| Presentation | 2015/2/26 A study of disk usage distribution analysis to set optimal quota value Takuya Kawatani, Eisuke Ito, Yoshiaki Kasahara, Naomi Fujimura, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To prevent shortage of storage space in a service system, an administrator usually set per-user quota as an upper limit of usable space for each user. To prevent service failure caused by resource exhaustion, an administrator tends to set a conservative quota value such as the storage capacity divided by the expected maximum number of users. In this research, authors analyzed long-term storage usage history of our email system and file sharing (archiving) system in Kyushu University. Mostly through the analyzed period, the usage pattern showed a long-tailed distribution similar to lognormal distribution. Also the overall storage consumption slowly increased during the analyzed period. Based on these analysis, the authors defined "storage utilization ratio" to evaluate how the storage is effectively used. By approximating a disk utilization pattern as a power-law distribution, we proposed a method to calculate an optimal quota value to maximize the utilization ratio. We applied the method to the actual data to calculate the best quota value to maximize the utilization ratio. |
| Keyword(in Japanese) | (See Japanese page) |
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| Paper # | Vol.2015-IOT-28 No.32 |
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| Conference Information | |
| Committee | IA |
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| Conference Date | 2015/2/26(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Internet Architecture(IA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study of disk usage distribution analysis to set optimal quota value |
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| 1st Author's Name | Takuya Kawatani |
| 1st Author's Affiliation | Faculty of Information Science and Electrical Engineering, Kyushu University() |
| 2nd Author's Name | Eisuke Ito |
| 2nd Author's Affiliation | Research Institute for Information Technology, Kyushu University |
| 3rd Author's Name | Yoshiaki Kasahara |
| 3rd Author's Affiliation | Research Institute for Information Technology, Kyushu University |
| 4th Author's Name | Naomi Fujimura |
| 4th Author's Affiliation | Faculty of Design, Kyushu University |
| Date | 2015/2/26 |
| Paper # | Vol.2015-IOT-28 No.32 |
| Volume (vol) | vol.114 |
| Number (no) | 495 |
| Page | pp.pp.- |
| #Pages | 7 |
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