mongodb geonear

Indexes can often greatly improve the efficiency of queries, and if there is no index, MongoDB must scan every file in the collection and select those records that meet the query criteria when reading the data. This scan full set of query efficiency

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

Learning MongoDB 8: MongoDB index (index restrictions) (2), mongodb IndexI. Introduction In the previous article, we introduced basic index operations through db. collection. the createIndex (keys, options) syntax creates an index. We will continue

/*** MongoDB $type operator*/ /*** The $type operator is based on the Bson type to retrieve the matching data type in the collection and returns the result.* The types of MongoDB that can be used are shown in the following table:* Type Number Notes*

I. MongoDB INTRODUCTION (http://docs.mongoing.com/manual/applications/geospatial-indexes.html)MongoDB provides a series of indexing and querying mechanisms to handle geospatial information. This section describes the geo-index characteristics of

Some basics forget to check at any time.#整备恢复Mongodump--port 20001--authenticationdatabase=admin-u *-D lvlv-c lvlv-o/homeMongorestore--drop--host 172.16.201.74--port 20001--authenticationdatabase=admin-umgbackup-d test/tmp/liding/test

I. Index operation indexes are generated to optimize the query speed. The indexes of MongoDB and other relational databases, such as MySQL and Oracle, are almost the same, their index optimization experience also applies to MongoDB. 1. Create an

First, the introduction of replicationThe so-called replication is the process of synchronizing data between multiple hosts.1. Data redundancy and availabilityReplication technology provides data redundancy and availability, using multiple copies of

MongoDB database data aggregation & amp; Pipe operations, mongodb database AggregationThe data aggregation process for pipeline operations on mongodb usually works with pipeline operations. The pipeline operation concept of mongodb is similar to the

This is a creation in Article, where the information may have evolved or changed. Under the latest version of the Mongodb3.2, under the MongoDB PHP driver. PHP version is php7,php operation MongoDB class file, the results of the MONGO class does not