Table of Contents

Capacity Specification

Your deployment (the number of servers and the use case you have it for) determines your choice of NCache License, Edition, and Package. The use case helps determine what features you should use, thus, establishing what Edition you should use.


For NCache Enterprise and Professional, you can move licenses from one environment to another by deactivating/reactivating them when needed.

After which, the most critical consideration is the number of vCPUs you will require.


For assistance with the planning process, please contact Alachisoft Support.

As part of capacity planning (when you contact Alachisoft Support), you will have to provide information about your deployment. This includes the number of web servers you have, the number of cache servers you intend to use, and the hardware profile of your servers. You must ensure you have ample resources for deployment, and your primary focus should be on the following:

  • vCPUs: NCache is a highly multi-threaded software and takes full advantage of extra cores. The most common configuration for NCache is eight cores or higher. You may need more powerful processing if you have higher transaction loads or tonnes of data stored in NCache.

  • RAM: Ensure that the amount of memory you have available works based on your use case, as with more connected applications, there is more data, and more memory is required.

  • Network: You will require a network that minimizes latency and improves response time and cluster communication, as cache servers are incredibly chatty, and a fast network helps facilitate the constant communication between the application and the servers.

In most cases, a minimum of 8 vCPUs with 16 GB RAM is recommended, regardless of the size of your working set. However, you can use 4 vCPUs for 8 GB if they have a very simple use case.

Types of NCache Licensing

NCache licensing is vCPU based, where the license is bound to machine specifications (like the vCPUs, RAM, MAC addresses, IP addresses, machine names, etc.).


NCache Servers refer to the boxes hosting the cache, and the term NCache clients refer to the boxes hosting your applications.

Based on these specifications NCache offers two types of licensing, which have been discussed as follows:

Server-only (SO) Licensing

In server-only licensing, you only purchase NCache cache servers. These servers are licensed based on a combination of RAM & vCPUs. In this model, you get unlimited clients. This model is recommended if you have a large number of clients. While choosing this model, please ensure that your cache servers are mapped according to your plan.


It is best if you follow the plans exactly as detailed. For example, if you opt for the 4GB plan, ensure that you have 4 GB available and 2 vCPUs.

NCache Server-only (SO) Plans Licensed RAM and vCPUs
4GB SO-Plan 4 GB, 2 vCPUs
8GB SO-Plan (recommended) 8 GB, 4 vCPUs
16GB SO-Plan 16 GB, 8 vCPUs
32GB SO-Plan 32 GB, 12 vCPUs
64GB SO-Plan 64 GB, 16 vCPUs
128GB SO-Plan 128+ GB, 32+ vCPUs

Client-server (CS) Licensing

In client/server licensing, you must explicitly purchase and activate the clients and servers, compared to Server-only, where you only need to do this for the servers. This licensing model is recommended when you have a smaller number of clients.

NCache Client-Server CS Plans Licensed vCPUs (No RAM restriction)
8 vCPU CS-Plan (recommended) 1-8 vCPUs
12 vCPU CS-Plan 12 vCPUs
16 vCPU CS-Plan 16 vCPUs
24 vCPU CS-Plan 24 vCPUs
48 vCPU CS-Plan 32 vCPUs
64 vCPU CS-Plan 64 vCPUs

You can learn more about this and other licenses via NCache Pricing.


NCache is very flexible in terms of deployment. You can deploy it on the cloud, on-prem, or using a containerized environment. Similarly, NCache lets you choose whether to opt for Windows or Linux.


When deploying NCache, please ensure that everything (applications, cache servers, web servers, etc.) is on the same network, subnet, and IP range - avoiding latency.