'sata'에 해당되는 글 1건
2011. 1. 25. 20:09
[서버관련]
FreeBSD 에서 diskinfo 툴로 돌린값을 비교해보았습니다.
SSD 하드가 단편화문제와 빈번한 read/write에서 수명문제가 있긴하지만
빠르긴하네요..
Seek time 에서는 비교가 안되고, 당연한 결과겠지만 SSD에서는 seek time이
모든 영역에서 동일한 시간을 보이네요..
두서버 모두 raid1 으로 512M cache메모리의 고성능 raid 콘트롤러를 장착하였습니다.
SSD 하드서버
Seek times:
Full stroke: 250 iter in 0.031215 sec = 0.125 msec
Half stroke: 250 iter in 0.031156 sec = 0.125 msec
Quarter stroke: 500 iter in 0.062460 sec = 0.125 msec
Short forward: 400 iter in 0.049768 sec = 0.124 msec
Short backward: 400 iter in 0.050074 sec = 0.125 msec
Seq outer: 2048 iter in 0.262656 sec = 0.128 msec
Seq inner: 2048 iter in 0.251811 sec = 0.123 msec
Transfer rates:
outside: 102400 kbytes in 0.494756 sec = 206971 kbytes/sec
middle: 102400 kbytes in 0.492494 sec = 207921 kbytes/sec
inside: 102400 kbytes in 0.496554 sec = 206221 kbytes/sec
Seek times:
Full stroke: 250 iter in 0.031215 sec = 0.125 msec
Half stroke: 250 iter in 0.031156 sec = 0.125 msec
Quarter stroke: 500 iter in 0.062460 sec = 0.125 msec
Short forward: 400 iter in 0.049768 sec = 0.124 msec
Short backward: 400 iter in 0.050074 sec = 0.125 msec
Seq outer: 2048 iter in 0.262656 sec = 0.128 msec
Seq inner: 2048 iter in 0.251811 sec = 0.123 msec
Transfer rates:
outside: 102400 kbytes in 0.494756 sec = 206971 kbytes/sec
middle: 102400 kbytes in 0.492494 sec = 207921 kbytes/sec
inside: 102400 kbytes in 0.496554 sec = 206221 kbytes/sec
SATA 하드서버
Seek times:
Full stroke: 250 iter in 1.477391 sec = 5.910 msec
Half stroke: 250 iter in 1.423015 sec = 5.692 msec
Quarter stroke: 500 iter in 2.953463 sec = 5.907 msec
Short forward: 400 iter in 1.703787 sec = 4.259 msec
Short backward: 400 iter in 1.731393 sec = 4.328 msec
Seq outer: 2048 iter in 0.489363 sec = 0.239 msec
Seq inner: 2048 iter in 0.382542 sec = 0.187 msec
Transfer rates:
outside: 102400 kbytes in 0.889493 sec = 115122 kbytes/sec
middle: 102400 kbytes in 0.887746 sec = 115348 kbytes/sec
inside: 102400 kbytes in 0.901085 sec = 113641 kbytes/sec
Seek times:
Full stroke: 250 iter in 1.477391 sec = 5.910 msec
Half stroke: 250 iter in 1.423015 sec = 5.692 msec
Quarter stroke: 500 iter in 2.953463 sec = 5.907 msec
Short forward: 400 iter in 1.703787 sec = 4.259 msec
Short backward: 400 iter in 1.731393 sec = 4.328 msec
Seq outer: 2048 iter in 0.489363 sec = 0.239 msec
Seq inner: 2048 iter in 0.382542 sec = 0.187 msec
Transfer rates:
outside: 102400 kbytes in 0.889493 sec = 115122 kbytes/sec
middle: 102400 kbytes in 0.887746 sec = 115348 kbytes/sec
inside: 102400 kbytes in 0.901085 sec = 113641 kbytes/sec
