search
HomeDatabaseMysql Tutorial大文件跨网传输技巧_MySQL

bitsCN.com

大文件跨网传输技巧

 

     运维DBA跨网传输大文件就如同上茅厕下厨房一般无二

     好的方法并非显而易见,且方法的优劣差异可能非常显著

     

     常言道:蔬菜最后一公里价格翻一翻,即便不听常言

     我们用迅雷下载常常驻足在99.9%,亦可窥见文件校验的昂贵

     整个传输需要综合考量的因素颇多,这里我仅拿是否压缩来写

     压缩无须做文件校验,且节省网络带宽,提高传输速度

     相关资源如:CPU、内存、IO,最好用vmstat -n 5看IO或者CPU是否为瓶颈

     切莫教条主义导致和数据库服务器争抢资源拖垮DB Server 

     因为压缩必然要增加CPU开销!

     

     以下介绍4种方法

     

     ㈠ rsync 

        

        利用rsync的二进制差异算法,只在网间同步变化的数据,这是rsync优势所在。

        在知道文件中大部分的内容都不需要传输的场景下,可以优先考虑使用rsync。

[plain] [mysql@even ~]$ rsync -av /backup/ -e ssh root@192.168.1.110:/bak  root@192.168.1.110's password:   sending incremental file list  ./  cdio_bak.sql    sent 1061815 bytes  received 34 bytes  163361.38 bytes/sec  total size is 1061575  speedup is 1.00    [mysql@even ~]$ mv cdio_bak.sql.bz2 /backup  [mysql@even ~]$ rsync -av /backup/ -e ssh root@192.168.1.110:/bak  root@192.168.1.110's password:   sending incremental file list  ./  cdio_bak.sql.bz2    sent 308 bytes  received 34 bytes  76.00 bytes/sec  total size is 1061757  speedup is 3104.55  

 

        显然,这次只同步了变化的308字节大小。

 

     ㈡ scp

        

        这大概会是最简单的方法,但速度较慢,因为每步都要读写磁盘

 

[plain] [mysql@even ~]$ gzip -c cdio_bak.sql > cdio_bak.sql.gz  [mysql@even ~]$ scp cdio_bak.sql.gz root@192.168.1.110:/bak    [root@odd bak]# gunzip cdio_bak.sql.gz  

 

     

     ㈢ 管道

        

        一步到位,极大降低IO开销。平时我也是用这种。

[plain] [mysql@even ~]$ gzip -c cdio_bak.sql | ssh root@192.168.1.110 "gunzip -c - > /bak/cdio.sql"  

 

 

     ㈣ nc

        

        跨网ssh并非最佳,netcat能使数据在网间"裸奔",避免加密带来的系统开销。

[plain] 

ODD机器[受]:  

犹如饿坏了的宠物小狗,张着嘴等着小主人喂食  

[root@odd ~]# nc -l -p 55555 | tar zxvf -  

  

EVEN机器[攻]:  

比如贪玩的小主人,往小狗嘴里倒东东  

[root@even ~]# tar zcvf - mm | nc 192.168.1.110 55555  

 

bitsCN.com
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
What are stored procedures in MySQL?What are stored procedures in MySQL?May 01, 2025 am 12:27 AM

Stored procedures are precompiled SQL statements in MySQL for improving performance and simplifying complex operations. 1. Improve performance: After the first compilation, subsequent calls do not need to be recompiled. 2. Improve security: Restrict data table access through permission control. 3. Simplify complex operations: combine multiple SQL statements to simplify application layer logic.

How does query caching work in MySQL?How does query caching work in MySQL?May 01, 2025 am 12:26 AM

The working principle of MySQL query cache is to store the results of SELECT query, and when the same query is executed again, the cached results are directly returned. 1) Query cache improves database reading performance and finds cached results through hash values. 2) Simple configuration, set query_cache_type and query_cache_size in MySQL configuration file. 3) Use the SQL_NO_CACHE keyword to disable the cache of specific queries. 4) In high-frequency update environments, query cache may cause performance bottlenecks and needs to be optimized for use through monitoring and adjustment of parameters.

What are the advantages of using MySQL over other relational databases?What are the advantages of using MySQL over other relational databases?May 01, 2025 am 12:18 AM

The reasons why MySQL is widely used in various projects include: 1. High performance and scalability, supporting multiple storage engines; 2. Easy to use and maintain, simple configuration and rich tools; 3. Rich ecosystem, attracting a large number of community and third-party tool support; 4. Cross-platform support, suitable for multiple operating systems.

How do you handle database upgrades in MySQL?How do you handle database upgrades in MySQL?Apr 30, 2025 am 12:28 AM

The steps for upgrading MySQL database include: 1. Backup the database, 2. Stop the current MySQL service, 3. Install the new version of MySQL, 4. Start the new version of MySQL service, 5. Recover the database. Compatibility issues are required during the upgrade process, and advanced tools such as PerconaToolkit can be used for testing and optimization.

What are the different backup strategies you can use for MySQL?What are the different backup strategies you can use for MySQL?Apr 30, 2025 am 12:28 AM

MySQL backup policies include logical backup, physical backup, incremental backup, replication-based backup, and cloud backup. 1. Logical backup uses mysqldump to export database structure and data, which is suitable for small databases and version migrations. 2. Physical backups are fast and comprehensive by copying data files, but require database consistency. 3. Incremental backup uses binary logging to record changes, which is suitable for large databases. 4. Replication-based backup reduces the impact on the production system by backing up from the server. 5. Cloud backups such as AmazonRDS provide automation solutions, but costs and control need to be considered. When selecting a policy, database size, downtime tolerance, recovery time, and recovery point goals should be considered.

What is MySQL clustering?What is MySQL clustering?Apr 30, 2025 am 12:28 AM

MySQLclusteringenhancesdatabaserobustnessandscalabilitybydistributingdataacrossmultiplenodes.ItusestheNDBenginefordatareplicationandfaulttolerance,ensuringhighavailability.Setupinvolvesconfiguringmanagement,data,andSQLnodes,withcarefulmonitoringandpe

How do you optimize database schema design for performance in MySQL?How do you optimize database schema design for performance in MySQL?Apr 30, 2025 am 12:27 AM

Optimizing database schema design in MySQL can improve performance through the following steps: 1. Index optimization: Create indexes on common query columns, balancing the overhead of query and inserting updates. 2. Table structure optimization: Reduce data redundancy through normalization or anti-normalization and improve access efficiency. 3. Data type selection: Use appropriate data types, such as INT instead of VARCHAR, to reduce storage space. 4. Partitioning and sub-table: For large data volumes, use partitioning and sub-table to disperse data to improve query and maintenance efficiency.

How can you optimize MySQL performance?How can you optimize MySQL performance?Apr 30, 2025 am 12:26 AM

TooptimizeMySQLperformance,followthesesteps:1)Implementproperindexingtospeedupqueries,2)UseEXPLAINtoanalyzeandoptimizequeryperformance,3)Adjustserverconfigurationsettingslikeinnodb_buffer_pool_sizeandmax_connections,4)Usepartitioningforlargetablestoi

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment