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发表于 2008-07-03 14:57 |只看该作者 |倒序浏览

d40: Mirror
Submirror 0: d41
   State: Okay
Submirror 1: d42
   State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 285202752 blocks

d41: Submirror of d40
State: Okay
Size: 285202752 blocks
Stripe 0:
      Device             Start Block  Dbase State       Hot Spare
      c2t10d0s0                0    No Okay
Stripe 1:
      Device             Start Block  Dbase State       Hot Spare
      c2t11d0s0             10176    No Okay

d42: Submirror of d40
State: Okay
Size: 285202752 blocks
Stripe 0:
      Device             Start Block  Dbase State       Hot Spare
      c2t12d0s0                0    No Okay
Stripe 1:
      Device             Start Block  Dbase State       Hot Spare
      c2t13d0s0             10176    No Okay
和

d40: Mirror
Submirror 0: d41
   State: Okay
Submirror 1: d42
   State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 285202752 blocks

d41: Submirror of d40
State: Okay
Size: 285202752 blocks
Stripe 0:
      Device             Start Block  Dbase State       Hot Spare
      c2t10d0s0                0    No Okay
      c2t11d0s0             10176    No Okay

d42: Submirror of d40
State: Okay
Size: 285202752 blocks
Stripe 0:
      Device             Start Block  Dbase State       Hot Spare
      c2t12d0s0                0    No Okay
      c2t13d0s0             10176    No Okay

有什么区别，有什么好处？

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yuhuohu

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2楼 [报告]

发表于 2008-07-03 20:58 |只看该作者

都是 raid 0＋1

底层的raid 0实现方式不同

up是串接方式，
两个盘串成d41，两个盘串成d42，然后d41，d42做镜像

down是条带方式
d42
Stripe 0:
      Device             Start Block  Dbase State       Hot Spare
      c2t12d0s0                0    No Okay
      c2t13d0s0             10176    No Okay

两个盘先组成条带，变成d42，d41，再镜像成d40

从性能角度看，后面一种好

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SDS 的stripe疑问 [复制链接]