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Windows Server Generally available as of Oct. Over time these changes will likely increase server licensing costs, in part by shifting purchases to Datacenter edition, as well as impact hardware specifications and equipment upgrade schedules, the timing of new license purchases, and SA renewal decisions. While the significance of each change may vary by customer, most will find at least one relevant change.
Servers Licensed by Cores Windows Server requires purchase of both client-side and server-side licenses. Client-side licenses—called Client Access Licenses CALs —provide the right for users or end-user devices to access servers, and server-side licenses provide the right to run the software on a physical server. With Windows Server , client-side licensing such as CAL requirements, types, and pricing remains mostly the same, but server-side licensing changes dramatically, moving from a processor- to a core-based licensing model.
Old Rule For Windows Server R2, a server license Datacenter or Standard edition is required for each pair of physical processors within the server.
A server with one or two processors requires one server license, and a server with four processors requires two server licenses. The number of processor cores independent processing units contained on a physical processor chip is immaterial.
New Rule With Windows Server , servers require core licenses that are sold in two-packs, with each two-pack costing one eighth of the price of the current Windows Server R2 edition server license. See the chart " Windows Server Pricing ".
The minimum number of core licenses required for a server is the greatest of Eight core licenses per processor Sixteen cores licenses per server. If the actual number of physical cores within a system exceeds these amounts, additional core licenses are required. For licensing purposes, all physical cores are treated equally, regardless of processor manufacturer or technical characteristics, such as hyper-threading or clock speed.
For example, a two-processor server with six cores per processor 12 physical cores total still requires 16 core licenses, and a four-processor server with four cores per processor 16 physical cores total still requires a total of 32 core licenses. However, a two-processor server with 12 cores per processor surpasses the minimums, and thus the number of core licenses required equals the actual total number of physical cores in the server, in this case, The net effect of the new licensing model and pricing is to maintain or increase server licensing costs.
The cost of licensing a single processor server with 16 or fewer cores does not change. The same is true for any multiprocessor server with eight or fewer cores per processor. Otherwise, costs increase. The default license grants for customers with active SA on Windows Server licenses is 16 Windows Server core licenses for each Windows Server R2 server license. However, for some customers, the default core conversion rates may be insufficient to adequately license the server hardware they already have deployed.
Microsoft gives SA customers the option to document and claim extra core licenses beyond the default grant, based on the server hardware deployed at the end of the SA coverage period active as of Oct. If customers planning to claim greater than the default 1: Implications The move to a core-based license model provides an incentive for many existing Windows Server SA customers to document core counts to maximize core entitlements.
For SA and non-SA customers alike, the model change may impact both server hardware and software purchase decisions, especially for Datacenter-licensed systems, where each additional core can have an especially significant cost impact. Scanning servers and documenting core counts. Customers with SA on server licenses should strongly consider scanning and documenting core counts prior to the expiration of their current SA term which for almost all customers will expire sometime prior to Oct.
Many SQL Server customers failed to capitalize on a similar opportunity a few years ago when SQL Server's license model was changed, leading to extra license expense that might have been at least partially avoidable. If a customer is planning to renew SA, such documentation allows them to accurately assess the number of SA-only core SKUs they need and are entitled to purchase at renewal. If a customer is planning to drop SA, such a report could prove especially useful in a future license compliance review, as situations involving dropped SA tend to be subject to greater scrutiny.
Absent documentation, auditors would most likely assume a 1: Though not mentioned in the Product Terms, a Windows Server Licensing Datasheet recommends sharing the inventory data with Microsoft. Directions on Microsoft advises customers to take this a step further by sending Microsoft the inventory report along with their calculation of the resultant core entitlement. Furthermore, each customer could also notify Microsoft that, unless they hear back by a certain date, they will proceed in good faith on the assumption that Microsoft finds the report's format and customer interpretation acceptable.
This might help mitigate the risk that, years later during a future audit, the report's accuracy and interpretation is questioned. Server hardware specifications.
