NDLI: Minimizing the Hidden Cost of RDMA

Content Provider	IEEE Xplore Digital Library
Author	Frey, P.W. Alonso, G.
Copyright Year	2009
Abstract	Remote Direct Memory Access (RDMA) is a mechanism whereby data is moved directly between the application memory of the local and remote computer. In bypassing the operating system, RDMA significantly reduces the CPU cost of large data transfers and eliminates intermediate copying across buffers, thereby making it very attractive for implementing distributed applications. With the advent of hardware implementations of RDMA over Ethernet (iWARP), its advantages have become even more obvious. In this paper we analyze the applicability of RDMA and identify hidden costs in the setup of its interactions that, if not handled carefully, remove any performance advantage, especially in hardware implementations. From an application point of view, the major difference to TCP/IP based communication is that the buffer management has to be done explicitly by the application. Without the proper optimizations, RDMA loses all its advantages. We discuss the problem in detail, analyze what applications can profit from RDMA, present a number of optimization strategies, and show through extensive performance experiments that these optimizations make a substantial difference in the overall performance of RDMA based applications.
Starting Page	553
Ending Page	560
File Size	363286
Page Count	8
File Format	PDF
ISBN	9780769536590
ISSN	10636927
DOI	10.1109/ICDCS.2009.32
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-22
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Costs TCPIP Application software Distributed computing Operating systems Ethernet networks Hardware Performance analysis Switches Delay Performance RDMA iWARP Buffer Management Application Suitability
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

A Performance Analysis of the Ammasso RDMA Enabled Ethernet Adapter and its iWARP API

Implementation and Evaluation of iSCSI over RDMA

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RNIC-PI: The last step in standardizing RDMA

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