Backup | Data storage Backup technology generally includes hardware technology and software technology, hardware technology is mainly tape drive technology, software technology is mainly general-purpose and special backup software technology.
Tape Drive Technology:
In hadoop2.0, there are two methods to select a disk for storing datanode data copies:
The first method follows the disk directory round-robin method of hadoop1.0. Implementation class: roundrobinvolumechoosingpolicy. Java
The second method is to select a disk with sufficient available space for storage. Implementation class: availablespacevolumechoosingpolicy. Java
The configuration items correspondi
Greenplum metadata errors can also affect the data backup process, and the workaround for this error is described in this article when a backup of a data structure using PG_DUMP results in a backup failure due to a lack of distribution policy.PhenomenonWhen you use the Pg_du
Author: Zhongguancun online Zhang Qi
Once upon a time, the NTFS partition format made Ghost a little helpless, but the latest Ghost already supports NTFS partitions, but in Windows Vista, it is very troublesome to back up and restore the system only by using the Vista installation disc or the Ghost tool of the optical disk. We will discuss different Vista system backup and restoration technologies to open up more System Security ideas.
1. Vista clone
The backup service of Android allows you to copy persistent application data to remote "Cloud" storage, so as to provide a restore point for application data and settings. If you restore the factory settings or convert the application to a new Android device, the system automatically restores the
, with FC fiber interface, it is best to have Ethernet interface, can provide Fc-san, Ip-san and even Nas and many other access methods, and depending on their actual situation, flexible choice of access mode.
The scheme is a redundant link architecture, 2 servers have been hot standby through the backbone and 2 minicomputer connected together, and 2 minicomputer through the Fibre Channel switch connected to the primary storage, that is, FC San archi
Very early like on such a set of data backup system, daily use of the original software backup and manual backup method, there are always some not too convenient place.Coupled with the expansion of enterprise scale, the system increased, business data is also important. No i
Original: 100 Cluster Storage Systems and real-time data backup, real-time Cluster
Server description Internet IP (NAT) Intranet IP (NAT) Host NameApache web Server 10.0.0.7/24 172.16.1.7/24 web02Nginx web Server 10.0.0.8/24 172.16.1.8/24 web01NFS storage server 10.0.0.31/24 172.16.1.31/24 nfs01Rsync
Whether in the electronic government-led city, or in the education of the city of information, storage demand is showing a diversified development pattern. After years of construction. E-government in China has been developing from the initial stage of information release to a deeper level of interaction between enterprise, citizen and government. To this end, all levels of government, especially the provincial and municipal level two governments, wil
restore the backup file to the device:ADB restore Newbackup.ab得到如下信息：In the case of the root of the phone we can go directly to the application's path to view the shared preferences file.In the case of no root, you can view it by backing up the data to the local computer again.You can see that the file has been modified:What should we do to protect our applications?If sensitive information is present in yo
Backup table data today encountered an error code:1197 multi-statement TRANSACTION required more THAN ' max_binlog_cache_size ' bytes of STORAGEVersion: mysql5.6.35System: centos6.5Here is the BACKUP statementCREATE TABLE as SELECT * from1197 Multi - TRANSACTION ' max_binlog_cache_size ' of and try AgainInternet search, found that the max_binlog_cache_size se
database, because HTML doesn't provide support for a lot of content.In addition, it is also very important that XML is extensible, that all tags and document structures in HTML are predefined, that we must use those standard HTML flags, and that XML allows us to customize our own logos and our own document structure.How to store and back up data in XMLIn fact, through the previous introduction, I believe you should understand why the use of XML for
location 4. Start the MySQL service using the command line Navica database file in C:\Documents and Settings\All Users\Application Data\mysql\mysql Server 5.1\data By default, the application Data folder is a hidden property, so that it can be displayed to see the files under it. How to: Tools--Folder Options--View---Hidden files and folders below the show all
Due to the data structure of MongoDB, data storage space is much occupied compared with traditional relational databases.
The hard disk space utilization is not negligible for storing infrequently used backup data.
Take MYSQL as an example. Remember to check others' test r
I sorted out the tuscany.org.cn server and found that the script I wrote three years ago was still running.
The script is as follows:
#! /Bin/bashCurrent_date = 'date + % Y-% m-% d: % H: % m: % s'
/Usr/local/MySQL/bin/mysqldump-prootpass dbname1>./db_dir/dbname1 _ "$ current_date" _ dump_file. SQL/Usr/local/MySQL/bin/mysqldump-prootpass dbname2>./db_dir/dbname2 _ "$ current_date" _ dump_file. SQL
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