I wonder , what will happen

tarek.box

I wonder ,

what will happen if i put this code

dd if=/dev/zero of=/dev/null bs=10G count=1 oflag=direct

in shell script pool if OPENVZ or KVM any one knows ?

DalComp

You will send spam to 100k random email addresses.

TheOnlyDK

I call 911 with that code, works every time.

linuxthefish

You can't use oflag=direct with /dev/null

Without it seems to work fine, here is for OpenVZ

[root@s /]# dd if=/dev/zero of=/dev/null bs=10G count=1
0+1 records in
0+1 records out
2147479552 bytes (2.1 GB) copied, 0.616502 s, 3.5 GB/s
[root@s /]# dd if=/dev/zero of=/dev/null bs=1G count=10
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 1.37971 s, 7.8 GB/s

perennate

Wow, what provider are you using?? That disk I/O is so high!

tarek.box

@linuxthefish

from where you buy your server ?

linuxthefish

@tarek4web said:
linuxthefish

from where you buy your server ?

It's not the real disk I/O, I think this uses CPU more than anything!

tarek.box

@linuxthefish

I have a curiosity to know from where you bought it ?

Nomad

@linuxthefish said:
It's not the real disk I/O, I think this uses CPU more than anything!

[11:31] root@loki: /home/nomad # dd if=/dev/zero of=/dev/null bs=10G count=1
0+1 records in
0+1 records out
2147479552 bytes (2.1 GB) copied, 0.54953 s, 3.9 GB/s
[11:42] root@loki: /home/nomad # dd if=/dev/zero of=/dev/null bs=1G count=10
10+0 records in
10+0 records out
10737418240 bytes (11 GB) copied, 1.37481 s, 7.8 GB/s

Not much of a difference with a 1220v2