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[China]
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Shenzhen Hanhai Qianda Industrial Co., Ltd |
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Genuine Windows Server 2012 Datacenter 64-bit OEM License Retail Version
Unlike its predecessor, Windows Server 2012 can switch between "Server Core" and "Server with a GUI" installation options without a full reinstallation. Server Core - an option with a command-line interface only - is now the recommended configuration. There is also a third installation option that allows some GUI elements such as MMC and Server Manager to run, but without the normal desktop, shell or default programs like File Explorer.[13]
Server Manager has been redesigned with an emphasis on easing management of multiple servers.[18] The operating system, like Windows 8, uses the Metro-based user interface unless installed in Server Core mode.[19] Windows Store is available in this version of Windows but is not installed by default.[20] Windows PowerShell in this version has over 2300 commandlets, compared to around 200 in Windows Server 2008 R2.[21]
Windows Server 2012 supports the following maximum hardware specifications.[35][48] Windows Server 2012 improves over its predecessor Windows Server 2008 R2:
| Specification | Windows Server 2012 | Windows Server 2008 R2 |
|---|---|---|
| Physical processors[a] | 64 | 64 |
| Logical processors when Hyper-V is disabled | 640 | 256 |
| Logical processors when Hyper-V is enabled | 320[b] | 64 |
| Memory | 4 TB | 2 TB |
| Failover cluster nodes (in any single cluster) | 64 | 16 |
Notes:
1 . Applies to Windows Server 2008 R2 and 2012 Datacenter and
Windows Server 2012 Standard only. Other editions support less.
2 . Each virtualized partition, including the host itself, can use
up to 64 processors.[50]
3 . Each license of Windows Server 2012 Standard or Datacenter
allows up to two processor chips. Each license of Windows Server
2012 Standard allows up to two virtual instances of Windows Server
2012 Standard on that physical server. If more virtual instances of
Windows Server 2012 Standard are needed, each additional license of
Windows Server 2012 allows up to two more virtual instances of
Windows Server 2012 Standard, even though the physical server
itself may have sufficient licenses for its processor chip count.
Because Windows Server 2012 Datacenter has no limit on the number
of virtual instances per licensed server, only enough licenses for
the physical server are needed for any number of virtual instances
of Windows Server 2012 Datacenter. If the number of processor chips
or virtual instances is an odd number, the number of licenses
required is the same as the next even number. For example, a
single-processor-chip server would still require 1 license, the
same as if the server were two-processor-chip and a
five-processor-chip server would require 3 licenses, the same as if
the server were six-processor-chip, and if 15 virtual instances of
Windows Server 2012 Standard are needed on one server, 8 licenses
of Windows Server 2012, which can cover up to 16 virtual instances,
are needed (assuming, in this example, that the processor chip
count does not exceed 16).
4 . For the Standard and Datacenter editions, each user or device
accessing the software must have a client access license (CAL)
assigned (either per-user or per-device), so there may be no more
simultaneous users than the number of client-access licenses,
except up to 2 simultaneous users purely to administer the server
software, or for running virtualization or web workloads. Remote
Desktop Services requires an additional CAL separate from the
aforementioned CAL.
5 . If the number of physical processors in a particular server is
under 64, the limit is determined by the quantity of licenses
assigned to that server. In that case, the number of physical
processors cannot exceed twice the number of licenses assigned to
the server.
