MongoDB

When MongoDB is saved to the database, the default is UTC time, and when the database is saved, there is an interval between the current time and 8 hours. At the time of reading, need to convert back again, more troublesome. In fact, MONGO itself

A replica set is a cluster configuration method under MONGO:1, the main node data is synchronized to the replica node by Oplog, Oplog does not log the query statement (because it does not change the data);2, MONGO replica set can have a master node,

1, Mongodb:http://www.mongodb.org/downloads, can find 32-bit tgz file address, such as: http://fastdl.mongodb.org/linux/mongodb-linux-i686-2.4.2.tgz2. Install MongoDB (install to/usr)Cd/usrwget http://fastdl.mongodb.org/linux/mongodb-linux-i686-2.4.2

Detailed description of the latest Hive Data Operations (super detailed)The data operation capability of zookeeper is crucial to big data analysis. Data operations include exchange, moving, sorting, and transforming ). Hive provides many query

RMAN -- full -- incr0 -- incr1 three-in-one script   -H: View help information [oracle @ gc1 ~] $ Sh backup. sh-hThe following information teach you how to use this scriptbackup. sh -- fullbackup. sh -- incr0 backup. sh -- incr1 THE is the place

Directpathsync wait event Encounter direct path sync wait event When using hvr to test Big Table synchronization, encounter direct path sync wait event, after querying the official documentation, http://docs.oracle.com/cd/E11882_01/server.112/e40402/

Do not do this during database update. Preface: Do not do this during database update. What is this? Please come with me. Earlier in the year, the customer sent the text "XX, XXXXXXXX has a 0.1 million account not received, help add it ." I

Data center charging system cooperation-view Database Design I am responsible for the simplest layer D, interface layer, and factory layer for data center cooperation. Anyway, I wrote the D layer, So I designed the database simply by the way. It's

Mongodb Learning (index details) This blog will show you how to learn about mongodb indexes in detail, including index management and spatial indexes. Indexes are used to increase our query efficiency. Both relational databases and non-relational

Redis Installation error: jemalloc/jemalloc. h: Nosuchfileordirectory SolutionError description When installing Redis 2.8.18, an error is reported: Zmalloc. h: 50: 31: error: jemalloc/jemalloc. h: No such file or directoryZmalloc. h: 55: 2: error:

Database paging stored procedure, supporting multi-table joint Query Database paging stored procedure, supporting multi-table joint Query Create procedure [dbo]. [getInQuiryAllByPage] @ tableNames varchar (5000), -- table name, can be multiple

/* + SYS_DL_CURSOR */This hint Run the/* + SYS_DL_CURSOR */hint. Today in a db SQL statement, encountered this/* + SYS_DL_CURSOR */hint, after baidu, In the post of Huang Wei http://www.hellodba.com/reader.php? ID = 201It is described as follows:

Crfclust. bdb occupies a large amount of space, resulting in full disk space Crfclust. bdb occupies a large amount of space, resulting in full disk space Problem Analysis: When I got to work, I received a call from the user's site saying that a

11g result set cache restrictionsThere is a small table with a data volume of more than one million. This is similar to the IP address range lookup. The Table query volume is large. The data is generated in real time and sometimes updated.该表上的索引

An error occurred while registering the MyBtis annotation method. I recently learned about MyBatis and learned how to add, delete, modify, and query in Annotation mode. I am confused for a long time and finally find a solution to the problem! Use

Restructuring of the charging system for vb.net Data Center-Summary (1) Business and Table Structure The Charging System of the IDC room has been in progress for some time. I have received a notification two days ago and want to spot check the IDC

Import Excel table data to Sqlite database tableImport the Excel table data to Sqlite database table 1. First, prepare the Excel file, open the Excel file, and save it as a *. csv file. 2. You need to create fields for Excel Data in Sqlite according

How to import Chinese garbled characters in SQL under NavicatPremium When I asked a friend for a bug today, I was ready to import the data in her database, so I tried to import the corresponding mysql command under the mysql management tool Navicat.

Vb.net data center Charging System Reconstruction-Summary (3) software engineering document 2 In the previous article, I wrote the requirement specification to add an IPO diagram. What is an IPO diagram? I have learned more about it. An IPO refers

TNSPINGtimeout/slow response E: \ s01 \ app \ oracle \ product \ 11.2.0 \ dbhome_1 \ BIN> tnsping CENORCLTNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0-Production on 25-MAY-2015 10: 26: 59 Copyright (c) 1997,201 0, Oracle. all rights