MongoDB可使用标准的方法实现日志轮转,即获取到当前日志并开启一个新的。为了实现它,mongod实例通过在文件名称末尾添加UTC(GMT
MongoDB可使用标准的方法实现日志轮转,即获取到当前日志并开启一个新的。为了实现它,mongod实例通过在文件名称末尾添加UTC(GMT)时间戳的方式重命名当前的日志文件,然后打开这个新的log文件,关闭之前旧的log 文件,并发送所有新的日志信息到新的log文件中。
Rotation Setps
MongoDB标准的日志轮转方法是通过日志轮转命令,或者让mongod进程接受到一个SIGUSER1信号,以下具体的实现方法
1 开启mongod进程,保证appending enabled
mongod -v --logpath /var/log/mongodb/server1.log --logappend
2 在终端查看是否有mongo日志文件
ls /var/log/mongodb/server1.log*
3 如果是Windows系统,打开mongo shell,进入admin数据库并敲入轮转命令,,即
use admin
db.runCommand( { logRotate : 1 } )
如果是Linux系统,则在终端运行 kill -SIGUSR1
4 再次查看结果是否有新的mongo日志文件生成
ls /var/log/mongodb/server1.log*
My auto script and crontab
以下是我用python写的定时脚本,每天产生一个新的log,超过10天的log自行删除
#!/bin/env python
import sys
import os
import commands
import datetime,time
#get mongo pid
mongo_pid = commands.getoutput("/sbin/pidof mongod")
print mongo_pid
#send Sig to mongo
if mongo_pid != '':
cmd = "/bin/kill -USR1 %s" %(mongo_pid)
print cmd
mongo_rotate = commands.getoutput(cmd)
else:
print "mongod is not running..."
#clean log which > 10 days
str_now = time.strftime("%Y-%m-%d")
dat_now = time.strptime(str_now,"%Y-%m-%d")
array_dat_now = datetime.datetime(dat_now[0],dat_now[1],dat_now[2])
lns = commands.getoutput("/bin/ls --full-time /var/log/mongodb/|awk '{print $6, $9}'")
for ln in lns.split('\n'):
ws = ln.split()
if len(ws) != 2:
continue
ws1 = time.strptime(ws[0],"%Y-%m-%d")
ws2 = datetime.datetime(ws1[0],ws1[1],ws1[2])
if (array_dat_now - ws2).days > 10:
v_del = commands.getoutput("/bin/rm -rf /var/log/mongodb//%s" % (ws[1]))
在root下crontab -e查看定时任务
0 2 * * * /home/jiangjianjian/mongo_log_rotate.py >/home/jiangjianjian/null 2>&1
CentOS编译安装MongoDB
CentOS 编译安装 MongoDB与mongoDB的php扩展
CentOS 6 使用 yum 安装MongoDB及服务器端配置
Ubuntu 13.04下安装MongoDB2.4.3
MongoDB入门必读(概念与实战并重)
Ubunu 14.04下MongoDB的安装指南
《MongoDB 权威指南》(MongoDB: The Definitive Guide)英文文字版[PDF]
Nagios监控MongoDB分片集群服务实战
基于CentOS 6.5操作系统搭建MongoDB服务
MongoDB 的详细介绍:请点这里
MongoDB 的下载地址:请点这里
本文永久更新链接地址:

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 English version
Recommended: Win version, supports code prompts!

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool