RAID10 (146G*8) vs EMC VNX 5300 (8G Fibre Channel)

RAID10 (146G*8) vs EMC VNX 5300 (8G Fibre Channel)

服务器RAID卡带宽是6G，而Fibre Channel目前是8G，ISCSI与FCoE 可以提供 10G带宽，InfiniBand可以提供120G带宽。

# cat /etc/fstab 
LABEL=/                 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
LABEL=SWAP-sda3         swap                    swap    defaults        0 0
/dev/sda4               /home/oracle/rman       ext3    defaults        0 2
/dev/sdb1               /opt/oracle     ext3    defaults        0 2
/dev/emcpowerj1         /u02                    ext3    defaults        0 0
			
# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2              95G  7.8G   82G   9% /
/dev/sda1             1.9G   42M  1.8G   3% /boot
tmpfs                  63G  534M   63G   1% /dev/shm
/dev/sda4             924G  619G  258G  71% /home/oracle/rman
/dev/sdb1             1.1T  309G  735G  30% /opt/oracle
/dev/emcpowerj1       296G   20G  261G   7% /u02
			

IBM X3850 G5

# time dd if=/dev/zero of=file bs=1M count=100  
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.152702 seconds, 687 MB/s

real	0m0.154s
user	0m0.001s
sys	0m0.153s
# time dd if=/dev/zero of=file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 1.6589 seconds, 632 MB/s

real	0m1.710s
user	0m0.009s
sys	0m1.657s

# time dd if=/dev/zero of=file bs=1G count=2    
2+0 records in
2+0 records out
2147483648 bytes (2.1 GB) copied, 3.48809 seconds, 616 MB/s

real	0m5.899s
user	0m0.000s
sys	0m5.594s
			

EMC

# time dd if=/dev/zero of=file bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.175535 seconds, 597 MB/s

real	0m0.178s
user	0m0.001s
sys	0m0.171s
# time dd if=/dev/zero of=file bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 1.67429 seconds, 626 MB/s

real	0m1.718s
user	0m0.002s
sys	0m1.664s
# time dd if=/dev/zero of=file bs=1G count=2
2+0 records in
2+0 records out
2147483648 bytes (2.1 GB) copied, 3.46919 seconds, 619 MB/s

real	0m3.757s
user	0m0.002s
sys	0m3.656s