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| Presentation | 2015-08-05 16:15 Fragmentation-aware Write Optimization for Flash SSDs Shugo Ogawa, Takuya Araki (NEC)  CPSY2015-32 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Flash SSDs are becoming available to the purpose of storing stream data from many devices with an increase in capacity and a decrease in price. These streams are frequently fragmented by other ones in SSDs. However, it is difficult to mitigate these fragmentations by employing prior hot/cold data separation schemes that depend on access locality. In this paper, we propose Cold Data Defragmentation scheme that focuses on fragmentations caused by cold data. This scheme dissolves fragmentations of cold data by rewriting them for the purpose of avoiding relocation of fragmented data in SSDs. Evaluation result shows that our scheme reduces write data to NAND Flash in SSDs up to 58 % by rewriting fragmented cold data. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | SSD / NAND Flash / fragmentation / Garbage Collection / stream / rewrite / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 174, CPSY2015-32, pp. 173-178, Aug. 2015. | |
| Paper # | CPSY2015-32 | |
| Date of Issue | 2015-07-28 (CPSY) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | CPSY2015-32 |
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| Conference Information | |
| Committee | CPSY DC IPSJ-ARC |
| Conference Date | 2015-08-04 - 2015-08-06 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | B-Con Plaza (Beppu) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Parallel, Distributed and Cooperative Processing |
| Paper Information | |
| Registration To | CPSY |
| Conference Code | 2015-08-CPSY-DC |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Fragmentation-aware Write Optimization for Flash SSDs |
| Sub Title (in English) | |
| Keyword(1) | SSD |
| Keyword(2) | NAND Flash |
| Keyword(3) | fragmentation |
| Keyword(4) | Garbage Collection |
| Keyword(5) | stream |
| Keyword(6) | rewrite |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Shugo Ogawa |
| 1st Author's Affiliation | NEC Corporation (NEC) |
| 2nd Author's Name | Takuya Araki |
| 2nd Author's Affiliation | NEC Corporation (NEC) |
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| Speaker | Author-1 |
| Date Time | 2015-08-05 16:15:00 |
| Presentation Time | 30 minutes |
| Registration for | CPSY |
| Paper # | CPSY2015-32 |
| Volume (vol) | vol.115 |
| Number (no) | no.174 |
| Page | pp.173-178 |
| #Pages | 6 |
| Date of Issue | 2015-07-28 (CPSY) |
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