TOE技术以及TOE网卡的工作原理

TOE技术以及TOE网卡的工作原理
TCP/IP协议早已是网络的标准语言。随着Internet SCSI、Remote Diret Memory Access这些网络存贮标准的问世和实用化,从某种意义上说,TCP/IP又成了一种存贮协议。 我们知道,用TCP/IP协议处理网络流量,要占用大量服务器资源。为了减轻服务器的压力,一种称为TCP减负引擎(TCP Offload Engine :TOE)的技术应运而生。TCP减负引擎一般由软硬两部分组件构成,将传统的TIP/IP协议栈的功能进行延伸,把网络数...

RAID10工作原理图解及特点分析

RAID10工作原理图解及特点分析
RAID 10: Very High Reliability combined with High Performance Characteristics/Advantages 1. RAID 10 is implemented as a striped array whose segments are RAID 1 arrays 2. RAID 10 has the same fault tolerance as RAID level 1 3. RAID 10 has the same overhead for fault-tolerance as mirroring alone 4. High I/O rates are achieved by striping RAID 1 segments 5. Under certain circum...

RAID7工作原理图解及特点分析

RAID7工作原理图解及特点分析
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...

RAID6工作原理图解及特点分析

RAID6工作原理图解及特点分析
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. Data is striped on a block level across a set of drives, just like in RAID 5, and a secon...

RAID5工作原理图解及特点分析

RAID5工作原理图解及特点分析
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 Disadvantages 1. Disk failure has a medium impact on throughput 2. Most complex controller design 3. Difficul...

RAID4工作原理图解及特点分析

RAID4工作原理图解及特点分析
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 controller design 2. Worst Write transaction rate and Write aggregate transfer rate 3. Difficult and inefficient dat...

RAID3工作原理图解及特点分析

RAID3工作原理图解及特点分析
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 means high efficiency Disadvantages 1. Transaction rate equal to that of a single disk drive at best (if spindles are synchronized...
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