Re: With 4 disks should I go for RAID 5 or RAID 10

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Mark Mielke Wrote:

>In my experience, software RAID 5 is horrible. Write performance can
>decrease below the speed of one disk on its own, and read performance will
>not be significantly more than RAID 1+0 as the number of stripes has only
>increased from 2 to 3, and if reading while writing, you will not get 3X as
>RAID 5 write requires at least two disks to be involved. I believe hardware
>RAID 5 is also horrible, but since the hardware hides it from the
>application, a hardware RAID 5 user might not care.

>Software RAID 1+0 works fine on Linux with 4 disks. This is the setup I use
>for my personal server.

I will use software RAID so RAID 1+0 seems to be the obvious choice.
Thanks for the advice!



---------------------------(end of broadcast)---------------------------
TIP 3: Have you checked our extensive FAQ?

               http://www.postgresql.org/docs/faq

[Postgresql General]     [Postgresql PHP]     [PHP Users]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Yosemite]

  Powered by Linux