The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dalam kajian terdahulu, kami menentukan bahawa beban kerja selalunya mengandungi banyak kepekatan input-output (IO). Kepekatan sedemikian adalah pengagregatan akses IO. Ia muncul di kawasan sempit volum storan dan berterusan untuk tempoh sehingga kira-kira sejam. Kawasan sempit ini menduduki peratusan kecil kapasiti nombor unit logik, termasuk kebanyakan akses IO dan muncul pada alamat blok logik yang tidak dapat diramalkan. Kami menyiasat beban kerja ini dengan memfokuskan pada keteraturan peringkat halaman dan mendapati bahawa beban kerja ini selalunya merangkumi beberapa keteraturan. Ini bermakna caching mudah mungkin tidak mengurangkan masa tindak balas untuk beban kerja ini dengan secukupnya kerana algoritma migrasi cache menggunakan keteraturan peringkat halaman. Kami sebelum ini telah membangunkan sistem tiering storan automatik (OTF-AST) secara on-the-fly yang terdiri daripada SSD dan HDD. Algoritma migrasi mengenal pasti kepekatan IO dengan tempoh yang sederhana panjang dan memindahkannya daripada HDD ke SSD. Ini bermakna terdapat sedikit atau tiada pengurangan dalam masa tindak balas apabila beban kerja merangkumi sedikit kepekatan sedemikian. Kami kini telah membangunkan sistem storan hibrid yang terdiri daripada pemacu cache dengan SSD dan HDD dan SSD berbilang peringkat yang menggunakan OTF-AST, dipanggil "OTF-AST dengan caching." Skim OTF-AST mengendalikan akses IO yang menghasilkan kepekatan IO tempoh sederhana panjang manakala skim caching mengendalikan akses IO yang tinggal. Percubaan menunjukkan bahawa purata masa tindak balas untuk sistem kami ialah 45% daripada Facebook FlashCache pada beban kerja Microsoft Research Cambridge.
Kazuichi OE
FUJITSU LABORATORIES LTD
Takeshi NANRI
Kyushu University
Koji OKAMURA
Kyushu University
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Salinan
Kazuichi OE, Takeshi NANRI, Koji OKAMURA, "Hybrid Storage System Consisting of Cache Drive and Multi-Tier SSD for Improved IO Access when IO is Concentrated" in IEICE TRANSACTIONS on Information,
vol. E102-D, no. 9, pp. 1715-1730, September 2019, doi: 10.1587/transinf.2018EDP7253.
Abstract: In previous studies, we determined that workloads often contain many input-output (IO) concentrations. Such concentrations are aggregations of IO accesses. They appear in narrow regions of a storage volume and continue for durations of up to about an hour. These narrow regions occupy a small percentage of the logical unit number capacity, include most IO accesses, and appear at unpredictable logical block addresses. We investigated these workloads by focusing on page-level regularity and found that they often include few regularities. This means that simple caching may not reduce the response time for these workloads sufficiently because the cache migration algorithm uses page-level regularity. We previously developed an on-the-fly automated storage tiering (OTF-AST) system consisting of an SSD and an HDD. The migration algorithm identifies IO concentrations with moderately long durations and migrates them from the HDD to the SSD. This means that there is little or no reduction in the response time when the workload includes few such concentrations. We have now developed a hybrid storage system consisting of a cache drive with an SSD and HDD and a multi-tier SSD that uses OTF-AST, called “OTF-AST with caching.” The OTF-AST scheme handles the IO accesses that produce moderately long duration IO concentrations while the caching scheme handles the remaining IO accesses. Experiments showed that the average response time for our system was 45% that of Facebook FlashCache on a Microsoft Research Cambridge workload.
URL: https://global.ieice.org/en_transactions/information/10.1587/transinf.2018EDP7253/_p
Salinan
@ARTICLE{e102-d_9_1715,
author={Kazuichi OE, Takeshi NANRI, Koji OKAMURA, },
journal={IEICE TRANSACTIONS on Information},
title={Hybrid Storage System Consisting of Cache Drive and Multi-Tier SSD for Improved IO Access when IO is Concentrated},
year={2019},
volume={E102-D},
number={9},
pages={1715-1730},
abstract={In previous studies, we determined that workloads often contain many input-output (IO) concentrations. Such concentrations are aggregations of IO accesses. They appear in narrow regions of a storage volume and continue for durations of up to about an hour. These narrow regions occupy a small percentage of the logical unit number capacity, include most IO accesses, and appear at unpredictable logical block addresses. We investigated these workloads by focusing on page-level regularity and found that they often include few regularities. This means that simple caching may not reduce the response time for these workloads sufficiently because the cache migration algorithm uses page-level regularity. We previously developed an on-the-fly automated storage tiering (OTF-AST) system consisting of an SSD and an HDD. The migration algorithm identifies IO concentrations with moderately long durations and migrates them from the HDD to the SSD. This means that there is little or no reduction in the response time when the workload includes few such concentrations. We have now developed a hybrid storage system consisting of a cache drive with an SSD and HDD and a multi-tier SSD that uses OTF-AST, called “OTF-AST with caching.” The OTF-AST scheme handles the IO accesses that produce moderately long duration IO concentrations while the caching scheme handles the remaining IO accesses. Experiments showed that the average response time for our system was 45% that of Facebook FlashCache on a Microsoft Research Cambridge workload.},
keywords={},
doi={10.1587/transinf.2018EDP7253},
ISSN={1745-1361},
month={September},}
Salinan
TY - JOUR
TI - Hybrid Storage System Consisting of Cache Drive and Multi-Tier SSD for Improved IO Access when IO is Concentrated
T2 - IEICE TRANSACTIONS on Information
SP - 1715
EP - 1730
AU - Kazuichi OE
AU - Takeshi NANRI
AU - Koji OKAMURA
PY - 2019
DO - 10.1587/transinf.2018EDP7253
JO - IEICE TRANSACTIONS on Information
SN - 1745-1361
VL - E102-D
IS - 9
JA - IEICE TRANSACTIONS on Information
Y1 - September 2019
AB - In previous studies, we determined that workloads often contain many input-output (IO) concentrations. Such concentrations are aggregations of IO accesses. They appear in narrow regions of a storage volume and continue for durations of up to about an hour. These narrow regions occupy a small percentage of the logical unit number capacity, include most IO accesses, and appear at unpredictable logical block addresses. We investigated these workloads by focusing on page-level regularity and found that they often include few regularities. This means that simple caching may not reduce the response time for these workloads sufficiently because the cache migration algorithm uses page-level regularity. We previously developed an on-the-fly automated storage tiering (OTF-AST) system consisting of an SSD and an HDD. The migration algorithm identifies IO concentrations with moderately long durations and migrates them from the HDD to the SSD. This means that there is little or no reduction in the response time when the workload includes few such concentrations. We have now developed a hybrid storage system consisting of a cache drive with an SSD and HDD and a multi-tier SSD that uses OTF-AST, called “OTF-AST with caching.” The OTF-AST scheme handles the IO accesses that produce moderately long duration IO concentrations while the caching scheme handles the remaining IO accesses. Experiments showed that the average response time for our system was 45% that of Facebook FlashCache on a Microsoft Research Cambridge workload.
ER -