Before purchasing a single processor server with more than 16 cores or a multiprocessor server with processors containing more than eight cores each, customers should first exhaust other options for increasing server performance, including higher performance processors with the same core count and higher performance RAM or storage.
Hardware performance benchmarking could help avoid unnecessary software licensing fees. Hardware purchase timing. SA customers can maximize their core license grants by rolling out server hardware upgrades before the end of their current SA terms and documenting core counts.
For example, a customer might be planning to upgrade a dual processor server from eight cores per processor to 14 cores per processor, a total of 28 cores. Completing the hardware upgrade before the current SA term ends entitles the customer to renew SA on 28 core licenses.
If the customer has not completed the hardware upgrade when the current SA term ends, the customer may only renew SA on 16 core licenses and must later buy 12 core licenses from scratch when the hardware upgrade is complete. New Windows Server license purchase timing. Many EA customers have the option to continue to purchase Windows Server R2 server licenses until their current EA contracts expire. In certain situations, it may be less expensive to purchase Windows Server R2 licenses at the end of the then-current EA enrollment to maximize core grants under the server-to-core license conversion rules rather than to wait until the EA contract is renewed and purchase Windows Server core licenses.
Some New Features Unique to Datacenter Edition With Windows Server , the two most important OS editions, Datacenter and Standard, have greater technical differences than they did in past versions, which could force use of Datacenter in more scenarios. Old Rule With Windows Server and R2, Standard and Datacenter are essentially technically identical; the only substantive difference is use rights pertaining to virtualization.
A server licensed for Datacenter edition may be used by an organization to simultaneously run as many Windows Server—based virtual machines VMs as the server hardware can handle. This gives organizations running virtualized data centers maximum flexibility to move VMs among Datacenter edition—licensed servers for load balancing, patching, or other processes. Standard edition, in contrast, covers up to two simultaneously running VMs per server license, which constrains an organization's ability to move workloads among servers because of the fixed limit.
However, Standard and Datacenter differ technically. Most new Windows Server features are exclusive to Datacenter. Standard retains all of the capabilities it has in Windows Server R2, but it receives only a few Windows Server enhancements. Windows Server features in both editions include Nano Server, a Windows Server OS installation mode designed to minimize on-disk footprint and RAM requirements, and Windows Containers, a technology that allows server-based applications to be quickly installed or upgraded without traditional installers or scripts with minimal impact on other applications.
New technical features exclusive to Windows Server Datacenter edition focus on storage, administrative, and networking improvements. See the illustration " Windows Server Edition Packaging ".
With the new technical features, Datacenter becomes more compelling in this regard, compared to both Windows Server Standard edition and to competitors' offerings.
For example, customers already using Datacenter edition for VM consolidation can, through a feature called Storage Spaces Direct S2D , leverage inexpensive commodity disks inside host servers for storage rather than use costly storage area network SAN hardware and software.
However, Microsoft's decision to require Datacenter for advanced storage features could limit the use of those features in certain scenarios, such as branch offices or data center architectures where storage and compute roles are provided on separate hardware. In such scenarios, having to license Datacenter edition rather than the much less expensive Windows Server Standard edition for each storage node could make Windows Server uneconomical compared to third-party alternatives. New Servicing Model Could Add SA Dependency Servicing models define the frequency with which additional features and capabilities are made available for a product.
Unlike in the past, Windows Server provides two rather than one servicing model, and aspects of both models could affect customer choices for deploying and licensing the server OS. Old Rule Historically, the way Microsoft delivered major new or enhanced features for Windows Server was to ship a new product version, with each new version supported with free security and reliability fixes for up to 10 years.
Versions alternated between major releases designated by a year, such as Windows Server and minor releases distinguished with an "R2" for "Release Two," such as Windows Server R2. While Microsoft always issued new server-side licenses for each new version, R2 releases of Windows Server had no CALs of their own and access was licensed with CALs for the immediate preceding non-R2 version.
From a licensing and support perspective, LTSB releases are similar in concept to "versions" as used prior to the introduction of Windows 10 and Windows Server For each LTSB release, Microsoft commits to supplying security updates, critical bug fixes, and antimalware definition updates monthly or more frequently for 10 years, the same support life-cycle policy that applies to earlier versions of Windows Server.
