JD Logistics Operation and Maintenance Port is mainly responsible for logistics, daily operations, and querying some abnormal logistics and solving some logistics problems.

Generally speaking, operation and maintenance engineers are the operation and maintenance engineers of Internet companies. They usually belong to the technical department, which supports Internet product technology and research and development, testing and system management. The division between domestic and foreign companies and large and small companies will be different. The main work content is as follows:

1. Ensure the long-term stable operation of the business system

After all, if there is a little error in the business system, users will complain, so the core work of the operation and maintenance engineer is to ensure that the business system can run stably.

First of all, you must know what the business runs on. Generally speaking, website servers are nginx, apache, etc., relying on mysql database for data storage and PHP for parsing, so operation and maintenance engineers must master the knowledge of environment deployment such as LNMP and LAMP.

2. Ensure data security and reliability

Data security is the most important part for company leaders. Operation and maintenance engineers must also ensure data security and reliability. If there is a little mistake, the leader will have to ask the operation and maintenance for tea.

Sometimes you need to manually change the content of the database, you must learn to master the knowledge of adding, deleting, checking and modifying the Mysql database;

Sometimes you need to deal with the database server hardware failure, you need Mysql master-slave replication for emergency use;

Sometimes you need to restore the database, you need to learn mysql incremental backup and recovery to restore to a specified time point;

Sometimes scheduled backup is not enough, you need to use rsync+inotify for real-time backup;

Sometimes in order to increase server security, you need to use iptables to control the company's IP or jump server IP access rights;

3. Build a monitoring and alarm system

Operation and maintenance engineers often use zabbix and nagios for alarm monitoring. If there is no monitoring operation and maintenance, you are blind, so you must first build an alarm monitoring system, and then solve system failures.

Generally speaking, common faults include application faults, database faults, network cable faults, etc. Some are software faults, and sometimes hardware faults. An experienced operation and maintenance engineer can locate the cause of the fault in the first place.

4. Handling of technical and business problems

There are two core issues here, namely technical issues and business issues. Technical issues mainly require network packet capture analysis, tcpdump packet capture analysis, proxy mechanism, etc.;

Business issues are more complicated than technology. For example, data analysis at the business level not only requires statistics of various business indicators, but also requires analysis and dissection of the data to find out where the business problems are.

5. Version testing and online

This is also a common work content of operation and maintenance engineers. They are responsible for version testing and online. Before developers release the version, operation and maintenance engineers need to perform performance and function testing; in addition, when the version is online, it is best to go online at night when the business volume is small to avoid excessive pressure on the online version.

Summary

Operation and maintenance and development are two completely different directions. If you are doing operation and maintenance, it is not impossible to change positions if you have a foundation in development.

Operation and maintenance is responsible for the operation and maintenance of specific product lines. At the same time, you need to master the ability of development, go deep into the business, understand the pain points and problems of the business, and develop/optimize the platforms, tools and means for product business needs. You can access various excellent system architectures and have the ability to compare the advantages and disadvantages. At the same time, the control of the business determines the role of the corresponding operation and maintenance engineers in business development.