Summary of hardware use in production environment

1. PC server

Internet company, brand DELL,HP,IBM. Tide, Lenovo, Space Union Chronicles

DELL brand

Before 2010, 1U 1850 1950jue 2u 2850 2950

2010-2014: 1U R410swap 420 R610ap620

IBM brand:

2u 3750/3850/3950

Second, power supply:

The heart of the human body, the general core business in production uses double electricity, which can be an exception in the case of clusters.

III. CPU

The human brain. Responsible for operation and control, is the core component of server performance

Production: general enterprises, 2-4 cpu trees, one cpu dual-quad core

Virtual host. 4-8 cpu trees, usually 48-128g of memory

IV. Memory

Buffer device between cpu and disk, temporary memory.

Generally, programs are scheduled to memory when they are running.

Process: the program of the operator, and the process is placed in memory

Programs: static, on disk

Enterprise case:

1) extreme cases of portals: high concurrency, large amount of data: data will be written to memory first, and then regularly or quantitatively to disk

It will eventually be loaded into memory.

Features:

A, high concurrent write performance and high data

b. You may lose some of the data in memory that you haven't had time to save to disk.

2) the case of small and medium-sized enterprises: the concurrency is not very large, and the data will be stored on disk. Then read the data into memory through the program.

To provide access services to the outside world

Since 90% of the websites are mainly read, and write is secondary, and the read-write ratio is 10:1, so concurrent writing is not a problem.

Reminder: the memory and disks here may be made up of multiple machines

5. Disk

A memory that permanently stores data.

3. 5 inch sas,sata hard drive, mechanically read (low performance). The performance is much worse than memory, so a large number of

Caching data to memory is a necessary solution.

Disk interface: SAS SATA SSD