when exploring the best memory settings, especially vmstat-v. Figure 2 shows partial output of vmstat-v.
There are two types of pages in the memory: persistent pages (associated with the file system) and work storage or dynamic pages (including executable code and its workspace ). If you steal a persistent page, you do not need to swap it out unless the page has been modified (in this case, write it back to the file system ). If you steal the work storage page, you must first write it to the pa
hardware image is unavailable, you can easily create a software image.
Core asynchronous I/O: to implement core asynchronous I/O, no special settings are required, and no original or third-party file systems (such as Veritas Quick I/O) are required)
3. RAID level of common Oracle data files
SYSTEM and UNDO tablespaces are usually placed on RAID 1 volumes.
Online redo logs are usually placed on RAID 0 volumes.
Control files are usually placed on RAID
internet at night without too many people.The above-mentioned storage backup method of Das means that the backup storage is slow, the reliability is low and the applicable scale is smaller than the current enterprise storage System. Currently, it is mainly used in some small and medium enterprises.Now there is an improved LAN network data backup and recovery system. It is a more enterprise-oriented backup and recovery solution that overcomes some of the drawbacks of a dedicated tape scenario wi
ArticleDirectory
1 Backup Exec Installation
Technorati label: Be, Backup Exec, Veritas, backup 1 Backup Exec install 1.1 install Be Media Server
Select the installation type. In this case, local installation is used, as shown in figure
Environment check, such
License Management. Because it is a test and there is no license, Skip. For example
Component selection, as shown in figure
Default Login to be software users, such
SQL Serve
shared data. This is the problem to be solved by Io fencing.
I/O fencing can be implemented in two ways: hardware and software.:
Software: For storage devices that support the SCSI reserve/release command, use the SG command. A normal node uses the SCSI Reserve Command to "Lock" the storage device. When the faulty node finds that the storage device is locked, it knows that it has been driven out of the cluster, that is, it has encountered an exception, restart the instance to restore it to
this is completed during the installation of the software:SYS:\OPENV\NETBACK\BP. IniNovell Non-targetThe version is listed under ' Help ' in the main browser window.WindowsA version text file is located in the directory structure of the NetBackup software on the client. This file was located at the following path:It is also possible to obtain the version from the registry. Navigate to the following registry key::Hkey_local_machine\software\veritas\ne
Test the backup software of RedflagLinux-general Linux technology-Linux programming and kernel information. For details, refer to the following section. I. Test Environment
1. Backup server hardware platform
A. CPU
B. Memory
C. Hard Disk
2. backup client hardware platform
A. CPU
B. Memory
C. Hard Disk
3. Software Platform
A) Operating System
RedFlag DC4.1
Redhat AS4
Windows2003Enterprise Server
B) Domino database
Domino R6.5.3 English version
Domino R6.5.3 Chinese Language Pack
C) Backu
Serviceguard cluster is a network group composed of HP Integrity or HP 9000 servers (called nodes in the Serviceguard group). It has sufficient software and hardware redundancy. In this way, A single point of failure will not cause serious damage to the service. The Serviceguard cluster continues to run when a software or hardware failure occurs. Therefore, this type of cluster has high availability.
Configure as much redundancy as possible for hardware and software When configuring the Servic
db with HA or RAC architecture mode, Reader DB can be multi-set, through load balancing or business separation in the way, effectively share the pressure of reading library.For the Shared-nothing database schema mode, one of the core problems is the real-time synchronization of the read-write library, and while reader DB is only responsible for business queries, it does not mean that the database is functionally read-only. Read-only is from an application perspective, in order to ensure data co
Symantec's latest Norton Antivirus Norton Antivirus 2007, this version retains the advantage of the previous generation, the resource occupancy is greatly improved, the memory footprint is effectively controlled in the 10m-15m, the new background scanning function only takes up very small resources, Can be scanned at the same time does not affect you to do your own thing.
Norton 2007 Products Integrated Veritas VXMS Technology for the first time, grea
Appendix 2:windows Web Server Performance Optimization Tips
· Before you upgrade Windows 2000, you must dismount the Inoculan, PCAnywhere, and Veritas installations. You can install Windows 2000 again after you install it.
· Execute most of your applications with the new default medium protection mode (out-of-process of the buffer pool). When the application is in the buffer pool, they share the same program, thereby reducing the memory burden. and pe
You need to know the fact that disk I/O is an important reason to affect Oracle database performance. In essence, any Oracle database is responsible for storing data, and querying data from disk is a very expensive and time-consuming operation.
Because many Oracle systems require a large amount of I/O operations, many Oracle professionals consider using the raw device when they encounter large chunks (db_block_size) of data operations. A bare device is a disk that bypasses Unix's Journal filesy
As the web becomes more and more demanding on the performance of the system, the key to any system is how to ensure the performance of the system and can predict and locate the problem before performance problems occur. The system test before the system is on line and the performance monitoring of the whole system is the method to ensure the system to run with excellent performance.
At the end of last year, I wrote an article about how to use Jprobe to discover and locate the performance bottlen
prevent accidental occurrences when converting from an archive to a non-archived way.
III. Classification of Oracle Backups
The simple way of backup, can be divided into logical backup, cold backup (offline backup), hot backup (online backup), in fact, cold backup and hot backup can also be called physical backup
According to the Backup tool, it can be divided into Exp/imp backup, OS copy, RMAN, third party tools, such as Veritas
Here are a few w
time, and so on. These are usually more expensive tools and require some expertise to configure.
An example of a storage manager is the netbackup of Legato's Networker and Veritas company. Informix also comes with a storage manager whose engine is called Informix Storage Manager (ISM), which is essentially a scaled-down version of Legato's Networker. A small system with four or fewer tape drives that can be backed up with a minimum number of threads
what data is on the tape, assign the data to various categories, process retention time, and so on. These are usually more expensive tools and require some expertise to configure.
An example of a storage manager is the netbackup of Legato's Networker and Veritas company. Informix also comes with a storage manager whose engine is called Informix Storage Manager (ISM), which is essentially a scaled-down version of Legato's Networker. A small system wi
whole system.
Cost analysis, application effect and characteristics analysis
Although this nationwide bank card information Exchange System construction must put the system disaster caused by the social costs in the first place, but in the system design and implementation process, still can take some methods to reduce the system cost. In terms of its disaster backup system, from a cost-saving perspective, in the same city as the site than keeping a copy of the data rather than two to save sto
encapsulate 10TB storage into a DD690. Each device is designed with the maximum redundancy of power, NICs, Fibre Channel controllers, and RAID 6 disk arrays. We used two methods, the first is to use the Symantec Veritas netbackup software for local backup, and then use data domain replication technology in different data domain device replication between, the second method is to use data Domain OST to control all backup and replication processes for
appearing on the desktop or in the Start menu.
Assigned to computers: When a system administrator assigns software to a computer, the computer automatically downloads and installs it the next time it is started, and all users of those computers can execute the software. Except for users with the same privileges as the native system administrator, no one is allowed to delete the software, but users can still use the Add or Remove Programs in the control Panel to repair or reinstall the damaged
information about locking scenarios.
You can use the FLUSH tables with the read lock command to lock all tables in all databases with a read lock. View the Chapters 4.5.3 FLUSH syntax. If you have a file system that can create snapshots of files in time, such as Veritas, this will be a very convenient way to get backup.
Note: Lock tables are not transaction-safe and will automatically commit all active transactions before attempting to lock a table
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