Web hosting is a server on the separation of space to store many different sites, users share a virtual host IP address, users do not have a separate IP address. Virtual host has a lot of professional terms, the time to buy space, can not understand is important.
Bandwidth constraints - such as limited bandwidth per month 5G, means that visitors to the site traffic generated by the flow of the sum within a month, which includes access to web pages, images, videos, etc., you can access all of your browser flow size. So what is the site? It simply means the server from the site where the download page and related content to your computer the sum of all the file size. Connection limit - is to allow the number of individuals can also visit your site. If your site such as: rocklv.net the connection limit is 50 people, if we have 50 people at the same time to visit your site, then the first 51 people will not be able to open your site. Dual host - Currently, there are two main telecommunications network China Netcom, the South most of the telecommunications line, mostly in northern China Netcom Internet. Users to access each other's network, the access speed is very slow. So virtually, your site is slow because of the loss site visit of some visitors. To solve this problem formally, let Telecom Netcom quick access to all sites, there was double space. VPS VPS Hosting resource utilization on the server, than ordinary virtual host can not match advantage.
Foreign virtual host is the server hosting space in foreign countries, advantage is cheap, the problem is not the domestic fast access speed.
Hard drive, IDE / ATA (Parallel ATA) and Serial IDE / ATA hard disk drives are relatively inexpensive devices are often entry-level server, and uses RAID (one kind of disk array technology, the main purpose is to ensure data reliability and recoverability) for data protection. Serial ATA (Jane Writing SATA) is a standards-based interfaces, and the relative parallel IDE / ATA, it has a very significant improvement, SATA hard drives in data transfer rates are much better. Serial SCSI (Serial Attached SCSI-SAS) hard disk is now becoming increasingly popular in the server hard disk. The advantages of SATA hard disk price, SCSI hard drive strengths is designed for the high work load, SCSI hard drives than IDE / ATA hard disk is more suitable for frequent application of random IO.
ECC memory - a memory technology, and more for server memory. ECC memory is mainly start from the widely used SD memory, the new DDR, RDRAM has a corresponding application, the current mainstream of ECC memory is a kind of SD memory.
CPU frequency - said processor FSB, it is necessary that the two closely related concepts: frequency doubling and frequency, frequency is CPU clock frequency; multiplier and FSB frequency that is a multiple of the ratio. Frequency, FSB, multiplier, its relationship: frequency = FSB X multiplier.
CPU 2 Cache - Cache (Cache) size is an important indicator of the CPU, its structure and size of the impact on the CPU speed is very large. Simply put, the cache is used to store frequently used or to be used in a number of data or instructions, when necessary, when such data or instructions to read directly from the cache, so that memory than to read the hard drive even faster, able to greatly increase the CPU's processing speed.
Server type - based on the server's configuration, we can be divided into:
Blade server
A kind of HAHD (High Availability High Density, high availability high-density) and low-cost servers, each a "blade" is actually a system motherboard, similar to a separate server.
Rackmount server
Complex internal structure, internal equipment more, and some units have many different devices or several servers in a cabinet.Rack Server
Shape does not look like a computer, and like the switch, there is 1U, 2U, 4U and other specifications.Desktop Server
And roughly the same general vertical computer chassis, are low-grade server function is weak.