NDLI: Memorage: emerging persistent RAM based malleable main memory and storage architecture

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Memorage: emerging persistent RAM based malleable main memory and storage architecture

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Memorage: emerging persistent RAM based malleable main memory and storage architecture

Content Provider	ACM Digital Library
Author	Jung, Ju-Young Cho, Sangyeun
Abstract	This paper addresses new system design issues that will occur when a large quantity of emerging persistent RAM (PRAM) is put on the main memory bus of a platform. First, we anticipate that continued technology advances will enable us to integrate (portions of) the system storage within the PRAM modules on a system board. This change calls for comprehensive re-examination of the system design concepts that assume "slow" disk and the block I/O concept. Next, we propose Memorage, a system architecture that virtually manages all available physical resources for memory and storage in an integrated manner. Memorage leverages the existing OS virtual memory (VM) manager to improve the performance of memory-intensive workloads and achieve longer lifetime of the main memory. We design and implement a prototype system in the Linux OS to study the effectiveness of Memorage. Obtained results are promising; Memorage is shown to offer additional physical memory capacity to demanding workloads much more efficiently than a conventional VM manager. Under memory pressure, the performance of studied memory-intensive multiprogramming workloads was improved by up to 40.5% with an average of 16.7%. Moreover, Memorage is shown to extend the lifetime of the PRAM main memory by 3.9 or 6.9 times on a system with 8 GB PRAM main memory and a 240 GB or 480 GB PRAM storage.
Starting Page	115
Ending Page	126
Page Count	12
File Format	PDF
ISBN	9781450321303
DOI	10.1145/2464996.2465005
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-06-10
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Memory hierarchy Write endurance Management Performance Emerging persistent ram
Content Type	Text
Resource Type	Article

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