NDLI: Extending Lifetime and Reducing Garbage Collection Overhead of Solid State Disks with Virtual Machine Aware Journaling

Content Provider	IEEE Xplore Digital Library
Author	Ting-Chang Huang Da-Wei Chang
Copyright Year	2011
Abstract	Virtualization is becoming widely deployed in commercial servers. In our previous study, we proposed Virtual Machine Aware journaling (VMA journaling), a file system journaling approach for virtual server environments. With reliable VMM and hardware subsystems, VMA journaling eliminates journal writes while ensuring file system consistency and data integrity in virtual server environments, allowing it to be an effective alternative to traditional journaling approaches in these environments. In recent years, solid-state disks (SSDs) have shown their potential as a replacement of traditional magnetic disks in commercial servers. In this paper, we demonstrate the benefits of VMA journaling on SSDs. We compare the performance of VMA journaling and three traditional journaling approaches (i.e., the three journaling modes of the ext3 journaling file system) in terms of lifetime and garbage collection overhead, which are two key performance metrics for SSDs. Since a Flash Translation Layer (FTL) is used in an SSD to emulate traditional disk interface and the SSD performance highly depends on the FTL being used, three state-of-the-art FTLs (i.e., FAST, Super Block FTL and DFTL) are implemented for performance evaluation. The performance results show that, traditional full data journaling could reduce the lifetime of the SSD significantly. VMA journaling extends the SSD lifetime under full data journaling by up to 86.5%. Moreover, GC overhead is reduced by up to 80.6% when compared to the full data journaling approach of ext3. Finally, VMA journaling is effective under all the FTLs. These results demonstrate that VMA journaling is effective in SSD-based virtual server environments.
Starting Page	1
Ending Page	8
File Size	406600
Page Count	8
File Format	PDF
ISBN	9781457718755
ISSN	15219097
e-ISBN	9780769545769
DOI	10.1109/ICPADS.2011.61
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-07
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	File systems Virtual machining Servers Operating systems Flash memory Benchmark testing Hardware virtual machine journaling file system flash translation layer
Content Type	Text
Resource Type	Article
Subject	Hardware and Architecture

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

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