日期：2007-12-04 | 分类：存储技术 | 阅读:9,350 | 2 个点评 » Tags: 存储控制器, 带宽, CACHE, IOPS, ISCSI |
今天发现存储人论坛上的网友robinson针对我的文章iSCSI存储技术全攻略提出了几个问题，呵呵，先对他对我文章的认可表示感谢，否则他不会提出这些问题。 他提出的问题如下： 1、每秒最大I/O 100,000 IOPS －－－－－－－－－－－－》IO多大？ 回答： 存储端的IOPS性能和主机端的IO是不同的，IOPS是指存...
日期：2007-08-04 | 分类：好文收藏 | 阅读:1,150 | 评论关闭 Tags: CACHE, 网络存储, EMC, 虚拟化, HDS, HDS-USP, IBM |
转载： cnpmc http://space.doit.com.cn/43519 HDS 在5月中旬正式发布了高端存储新产品: Universal Storage Platform. V (USP V)。这个产品应该只是 TagmaStore USP 的升级版，其定位是和 EMC 的高端存储 DMX－3 进行竞争，目前市场上也只有这两家在高端上有一拼，IBM 那用两个 p5 570 拼起来的盒子很多人都信不过。 看 官方介绍...
日期：2007-06-19 | 分类：基础知识 | 阅读:1,343 | 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
阅读全文 >>>
日期：2007-06-19 | 分类：基础知识 | 阅读:1,477 | 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
阅读全文 >>>
日期：2007-06-19 | 分类：基础知识 | 阅读:2,817 | 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:1,482 | 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:1,715 | 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:1,245 | 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:2,380 | 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:1,955 | 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
...
