[GTER] Performance hd

[Glaucio Rocha - 001hosting.com.br]

Pessoal,

Comparando com o SCSI o SAS chegou para reinar:

DELL POWEREDGE 1950 - HD SAS DE 300 GB RAID 1 - 4 GB RAM

hdparm -Tt
/dev/sda:
 Timing cached reads:   10592 MB in  2.00 seconds = 5302.11 MB/sec
 Timing buffered disk reads:  256 MB in  3.01 seconds =  85.01 MB/sec

Abraços,

Glaucio Rocha
001hosting.com.br
0800-701-8001

----- Original Message ----- 
From: "System Admin" <system-admin at grupora.com.br>
To: "'Grupo de Trabalho de Engenharia e Operacao de Redes'" 
<gter at eng.registro.br>
Sent: Tuesday, October 31, 2006 3:33 PM
Subject: [GTER] Performance hd


Pessoal,

Realizei um pequeno teste com o "hdparm -Tt" e me deparei com uma situação
interessante que o SATA  demonstra-se uma boa opção.
Embora seja um ambiente de produção, máquinas muito diferentes e um teste
muito simples veja abaixo.

==========================================================================
2 processadores Xeon 3.33GHz    - 16GB RAM     -  dell powered 6850
 scssi interno
/dev/sda:
 Timing buffer-cache reads:   2800  MB in  2.00 seconds = 1399.51 MB/sec
 Timing buffered disk reads:  208    MB in   3.02 seconds =   68.93 MB/sec

Fibre Channel HD
/dev/sdd:
 Timing buffer-cache reads:   2900 MB in  2.00 seconds = 1450.22 MB/sec
 Timing buffered disk reads:  180 MB in  3.01 seconds =  59.79 MB/sec
==========================================================================
Pentium 4  2.80GHz    512MB Ram   dell
SATA
/dev/sda:
 Timing cached reads:   4124 MB in  2.00 seconds = 2061.28 MB/sec
 Timing buffered disk reads:  146 MB in  3.02 seconds =  54.42 MB/sec
==========================================================================
Pentium II 333 MHZ  96MB RAM
IDE
Timing cached reads:   332 MB in  2.01 seconds = 165.17 MB/sec
Timing buffered disk reads:   12 MB in  3.31 seconds =   3.63 MB/sec
==========================================================================


Abraços


Geraldo Coelho



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