mongodb ttl

The TTL index (time to live index, which has a life-cycle indexing), which allows you to set a time-out for each document. A document is deleted after it reaches the pre-set aging level. This type of index is useful for caching problems, such as the

The TTL index (time-to-live index) allows you to set a time-out for each document, which is deleted when the document exceeds that time.You can create a TTL index by specifying the EXPIREAFTERSECS option in Ensureindex:>db.foo.ensureindex

The blog has moved Https://www.tianmingxing.com MongoDB is an open-source, document-oriented NoSQL (not only SQL) database written using C + +, and one of the most popular NoSQL databases. NoSQL Introduction NoSQL means "Not just SQL", is the

First, the index introductionIn MongoDB, indexes are used to support efficient queries. If there is no index, MONGODB must scan each document in the entire collection to find a matching document. However, if an appropriate index is established,

Environment: Linux: Redhat or CentOS MONGODB installation mode 1: Install MONGODB by configuring Yum, Enterprise Edition and generic version: Not much, just look at the document [root@dominic5 ~]# Ping www.baidu.com PING www.a.shifen.com (180.97.33.7

TTL index:The TTL collection enables MongoDB to set the expiration time for stored data, after a specified period of time, or at a specified point in time, the collection is automatically cleared by Mongod. This feature facilitates the storage of

Original link http://www.cnblogs.com/zhangzili/p/4975080.htmlMongoDB knowledge points at a glance1. Start the MongoDB database:Go to the MongoDB installation directory and execute the following commandC:\Program

1. What is MongoDB?It is a NoSQL database between relational database and non-relational database, written in C + +, is a high-performance document-oriented universal database which integrates agility, scalability and extensibility.2. Why use

1. Download extract MongoDB, configure environment variablesTAR-ZXVF mongodb-linux-x86_64-rhel62-3.2.7.tgzExport Path=/bin: $PATH2. Create a data Save directoryMkdir-p/data/db3.mongodb Boot./mongod//Default boot./mongod--dbpath=/data/db//Start

1. What is MongoDB?It is a NoSQL database between relational database and non-relational database, written in C + +, is a high-performance document-oriented universal database which integrates agility, scalability and extensibility.2. Why use