mongodb maintenance

MongoDB cluster technology: replica set sharding, mongodb ClusterA MongoDB replica set is a process of synchronizing data to multiple servers. The replica set provides redundant backup of data and stores data copies on multiple servers, this improves data availability, ensures data security, and allows data recovery from hardware faults and service interruptions

Introduction and creating a database The default enable automatic collection of statistics features IBM's DB2 V9 introduces automatic maintenance, automatic database backup, automatic statistics update, and reorganization of tables and indexes when necessary. DB2 V9 has an automated backup feature that provides users with a solution that helps users ensure that their databases are regularly backed up without worrying about when to back up, or having

MongoDB Concept Analysis No matter what database we learn, we should learn the basic concepts, the basic concept in MongoDB is the document, the collection, the database, we introduce each one. The following table will help you to understand some of the concepts in MONGO more easily: SQL Terminology/Concepts MongoDB Terminology/Concepts Inter

field names in one byte, so you don't have to worry about how long the field name takes. But the author's concern is not unreasonable, this index method needs to be a result of each query to replace the index value with the original value, and then send to the client, this substitution is also very time-consuming. Now the realization is to take the space to exchange time. 3, delete the record does not free space: This is easy to understand, in order to avoid the record deleted after the large-s

About five or six years ago, for the first time, it was a nosql that was already hot topic. But at that time the use of mysql,nosql for me is still new things, and not really use, just unknown. But the impression is such a picture (later Google to the picture from here):650) this.width=650; "Src=" http://images2015.cnblogs.com/blog/1089769/201705/ 1089769-20170518084908150-1684749942.png "style=" margin:0px;padding:0px;border:0px; "/>This picture is about the relationship between the database (i

to reduce space usage is to take the field names as short as possible, so that space is small, but this requires a tradeoff between legibility and space occupancy. I have suggested that the author put the field name index, each of the field names in one byte, so you don't have to worry about how long the field name takes. But the author's concern is not unreasonable, this index method needs to be a result of each query to replace the index value with the original value, and then send to the cli

Used MySQL database, the whole day is to write a large heap of SQL statements, to remember that these SQL keywords are going to take a few days, write the eggs are exploded, when the contact to MongoDB, found not to write SQL, instantly feel tall on, instantly generated the impulse to learn to use it.1.MongoDB IntroductionMongoDB is a powerful, flexible, and scalable way of storing data. It extends the many

In order to better use and prolong the service life of the server, it is necessary to regularly maintain the server. However, when maintaining the server, you must be careful with the maintenance work. Otherwise, an error may cause a great impact. To help you understand some maintenance content during maintenance and avoid errors. The following are some common kn

In wireless network management, wireless network maintenance and wireless network optimization are very important and need rich experience. This is an essential task for wireless network competition. Therefore, better network performance will inevitably attract a large number of users. Therefore, management and maintenance cannot be relaxed at all. This article will introduce you in detail. How can we impro

The wireless network maintenance work often needs the experienced network administrator to coordinate, therefore the network performance often attracts many user's eyeball, here will introduce several aspects for you. How to improve the quality of network services and enhance competitiveness? I think it is necessary to strengthen the basic maintenance, ensure the equipment intact, and continuously optimize

First, awk extracts the string method between the double quotes:such as text: speed= "1000" Echo ' speed= ' 1000 ' | Awk-f ' "' {print $} ' You can also use sed: Echo ' speed= ' 1000 ' | Sed-e ' s/. "([0-9]+)". /\1/' Second, the shell uses the regular extraction of the data inside the parentheses:As an example: Su-mqm-c ' echo ' dis qmstatus conns "| RUNMQSC MQXXX999 ' | grep qmnameQmname (MQXXX999) STATUS (RUNNING)We're going to just extract MQXXX999 how to

Operating system: CENTOS,UBUNTU,REDHAT,SUSE,FREEBSDWebsite service: Nginx,apache,lighttpd,php,tomcat,resinDatabase: Mysql,mariadb,postgresqlDB Middleware: Maxscale,mycat,atlas,cobar,amoeba,mysql-proxyAgent Related: lvs,keepalived,haproxy,nginx,heartbeatSite cache: Squid,nginx,varnishNoSQL Library: Redis,memcached,mongodb,hbase,cassandra,couchdbStorage Related: Nfs,fastdfs,moosefs (MFS), Hadoop,glusterfs,lustreVersion management: Svn,gitMonitoring alar

This article describes the installation and deployment and maintenance methods for Redis2.8. Installation of Redis on Linux Step 1: First from the official website in the Redis version of the compressed package redis-2.8.19.tar.gz Http://download.redis.io/releases/redis-2.8.19.tar.gz Step 2: Compile the source program: Tar zxvf redis-2.8.19.tar.gz? 1 [neil@neilhost downloads]$ tar zxvf redis-2.8.19. Tar. gz? 1 [neil@neilhost downloads]$ CD REDIS-2.8.1

I. Download On the official MongoDB website, we found that there are 32bit and 64bit, which depends on your system, but here are two points of attention: ①: According to industry rules, the even number is "stable version" (for example, 1.6.X, 1.8.X), and the odd number is "development version" (for example, 1.7.X, 1.9.X ), I believe everyone knows the difference between the two versions. The latest version is 2.4. ②: 32-bit