Organizations that want new features must deploy a subsequent LTSB release. New LTSB releases are expected every two to three years. Microsoft has not indicated an intention to distinguish between major and minor releases, in which case upgrading to a new LTSB release will probably require upgrades of CALs as well as server licenses. However, CBB also delivers feature updates two to three times a year. Microsoft will offer security updates and bug fixes only for systems running the two most recently released CBB feature updates meaning organizations will have to deploy OS feature updates to servers on CBB roughly every eight to 12 months.
Implications The Windows Server servicing model changes mean customers will need to exercise greater caution for how they deploy the server OS. While customers who have both server- and client-side licenses covered by SA are not immediately affected, they need to be aware that use of Nano Server will eliminate options to drop SA in the future.
To minimize the likelihood of subsequent license compliance issues, customers without SA coverage should be sure to internally communicate a policy prohibiting use of Nano Server. Customers with CALs not covered by SA, either because they did not buy SA or because they let it lapse, might reconsider how they acquire new Windows Server client-side licenses in the future.
In contrast, Windows Server Standard is more limited. A minimally licensed Standard edition server provides the right to run just two simultaneous VMs. Due to the finer details of the new core-based license model, the cost of using Windows Server Standard to license servers running more than two simultaneous VMs increases dramatically in certain scenarios. Licenses that provide the right to run Windows Server are associated with assigned to server hardware and cannot be reassigned frequently between physical servers.
Thus, servers used to run virtualized workloads that can move between servers for load balancing and other reasons must be licensed to accommodate the maximum number of Windows Server—based VMs that might ever run simultaneously on the device.
Old Rule A Windows Server R2 Standard license, which covers a one- or two-processor server, includes the right to run up to two VMs simultaneously per license. For example, if a server has two processors and the organization wants to run four VMs simultaneously on the server, the organization may assign the server two Windows Server R2 Standard licenses. New Rule Under the new core-based license model, a customer earns the right to simultaneously run two VMs on a server each time they acquire the minimum number of Standard edition core licenses required to cover the server.
Double licensing the cores with Standard edition earns the right to run four simultaneous VMs, and triple licensing earns six. This aspect of the new core-based model will have the most immediate and dramatic effect on dual and quad processor servers.
Dual processor server. Any dual processor server with processors containing 10 or more cores becomes more expensive to license using Standard. For example, a dual processor server with 12 cores per processor requires 24 core Standard edition licenses for two VMs and 48 core licenses for four VMs. Quad processor server. The cost of licensing a server containing four processors for more than two simultaneously running VMs using Standard edition will, at minimum, double.
Under the old model, a quad processor server needs two Windows Server R2 Standard edition licenses to cover four physical processors and four simultaneous VMs. Under the new model, customers need a minimum of 32 core licenses to cover the four processors and two VMs, and then another 32 core licenses to increase the number of allowed VMs to four.
Sixty-four Windows Server Standard edition core licenses costs twice as much as two Windows Server R2 Standard edition licenses.
Implications Historically, customers who use Standard edition license stacking to license servers for modest numbers of VMs can face problems in a license compliance review, especially if they are unable to show, through hypervisor configuration, that it is impossible for more than a set number of VMs ever to run simultaneously on the device. By raising the cost of using Standard edition in certain virtualization scenarios, the Standard edition rule change provides yet another incentive to consolidate VM workloads onto Datacenter-licensed servers.
Microsoft's licensing rules make Datacenter edition a more straightforward licensing approach for virtualized workloads as it relieves customers from having to monitor or limit the number of simultaneously running VMs.
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Senior U. You may not be thrilled with the results. Beyond the first license, there's no minimum number that must be purchased per server. With Windows Server , due later this year, customers will have to purchase licenses based on the number of activated processor cores in each server. Licenses will be sold in packs covering two cores, and customers will be required to purchase enough licenses to cover at least eight cores for each physical processor, regardless of how many cores are actually in their server, Barnett said. Barnett sees three key problems.