Characterization of OLTP I/O Workloads for Dimensioning Embedded Write Cache for Flash Memories: A Case Study

Jalil Boukhobza 1, * Ilyes Khetib 1 Pierre Olivier 1
* Corresponding author
1 Lab-STICC_UBO_CACS_MOCS
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance, UBO - Université de Brest
Abstract : More and more enterprise servers storage systems are migrating toward flash based drives (Solid State Drives) thanks to their attractive characteristics. They are lightweight, power efficient and supposed to outperform traditional disks. The two main constraints of flash memories are: 1) the limited number of achievable write operations beyond which a given cell can no more retain data, and 2) the erase-before-write rule decreasing the write performance. A RAM cache can help to reduce this problem; they are mainly used to increase performance and lifetime by absorbing flash write operations. RAM caches being very costly, their dimensioning is critical. In this paper, we explore some OLTP I/O workload characteristics with regards to flash memory cache systems structure and configuration. We try, throughout I/O workload analysis to reveal some important elements to take into account to allow a good dimensioning of those embedded caches.
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https://hal.univ-brest.fr/hal-00628529
Contributor : Jalil Boukhobza <>
Submitted on : Monday, October 3, 2011 - 3:22:31 PM
Last modification on : Monday, February 25, 2019 - 3:14:10 PM

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  • HAL Id : hal-00628529, version 1

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Jalil Boukhobza, Ilyes Khetib, Pierre Olivier. Characterization of OLTP I/O Workloads for Dimensioning Embedded Write Cache for Flash Memories: A Case Study. International Conference on Model and Data Engineering, Sep 2011, Obidos, Portugal. pp.97. ⟨hal-00628529⟩

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