Editing Server (computing) (section)

=== Large servers ===
Large traditional single servers would need to be run for long periods without interruption. [[Availability]] would have to be very high, making hardware reliability and durability extremely important. [[Mission-critical]] enterprise servers would be very [[Fault tolerance|fault tolerant]] and use specialized hardware with low [[failure rate]]s in order to maximize [[uptime]]. [[Uninterruptible power supply|Uninterruptible power supplies]] might be incorporated to guard against power failure. Servers typically include hardware [[Redundancy (engineering)|redundancy]] such as dual [[power supply|power supplies]], [[RAID]] [[hard disk|disk]] systems, and [[ECC memory]],<ref>{{cite web|url=http://www.cs.rochester.edu/~kshen/papers/usenix2010-li.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.cs.rochester.edu/~kshen/papers/usenix2010-li.pdf |archive-date=2022-10-09 |url-status=live|title="A Realistic Evaluation of Memory Hardware Errors and Software System Susceptibility". Usenix Annual Tech Conference 2010|author=Li|author2=Huang|author3=Shen|author4=Chu|year=2010|access-date=2017-01-30}}</ref> along with extensive [[Preboot Execution Environment|pre-boot]] memory testing and verification. Critical components might be [[hot swappable]], allowing technicians to replace them on the running server without shutting it down, and to guard against overheating, servers might have more powerful fans or use [[water cooling]]. They will often be able to be configured, powered up and down, or rebooted remotely, using [[out-of-band management]], typically based on [[Intelligent Platform Management Interface|IPMI]]. Server casings are usually [[rack unit|flat and wide]], and designed to be rack-mounted, either on [[19-inch rack]]s or on [[Open Rack]]s.

These types of servers are often housed in dedicated [[data centers]]. These will normally have very stable power and Internet and increased security. Noise is also less of a concern, but power consumption and heat output can be a serious issue. Server rooms are equipped with air conditioning devices.

{{gallery
|File:DL380sREAR.jpg|A [[server rack]] seen from the rear
|File:Wikimedia Foundation Servers-8055 08.jpg|[[Wikimedia Foundation]] servers as seen from the front
|File:Wikimedia Foundation Servers-8055 23.jpg|[[Wikimedia Foundation]] servers as seen from the rear
|File:Wikimedia Foundation Servers-8055 02.jpg|[[Wikimedia Foundation]] servers as seen from the rear
}}