一种磁盘阵列系统箱体服务软件的设计与实现
发布时间：2019-03-30 16:49
【摘要】：存储技术正发生着革命性的变化,这种变化主要表现在三个方面：首先是存储容量的急剧膨胀。其次是数据就绪时间的延展。最后,数据存储的结构不同了。这就对数据存储设备提出了很高的要求,磁盘阵列系统作为核心存储设备,其可靠性,可管理性直接影响到整个系统的性能和稳定性。 本文设计实现了一种基于新一代中高端磁盘阵列存储系统的箱体服务软件。在作者研究IBM公司上一代磁盘阵列存储系统产品的过程中,发现了其存在的几点不足之处,比如硬件成本太高、双控制器间通信效率低下、SCSI箱体服务诊断页支持较少等。本文围绕这些问题做了如下几点改进： 1.上一代产品采用光纤总线(FC),前端、后端、包括硬盘都是光纤接口设备,硬件成本非常高。本项目前端仍然使用光纤接口,但是后端和硬盘接口使用SAS[1][2]技术,在不牺牲性能和稳定性的情况下,有效地降低了硬件成本,极大地提高了产品性价比。 2.双SAS扩展器间利用串口(UART)通信。重新设计了通信协议模型,支持全双工,提高了板间通信的稳定性和效率。上一代产品使用I2C总线[3]通信,有时会出现总线数据收发冲突和死锁。尤其是在系统初始化阶段,I2C总线上读写操作比较频繁,出现冲突的概率比较大。 3.支持较为完善的SCSI箱体服务(SCSI Enclosure Service, SES)[4]诊断页。不仅支持规范中明确要求必须要支持的诊断页,也支持一些可选的诊断页。因此主机端可以获取更多磁盘阵列的信息,同时可以使用更多的诊断页控制磁盘阵列。 4.重新设计风扇控制算法,相较上一代产品更为稳定。.在室温下风速不会频繁大幅度变化。在测试环境中,风扇转速对于温度的变化也较为灵敏。 5.支持更多的箱体事件和SES元素指示器(LED)。设计实现了一种新的指示器控制模型,理论上可以通过该方法在有限的硬件指示器条件下支持无限多的软件指示器。 本文通过对以上几点内容的研究和实现,保证了该磁盘阵列系统性能的稳定和功能的完善。经过作者前期的理论分析、大量的编码实践和长期的设备现场调试,对该系列产品缺陷的改进做出了先进性和实用性的研究。
[Abstract]:Storage technology is undergoing revolutionary changes, which are mainly manifested in three aspects: first, the rapid expansion of storage capacity. The second is the extension of the data ready time. Finally, the structure of data storage is different. As the core storage device, the reliability and manageability of disk array system directly affect the performance and stability of the whole system. In this paper, a box service software based on a new generation of high-end disk array storage system is designed and implemented. During the research of IBM's previous generation of disk array storage system products, the author has found some shortcomings, such as high hardware cost, low communication efficiency between dual controllers, less support for SCSI box service diagnosis pages, and so on. The following improvements have been made in this paper: 1. The previous generation of products use fiber-optic bus (FC), front-end, back-end, including hard drives are fiber-optic interface devices, the cost of hardware is very high. The front end of the project still uses fiber-optic interface, but the back-end and hard disk interface use SAS [1] [2] technology, without sacrificing performance and stability, the hardware cost is effectively reduced and the price-to-performance ratio of the product is greatly improved. 2. The dual SAS extender uses the serial port (UART) communication. The communication protocol model is redesigned to support full duplex and improve the stability and efficiency of inter-board communication. Previous generation products use I2C bus [3] to communicate, sometimes bus data receive and receive conflicts and deadlock. Especially in the initialization phase of the system, the read-write operation on I 2C bus is more frequent and the probability of conflict is high. 3. Support for more complete SCSI box service (SCSI Enclosure Service, SES) [4] diagnostic pages. Supports not only diagnostic pages that are explicitly required to be supported in the specification, but also optional diagnostic pages. So the host side can get more information about the disk array and more diagnostic pages can be used to control the disk array. 4. Re-design fan control algorithm, more stable than the previous generation of products. The wind speed does not change significantly at room temperature. In the test environment, the fan speed is also sensitive to the change of temperature. 5. Support for more box events and SES element indicator (LED). A new indicator control model is designed and implemented. In theory, the method can support unlimited number of software indicators under the limited hardware indicator condition. In this paper, the stability and function of the disk array system are guaranteed by the research and implementation of the above-mentioned contents. Based on the theoretical analysis of the author, a large number of coding practices and long-term field debugging of equipment, the advanced and practical research on the improvement of the defects of this series of products has been made.
【学位授予单位】：复旦大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP333
本文编号：2450285
[Abstract]:Storage technology is undergoing revolutionary changes, which are mainly manifested in three aspects: first, the rapid expansion of storage capacity. The second is the extension of the data ready time. Finally, the structure of data storage is different. As the core storage device, the reliability and manageability of disk array system directly affect the performance and stability of the whole system. In this paper, a box service software based on a new generation of high-end disk array storage system is designed and implemented. During the research of IBM's previous generation of disk array storage system products, the author has found some shortcomings, such as high hardware cost, low communication efficiency between dual controllers, less support for SCSI box service diagnosis pages, and so on. The following improvements have been made in this paper: 1. The previous generation of products use fiber-optic bus (FC), front-end, back-end, including hard drives are fiber-optic interface devices, the cost of hardware is very high. The front end of the project still uses fiber-optic interface, but the back-end and hard disk interface use SAS [1] [2] technology, without sacrificing performance and stability, the hardware cost is effectively reduced and the price-to-performance ratio of the product is greatly improved. 2. The dual SAS extender uses the serial port (UART) communication. The communication protocol model is redesigned to support full duplex and improve the stability and efficiency of inter-board communication. Previous generation products use I2C bus [3] to communicate, sometimes bus data receive and receive conflicts and deadlock. Especially in the initialization phase of the system, the read-write operation on I 2C bus is more frequent and the probability of conflict is high. 3. Support for more complete SCSI box service (SCSI Enclosure Service, SES) [4] diagnostic pages. Supports not only diagnostic pages that are explicitly required to be supported in the specification, but also optional diagnostic pages. So the host side can get more information about the disk array and more diagnostic pages can be used to control the disk array. 4. Re-design fan control algorithm, more stable than the previous generation of products. The wind speed does not change significantly at room temperature. In the test environment, the fan speed is also sensitive to the change of temperature. 5. Support for more box events and SES element indicator (LED). A new indicator control model is designed and implemented. In theory, the method can support unlimited number of software indicators under the limited hardware indicator condition. In this paper, the stability and function of the disk array system are guaranteed by the research and implementation of the above-mentioned contents. Based on the theoretical analysis of the author, a large number of coding practices and long-term field debugging of equipment, the advanced and practical research on the improvement of the defects of this series of products has been made.
【学位授予单位】：复旦大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP333
【共引文献】
相关期刊论文 前1条
1 胡晓飞;;公安天网视频监控业务存储技术研究[J];通信与信息技术;2014年05期
，本文编号：2450285
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