[Sysadmins] Лучшний RAID?

[Gennadii Redko]

Michael Shigorin пишет:

> 
> ==> bonnie-raid10-64k-xfs.log <==
> Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
>                     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
> Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
> gig              4G 45448  98 142184  21 45937  13 48763  95 167759  25 533.6   1
>                     ------Sequential Create------ --------Random Create--------
>                     -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
>               files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
>                  16  2815  19 +++++ +++  9311  52  5999  32 +++++ +++  4755  32
> gig,4G,45448,98,142184,21,45937,13,48763,95,167759,25,533.6,1,16,2815,19,+++++,+++,9311,52,5999,32,+++++,+++,4755,32
> 
> ==> bonnie-raid5-64k-xfs.log <==
> Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
>                     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
> Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
> gig              4G 39882  89 46028   9 22759   8 44967  92 204721  61 418.3   1
>                     ------Sequential Create------ --------Random Create--------
>                     -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
>               files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
>                  16  1170   2 +++++ +++  1263   2  1425   2 +++++ +++   987   2
> gig,4G,39882,89,46028,9,22759,8,44967,92,204721,61,418.3,1,16,1170,2,+++++,+++,1263,2,1425,2,+++++,+++,987,2
> 
А в чем смысл переезда на 10-ку для ftp-сервера?
Ведь потоковое чтение 167759  на 10-ке против 204721 - на 5-ке.
Меньше 50% попадает в кэш?