面向非易失存储器外存系统的缓存机制
发布时间：2018-07-13 19:04
【摘要】：非易失存储器具有接近于DRAM的访问速度,是构建高性能外存系统和提高大数据系统性能的重要手段,但非易失存储器存在写次数有限和写能耗较高等问题.本文引入缓存技术,使用写缓存合并对同一数据的多次写操作,减少对非易失存储器的写次数;使用原始缓存减少写回非易失存储器的数据量;设计了写缓存混合粒度管理算法、双缓存协调算法和缓存空间协调策略,减少了非易失存储器的写数据量,增加外存系统的使用寿命,降低了外存系统能耗,提高了I/O性能.最后在开源基于对象存储设备Open-osd上,实现了面向非易失存储器外存系统缓存机制的原型,使用存储系统通用测试工具Filebench和Postmark、以及多个通用数据集进行了测试与分析,验证了面向非易失存储器外存系统缓存机制能减少21%~77%的外存写数据量,提高了8%~37%的I/O性能,检验了面向非易失存储器外存系统缓存机制的有效性.
[Abstract]:Non-volatile memory has access speed close to that of big data, which is an important means to build high-performance external memory system and improve the performance of big data system. However, non-volatile memory has some problems such as limited write times and high write energy consumption. In this paper, the cache technology is introduced, the write cache is used to merge the multiple write operations to the same data, the number of writes to the non-volatile memory is reduced, the original cache is used to reduce the amount of data written back to the non-volatile memory. The hybrid granularity management algorithm of write cache, double cache coordination algorithm and cache space coordination strategy are designed, which can reduce the amount of write data of non-volatile memory, increase the service life of external memory system, reduce the energy consumption of external memory system, and improve the performance of I / O. Finally, an open source object based storage device, Open-osd, is implemented to realize the prototype of memory cache mechanism for non-volatile memory system. The memory system general testing tools Filebench and Postmarkand several common data sets are used to test and analyze. It is verified that the buffer mechanism of the non-volatile memory system can reduce the external memory and write data by 21% or 77%, improve the I / O performance of 8% / 37%, and verify the effectiveness of the buffer mechanism for the non-volatile memory system.
【作者单位】： 江苏大学计算机科学与通信工程学院;深圳信息职业技术学院信息中心;
【基金】：广东省自然科学基金项目(S2011010006118)资助 江苏省高校自然科学基金项目(09KJB520001)资助
【分类号】：TP333
[Abstract]:Non-volatile memory has access speed close to that of big data, which is an important means to build high-performance external memory system and improve the performance of big data system. However, non-volatile memory has some problems such as limited write times and high write energy consumption. In this paper, the cache technology is introduced, the write cache is used to merge the multiple write operations to the same data, the number of writes to the non-volatile memory is reduced, the original cache is used to reduce the amount of data written back to the non-volatile memory. The hybrid granularity management algorithm of write cache, double cache coordination algorithm and cache space coordination strategy are designed, which can reduce the amount of write data of non-volatile memory, increase the service life of external memory system, reduce the energy consumption of external memory system, and improve the performance of I / O. Finally, an open source object based storage device, Open-osd, is implemented to realize the prototype of memory cache mechanism for non-volatile memory system. The memory system general testing tools Filebench and Postmarkand several common data sets are used to test and analyze. It is verified that the buffer mechanism of the non-volatile memory system can reduce the external memory and write data by 21% or 77%, improve the I / O performance of 8% / 37%, and verify the effectiveness of the buffer mechanism for the non-volatile memory system.
【作者单位】： 江苏大学计算机科学与通信工程学院;深圳信息职业技术学院信息中心;
【基金】：广东省自然科学基金项目(S2011010006118)资助 江苏省高校自然科学基金项目(09KJB520001)资助
【分类号】：TP333
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