日期：2007-07-01 | 分类：基础知识 | 阅读:2,046 | 1个点评 » Tags: 下载, 软件, IO, IOPS, oracle, 测试, 数据库 |
作者：piner 原地址： http://www.ixdba.com/html/y2007/m06/125-orion-storage-test.html orion，一款由Oracle公司提供，专门用于模拟数据库运行机制来测试存储的优秀IO存储测试软件，可以在不运行oracle数据库的情况下，仿真OLTP随机操作（测试IOPS）或者是OLAP连续性操作（测试吞吐量）。 先看看此软件的下载地址与说...
日期：2007-06-19 | 分类：基础知识 | 阅读:1,339 | 评论关闭 Tags: 工作原理, 图解, CACHE, IO, RAID, RAID7 |
RAID 7: Optimized Asynchrony for High I/O Rates as well as High Data Transfer Rates Architectural Features: 1. All I/O transfers are asynchronous, independently controlled and cached including host interface transfers 2. All reads and write are centrally cached via … Continue reading RAID 7: Optimized Asynchrony for High I/O Rates as well as High Data Transfer Rates
Architectural Features:
1. All I/O transfers are asynchronous, independently controlled and cached including host interface transfers
2. All reads and write are centrally cached via the high speed x-bus
3. Dedicated parity drive can be on any channel
4. Fully implemented process oriented real time operating system resident on embedded array control microprocessor
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日期：2007-06-19 | 分类：基础知识 | 阅读:1,469 | 评论关闭 Tags: 工作原理, 图解, CACHE, IO, RAID, RAID6 |
RAID 6: Independent Data disks with two independent distributed parity schemes Characteristics/Advantages 1. RAID 6 is essentially an extension of RAID level 5 which allows for additional fault tolerance by using a second independent distributed parity scheme (two-dimensional parity) 2. … Continue reading 6: Independent Data disks with two independent distributed parity schemes
Characteristics/Advantages
1. RAID 6 is essentially an extension of RAID level 5 which allows for additional fault tolerance by using a second independent distributed parity scheme (two-dimensional parity)
2. Data is striped on a block level across a set of drives, just like in RAID 5, and a second set of parity is calculated and written across all the drives; RAID 6 provides for an extremely high data fault tolerance and can sustain multiple simultaneous drive failures
3. Perfect solution for mission critical applications
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日期：2007-06-19 | 分类：基础知识 | 阅读:2,808 | 评论关闭 Tags: 工作原理, 图解, CACHE, IO, RAID, RAID5 |
RAID 5: Independent Data disks with distributed parity blocks Characteristics/Advantages 1. Highest Read data transaction rate 2. Medium Write data transaction rate 3. Low ratio of ECC (Parity) disks to data disks means high efficiency 4. Good aggregate transfer rate
...日期：2007-06-19 | 分类：基础知识 | 阅读:1,478 | 评论关闭 Tags: 工作原理, 图解, CACHE, IO, RAID, RAID4 |
RAID 4: Independent Data disks with shared Parity disk Characteristics/Advantages 1. Very high Read data transaction rate 2. Low ratio of ECC (Parity) disks to data disks means high efficiency 3. High aggregate Read transfer rate Disadvantages 1. Quite complex … Continue reading
...日期：2007-06-19 | 分类：基础知识 | 阅读:1,709 | 评论关闭 Tags: 工作原理, 图解, CACHE, IO, RAID, RAID3 |
RAID 3: Parallel transfer with parity Characteristics/Advantages 1. Very high Read data transfer rate 2. Very high Write data transfer rate 3. Disk failure has an insignificant impact on throughput 4. Low ratio of ECC (Parity) disks to data disks … Continue reading
...日期：2007-06-19 | 分类：基础知识 | 阅读:1,243 | 评论关闭 Tags: 工作原理, 图解, CACHE, IO, RAID, RAID2 |
RAID 2: Hamming Code ECC Characteristics/Advantages 1. “On the fly” data error correction 2. Extremely high data transfer rates possible 3. The higher the data transfer rate required, the better the ratio of data disks to ECC disks 4. Relatively … Continue reading
...日期：2007-06-19 | 分类：基础知识 | 阅读:2,375 | 评论关闭 Tags: 工作原理, 图解, CACHE, IO, RAID, RAID1 |
RAID1: Mirroring and Duplexing Characteristics/Advantages 1. One Write or two Reads possible per mirrored pair 2. Twice the Read transaction rate of single disks, same Write transaction rate as single disks 3. 100% redundancy of data means no rebuild is … Continue reading
...日期：2007-06-19 | 分类：基础知识 | 阅读:1,949 | 2 个点评 » Tags: 工作原理, 图解, CACHE, IO, RAID, RAID0 |
RAID 0: Striped Disk Array without Fault Tolerance Characteristics/Advantages 1. RAID 0 implements a striped disk array, the data is broken down into blocks and each block is written to a separate disk drive 2. I/O performance is greatly improved … Continue reading
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