Simply put, it's like looking in the mirror. You can see it, but it's not the original. Two or more servers on the Internet that have the same content and update synchronously are called mirror servers except the main server. CD-ROM mirror server is a shared device of NAS(Network Attached Storage) CD-ROM network, which combines hard disk caching technology and thin server technology and is specially designed for CD-ROM network. The CD-ROM mirror server itself does not have the complicated operating system and hardware connection of the general server, but only completes the data transmission between the hard disk of the CD-ROM mirror server and the client, so that the client can enjoy the information resources on the CD at the access speed of the hard disk, eliminating the bottleneck problem of the CD-ROM drive and greatly improving the performance of the CD-ROM network.
The CD-ROM mirror server has one or more CD-ROM drives. The network administrator can mirror the CD to the hard disk of the server through the CD-ROM drive on the CD-ROM mirror server, or remotely mirror the CD to the hard disk of the CD-ROM mirror server by using the CD-ROM drive on the network server or client.
The CD-ROM mirror server itself is a WWW server, and the client can directly and remotely access and retrieve the CD-ROM mirror server through the WWW browser. CD-ROM mirror server generally supports WINDOWS NT, UNIX, NETWARE and other network operating systems, and has strong accessibility. The scalability of the CD-ROM mirror server is also very strong. Users can expand the capacity of the server by adding hard disks to the CD-ROM mirror server according to actual needs.
The CD-ROM mirror server generally adopts the network interfaces of BNC and RJ-45 standards, so it can directly access the Internet without any network file server or installing any software on the network server and client. Users only need to connect the network cable to the network hub, plug in the power supply and input the IP address information to use it. The setup, upgrade and management of the CD-ROM mirror server can be done remotely through a web browser or online neighbors, without the need for network administrators to run around. When the CD mirror server fails, it will only affect the access of its own files, and will not affect the normal operation of the whole network.
The devices for storing optical discs are mainly divided into the following categories:
1.SCSI jukebox)-"CD SERV"
The first generation optical disk library, referred to as optical disk tower for short, has been eliminated because of its small capacity (7 or 14 optical drives), slow speed and easy damage, and does not support simultaneous access by multiple users.
2.IDE CD server-"FISCC CD"
The second-generation optical disk library, referred to as optical disk server for short, adopts brand-new thin server technology, high-speed central processing unit, large-capacity memory and universal IDE interface, making it easier for users to operate and maintain, and has supported concurrent multi-user simultaneous access. This kind of products are now among the obsolete products because they can't connect to the hard disk, and their speed and storage capacity are limited by the optical drive.
3. Network Ready CD Mirror Server-"FISC CDM"
The third generation product, referred to as mirror optical disk server, has excellent cost performance and can mount 8 IDE high-capacity and high-speed hard disks at the same time. This product makes full use of the high speed and large capacity of hard disk, and it is the fastest optical disk server in the same product series in the world at present.
4. Multifunctional network storage server (network-ready CD image &; File server)-"fiscal CDH"
The fourth generation product, a new generation of network storage equipment, integrates "optical disk mirror storage" and "NAS function". The so-called mirror station is to put your existing website on a server in another place. Of course, this server can be purchased and hosted by you, or it can be a virtual server. If you put your webpage on servers in more than two different countries or regions, it means that you have set up multiple mirror stations for your website, which can speed up your website's access.
A mirror website is to put an identical site on several servers, and each server has its own URL. These servers are mirror websites. It is not much different from the main station, and can also be regarded as a backup measure of the main station. The advantage of having a mirror website is that if you can't access the main station normally (for example, a server dies or an accident happens), you can still browse other servers normally. Relatively speaking, the master station is slightly better than the mirror station in speed and so on.