Transfer Rate Disk Post: 302504506

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Top Forums UNIX for Dummies Questions & Answers Transfer Rate Disk Post 302504506 by karlochacon on Monday 14th of March 2011 07:09:20 PM

03-14-2011

Registered User

i have to take a closer look since I did not get the idea just reading it Smilie

Quote:

Originally Posted by Corona688

Since this is Linux, if you send a SIGUSR1 to dd while it's in operation, it will print statistics to standard error.

Code:

# useless:  read /dev/zero, write /dev/null, in blocks of one megabyte
$ dd if=/dev/zero of=/dev/null bs=1048576 &
[1] 25076
$ killall -USR1 dd
4115+1 records in
4115+0 records out
4314890240 bytes (4.3 GB) copied, 2.38339 s, 1.8 GB/s
$ killall dd
[1]+  Terminated              dd if=/dev/zero of=/dev/null bs=1048576
$

It will also print a summary to standard error when it completes.

You may want to add "oflag=sync" to prevent cache effects from messing up your numbers.

karlochacon

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