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Abstract / Description of output
As the number of disks in a storage sub-system keeps increasing, the back-end network may become the bottleneck and thus impose a constraint on system performance. Unfortunately, there is no visible literature base on storage back-end network bottlenecks and scalability. This paper studies the scalability of the back-end network by answering two questions: (1) which factors affect the back-end network bandwidth requirements of disks? (2) given an interconnection network, how many disks can be connected to the system? Both analytical and simulation approaches are used. The major results are: (1) the back-end network bandwidth requirement per disk is primarily determined by workload features and the stripe unit size; (2) the number of disks that a system can accommodate is limited by the back-end network bandwidth. Systems with smaller stripe unit size have better network scalability. We present accurate quantitative results on the bandwidth requirement and the back-end network saturation points for a number of conventional system configurations under OLTP-like workloads and sequential workloads. We believe that these results provide practical guidance for storage sub-system design.
Original language | English |
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Title of host publication | 2008 International Symposium on Performance Evaluation of Computer and Telecommunication Systems |
Publisher | Institute of Electrical and Electronics Engineers |
Pages | 464-471 |
Number of pages | 8 |
ISBN (Print) | 9781565553200 |
Publication status | Published - 2 Feb 2009 |
Event | 2008 International Symposium on Performance Evaluation of Computer and Telecommunication Systems - Edinburgh, United Kingdom Duration: 16 Jun 2008 → 18 Jun 2008 http://atc.udg.edu/SPECTS2008/ |
Conference
Conference | 2008 International Symposium on Performance Evaluation of Computer and Telecommunication Systems |
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Abbreviated title | SPECTS 2008 |
Country/Territory | United Kingdom |
City | Edinburgh |
Period | 16/06/08 → 18/06/08 |
Internet address |
Keywords / Materials (for Non-textual outputs)
- Back-end network
- RAID
- Scalability
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