Explore Cisco
How to Buy

Have an account?

  •   Personalized content
  •   Your products and support

Need an account?

Create an account

Intel Optane DC Persistent Memory for Cisco Servers At-A-Glance

At a Glance

Available Languages

Download Options

  • PDF
    (240.1 KB)
    View with Adobe Reader on a variety of devices
Updated:December 22, 2020

Available Languages

Download Options

  • PDF
    (240.1 KB)
    View with Adobe Reader on a variety of devices
Updated:December 22, 2020

Table of Contents

 

 

Filling the gap between DRAM and SSDs

Intel® Optane DC Persistent Memory is a new technology designed to fill the capacity, cost, and performance gaps between traditional DRAM memory and storage for servers. While the performance of DRAM is great, it is relatively expensive and volatile (the contents disappear when the server is rebooted). SSDs, one option for storing programs and data, while faster than hard disk drives, are not nearly as fast as DIMMs, though their content isn’t volatile. Intel Optane DC Persistent Memory was designed to provide an option between DRAM and SSD, reducing the cost while potentially increasing the size of server memory and/or providing the fastest persistent storage of data. Up to half of the server’s DIMM slots can be used for Intel Optane DC Persistent Memory.

Benefits

     Increased memory size

     Ultra-fast persistent storage

     Improved TCO for workloads that need large memory

     Improved system performance for workloads with high disk I/O

Memory mode

In Memory mode, lower-cost, higher-capacity Intel Optane DC Persistent Memory modules are paired with DDR4 DIMMs to reduce the cost of a given amount of memory. For example, you now have two options to increase per-socket memory to 3 TB: 12x 256GB DDR4 DIMMs, or the more cost-effective option of 6x DDR4 DIMMs + 6x 512GB Intel Optane DC Persistent Memory modules (the DDR4 DIMMs are “invisible” to the operating system and instead act as a fast cache for the persistent memory modules). You will have to evaluate the price/performance tradeoffs to decide which is the best solution for your applications.

Simple and easy to configure

Only Cisco UCS® servers treat infrastructure as code and allow you to use polices to configure Intel Optane DC Persistent Memory. As with other server hardware features, UCS Manager can be used to define how your Intel Optane DC Persistent Memory will be used – in Memory mode, App Direct mode, or both – and how much capacity should be configured for each. Cisco Intersight can be used to configure UCS C-Series rack servers.

This approach enables you to configure hundreds of servers as easily as you can configure one server. This automation reduces the number of manual steps needed, helping reduce the opportunities for human error, improve consistency, and further shorten server and network deployment times.

Revolutionizing the hierarchy

App Direct mode

In App Direct mode, the Intel Optane DC Persistent Memory modules are used as low-latency, high-speed persistent memory for data or storage attached directly to the CPU instead of the PCIe bus. Each CPU can have up to 1.5 TB of DDR4 memory and up to 3 TB of App Direct memory/storage. This allows application developers to customize their code to make the best use of each memory type.

For more information about all Cisco UCS servers, please visit https://www.cisco.com/go/ucs.

For more information about all Cisco HyperFlex servers, please visit https://cisco.com/go/hx.

 

 

 

Learn more