vps

事实证明Linode无愧于众多业界人士对其的推崇，今天实测了一下其磁盘速度真的不俗:

[root@li229-25 ~]# hdparm -tT /dev/xvda

/dev/xvda:
 Timing cached reads:   25536 MB in  1.99 seconds = 12843.60 MB/sec
 Timing buffered disk reads:  340 MB in  3.00 seconds = 113.20 MB/sec

[root@li229-25 ~]# dd if=/dev/xvda of=/root/dump bs=1024k count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 18.9223 seconds, 55.4 MB/s

以上为Linode vps的成绩，dd的速度为55MB/s

一下为笔者的台式机电脑，使用普通的西数硬盘

[root@rh2 ~]# cat /proc/scsi/scsi 
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: WDC WD3200AAJS-0 Rev: 01.0
  Type:   Direct-Access                    ANSI SCSI revision: 05

[root@rh2 ~]# hdparm -Tt /dev/sda

/dev/sda:
 Timing cached reads:   9132 MB in  2.00 seconds = 4569.83 MB/sec
 Timing buffered disk reads:  306 MB in  3.01 seconds = 101.72 MB/sec
[root@rh2 ~]# dd if=/dev/sda of=/root/dump bs=1024k count=1000  
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 22.6009 seconds, 46.4 MB/s

Linode虚拟服务器的磁盘速度略优于普通pc的磁盘速度，作为vps性能还是不错的；
如果作为网页服务器的话，结合memcached等缓存技术，一般来说IO性能不会成为主要瓶颈。

Linode vps磁盘速度实测