automatically back up business data from the server to these storage devices, Bacula is certainly the best choice because Bacula has media management capabilities, It makes it easy to save server data to one or more mounted tapes or libraries. Although commercial backup software can also complete the automatic backup of data to storage devices, but costly.
For users who are using a commercial backup software such as Legato and Veritas, you should tr
I. The concept and architecture of Rman
Recovery Manager (RMAN) is an Oracle tool for backup (Backup), restore (Restore), and recovery (recover) databases. Rman can only be used in ORACLE8 or higher versions. It can back up the entire database or database parts, such as tablespaces, data files, control files, archive files, and spfile parameter files. Rman also allows you to perform incremental block-level backups, and incremental Rman backups are time and space efficient because they only back
http://blog.csdn.net/zhouhx08/article/details/7528254
It is very important to develop database application and choose a good database. At present, the commercialized database management system takes the relational database as the leading product, the technology is more mature. Object-oriented database management system Although the technology is advanced, the database is easy to develop and maintain, but has not yet mature products. International and domestic leading relational database manage
balancing and scaling; MS SQL Server provides ha failover functionality, but no load balancing; The Sybase ASE 15 cluster is equivalent to the Oracle RAC function; Teradata itself is a distributed database platform; The MySQL cluster claims that the TPC-C performance benchmark is higher than the Oracle RAC; • IBM DB2/UDB works well on clusters of IBM P-series/power servers and Veritas Vcs/sun that run Aix HACMP (highly available cluster multi-process
Tags: oracle backup cleanup Script RmanI. BACKGROUNDFollowing the Oracle Backup Restore Practice (link address: http://kaliarch.blog.51cto.com/8966921/1978151), due to business growth, frequent backup restores have a greater space requirement for disk space, The basic 500G per week of disk, space usage will reach more than 85%, so write an Oracle cleanup script combined with Crond automatically clean up the Oracle archive log.Ii. Introduction of toolsRMAN (Recovery Manager) is an Oracle tool for
, including Mark Leslie, CEO of Veritas software company, Vinod Khosla (one of Sun's founders), Sun Senior investment in Silicon Valley, the CEO of the company. There is no doubt that today Db4objects is one of Silicon Valley's hottest innovators in technology.CharacteristicsDb4o's goal is to provide a powerful, fit-embedded database engine that can work on devices, mobile products, desktops, and servers in a variety of platforms. The main features ar
files, incorrect I/O controller ratios, stripe size and/or RAID level errors, and insufficient disk (that is, there are several high-capacity disks with multiple low-capacity disks). The DBA needs to see the average I/O time. A good database and I/O subsystem should provide an average I/O wait time of no more than 2 pct seconds.If this is a problem, the DBA should check I/O configuration by mapping I/O routes from the mount point to the Controller and controller to the Physical disk group and e
Subject:when attempting to expire a media in Veritas NetBackup (TM) 6.0 with the Bpexpdate command, the message "requested Media ID was not found in the EMM database ' is received reference:https://www.veritas.com/support/en_us/article.tech44823 1. Using Nbemmcmd to list media details is primarily the master server information [Email protected] admincmd]# Nbemmcmd-listmedia-mediaid DD1083Nbemmcmd, version:6.5.6=========================================
clustered environment, storage devices are shared. OS Kernel is designed for standalone, and can only control access between multiple processes on a single machine. If you also rely on OS Kernel services, you cannot guarantee coordination between multiple hosts. There is a need to introduce additional control mechanisms in the RAC, which is the clusterware between Oracle and OS Kernel, which intercepts the request before the OS Kernel and then negotiates with Clusterware on the other nodes to f
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