Chapter 1 Introduction; Introduction To Intel 1St Gen. Dcpmm Memory Modules - Supermicro X11OP Series User Manual

Super 1st Gen. DCPMM Memory for X11OPx/X11QPx/X11DPx/X11SPx Motherboards Guide
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1.1 Introduction to Intel 1st Gen. DCPMM Memory Modules

Intel 1st Gen. Optane™ DC Persistent Memory Module (DCPMM), the latest memory
®
innovation, provides a new data-centric architecture that offers increased storage capabilities
for higher performance computing platforms with flexible configuration options at lower cost.
Utilizing the unique disruptive technology, DCPMM can operate as system memory, which
allows the DCPMM to have memory-like performance with the storage capacity of a solid state
drive. In addition, DCPMM can also function as storage, providing memory-like performance
with persistence and high-capacity while operating at much lower latency at an affordable cost.
DCPMM memory supports three modes: Memory Mode, App Direct Mode, and Mixed Mode.
Optimized for volatile use, Memory Mode provides a high-capacity main memory solution
with higher power efficiency at lower operational cost. All installed DDR4 DIMMs are hidden
from the operating system and act as the caching layer for the portion of the DCPMMs.
Featuring byte-addressability and cache-coherence, App Direct Mode allows memory space
to be provisioned as persistent memory where software can "talk directly to" the persistent
memory in the "byte-addressable" manner without any modifications needed. DCPMM also
offers Mixed Memory Mode, a combination of Memory Mode and App Direct Mode, which
will allow a portion of the DCPMM to be used for the Memory Mode operations, while the
remaining portion is used for the App Direct Mode operations. This is especially instrumental
for the applications that use system RAM for in-memory databases. With DCPMM memory
used in the system, there is no need for the system RAM to copy data from disk to memory,
and thus effectively eliminate in-memory database initialization delays at bootup, further
enhancing system performance.
Chapter 1
Introduction
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