dd 명령으로 Storage I/O 성능 확인

 

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테스트한 날짜:  2023년 2월 20일

 

 

 

DD 명령으로 Storage I/O 성능 확인

 

############################################################################
## 쓰기(output) 성능 확인
############################################################################

## Case: 저장 장치의 Cache memory(즉, Buffer memory)를 사용하는 경우
$ dd if=/dev/zero bs=1024 count=5000 of=/mnt/hdd1/my_test_file
5000+0 records in
5000+0 records out
5120000 bytes (5.1 MB, 4.9 MiB) copied, 0.0113672 s, 450 MB/s
$

## Case: 저장 장치의 Cache memory(즉, Buffer memory)를 사용하지 않는 경우,
##       oflag=direct  옵션을 추가한다.
$ dd if=/dev/zero bs=1024 count=5000 of=/mnt/hdd1/my_test_file oflag=direct
5000+0 records in
5000+0 records out
5120000 bytes (5.1 MB, 4.9 MiB) copied, 0.23691 s, 21.6 MB/s


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## 읽기(input) 성능 확인
############################################################################

$ dd if=/mnt/hdd1/my_test_file of=/dev/null bs=1024
5000+0 records in
5000+0 records out
5120000 bytes (5.1 MB, 4.9 MiB) copied, 0.0123259 s, 415 MB/s
$

 

 

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