase 1Executing Phase 2Looking for/dev/asm-fra03Modifying the headerLooking for/dev/asm-fra04Modifying the headerLooking for/dev/asm-fr

I. Features of ASM1. automatically adjust the I/O LoadASM can automatically adjust the I/O load in all available disks, which not only avoids manual I/O adjustment, but also optimizes the performance, with ASM, you can increase the database size online without shutting down the database.2. Band-based storageASM divides files into multiple allocation units (allocation units) for storage, and allocates the AU

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

, third-party RAID works at the volume level and uses the uniform strip size. ASM can work at the file level, and different files can use different strip sizes. Another spfile setting error causes the database to fail to start. Pfile parameter of Oracle oradim How to copy data files in ASM to the Operating System Restoration After all Oracle 11g rac asm disks are

size as the disk within the FG2, otherwise the minimum disk space will be used as a space for use. We cannot delete the disk group directly, and when the last disk in the fault group is deleted, the fault group is deleted. ASM supports hot-swappable disks, and when we add a disk to a disk group, ASM automatically pulls a portion of AU from each disk in the disk group, writes the newly added disk, makes al