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[root@testssd ~]# for i in {1..5}; do dd if=/dev/zero of=/tmp/test1 bs=1M count=1000; done/ ^: g# _$ Q C& `: ~- p) D$ y! O1 b3 \
1000+0 records in2 m3 a& u) D) \; {: O, _9 ~' _
1000+0 records out
6 J* R; B4 }1 _, E* T& C f1048576000 bytes (1.0 GB) copied, 6.32163 s, 166 MB/s
. ^4 x, S$ B4 b3 c! }4 Y1000+0 records in
% _ O) w4 c! ~6 o( Y1000+0 records out; G' u0 \- v p' f3 ~
1048576000 bytes (1.0 GB) copied, 5.44758 s, 192 MB/s
/ o, z) {+ v+ o9 r4 ?6 y1000+0 records in
9 s5 C. p' Y, x' i- V z1000+0 records out
5 F2 v! T/ P* \" g1 I1048576000 bytes (1.0 GB) copied, 6.76302 s, 155 MB/s
* r1 |+ ` ?1 ~( D1000+0 records in
: b" H" e% u! q" f8 \1000+0 records out3 p- o- b* {0 ]9 U& j3 ^; G: I' }
1048576000 bytes (1.0 GB) copied, 9.26751 s, 113 MB/s: n b! \' q$ f& o3 v- w& K
1000+0 records in
) s! [' r. @ Z+ H$ h1000+0 records out- }$ ]3 g) ~8 p. z: y
1048576000 bytes (1.0 GB) copied, 8.68525 s, 121 MB/s
) F) Q6 @2 O/ U: C/ Y# ?[root@testssd ~]# for i in {1..5}; do dd if=/dev/zero of=/nfstest/test1 bs=1M count=1000; done1 p- f. O" w" f' O
dd: failed to open ‘/nfstest/test1’: No such file or directory; C2 M( m2 ?7 c, [
dd: failed to open ‘/nfstest/test1’: No such file or directory$ g5 e5 a7 j6 s" `3 U) u9 R. l
dd: failed to open ‘/nfstest/test1’: No such file or directory5 h) h1 t& ^" q+ K: G6 _/ u: s+ ?1 }
dd: failed to open ‘/nfstest/test1’: No such file or directory# i; B) ?* M' V% L
dd: failed to open ‘/nfstest/test1’: No such file or directory K. b* [; g9 Y1 G
[root@testssd ~]# mkdir /nfstest3 n) @% Y7 C- P( K# L# I: m( Q
[root@testssd ~]# for i in {1..5}; do dd if=/dev/zero of=/nfstest/test1 bs=1M count=1000; done
( v' C/ ?1 r0 {/ ^* P5 l! t# |! H3 ^1000+0 records in V B+ R2 P/ N4 J- l5 d
1000+0 records out8 n$ P- g# F4 H7 S; u$ `- z0 u
1048576000 bytes (1.0 GB) copied, 10.9929 s, 95.4 MB/s
2 W; K3 O+ X% T8 ~5 W. @8 s k3 N6 G1000+0 records in
( s! A( D! e+ _: R: m' c1 M1000+0 records out3 t7 A6 R- a4 k- J7 q
1048576000 bytes (1.0 GB) copied, 9.55931 s, 110 MB/s
: x) J) P4 V7 x% X) I1000+0 records in
, i# ?" h4 b. r H9 V: S$ K1000+0 records out$ Y, N# \. [6 c
1048576000 bytes (1.0 GB) copied, 10.4851 s, 100 MB/s0 a2 O, C5 V$ P3 N0 J
1000+0 records in
1 Z7 Z/ ~6 L, L; t& T% v1000+0 records out
( k6 _+ N: M. B4 w6 ]1048576000 bytes (1.0 GB) copied, 10.3672 s, 101 MB/s
2 F$ `% Q! R5 [1 N, s. H1000+0 records in4 i# [; {, N) P3 o# S0 e& D0 ~: d
1000+0 records out" Q& r7 e1 x, I# } c
1048576000 bytes (1.0 GB) copied, 10.7387 s, 97.6 MB/s. m$ }% z. r) E1 o: U! G
[root@testssd ~]# for i in {1..5}; do dd if=/dev/zero of=/tmp/test1 bs=1M count=1000 iflag=direct; done
3 i7 F* r& N" F& _0 w" P( Ndd: failed to open ‘/dev/zero’: Invalid argument* R) E" @. W2 d, i: G: w
dd: failed to open ‘/dev/zero’: Invalid argument/ I& G p7 B0 O* X9 T$ V
dd: failed to open ‘/dev/zero’: Invalid argument( G) E5 B' j- e2 y5 `' L' }' p7 L
dd: failed to open ‘/dev/zero’: Invalid argument8 X$ o* c- R# L7 x( n3 n3 h
dd: failed to open ‘/dev/zero’: Invalid argument
D' y9 O* B$ Q' d% X) Z[root@testssd ~]# for i in {1..5}; do dd of=/dev/null if=/tmp/test1 bs=1M count=1000; done k& V% Q. [% u( A# s& F$ A
1000+0 records in2 K5 x/ w1 U, J& k S& G
1000+0 records out- L, |* a' `0 `. D. o2 ^
1048576000 bytes (1.0 GB) copied, 1.56524 s, 670 MB/s
: n# Q7 s" [; O7 D9 x$ ]1000+0 records in( l" R. M4 v$ U. u
1000+0 records out. v" F, c5 Y5 j( }% b! v3 Q: W0 d
1048576000 bytes (1.0 GB) copied, 0.17828 s, 5.9 GB/s
; W l; ]8 s' A* q; |1000+0 records in6 k/ b: F9 \7 f8 I. c
1000+0 records out2 a" K& W9 y1 S$ K% ]# K
1048576000 bytes (1.0 GB) copied, 0.196089 s, 5.3 GB/s q5 g; i" E" ]' j7 }' y3 K
1000+0 records in% g+ G0 i1 y6 W( |2 ^$ W2 l
1000+0 records out
& I& v9 j) W. W1048576000 bytes (1.0 GB) copied, 0.590726 s, 1.8 GB/s
X( s& ]# k' S3 R* \: p& L g' ]6 s1000+0 records in E5 `$ ~$ N) J {
1000+0 records out$ }0 w6 U+ d! |8 d& u
1048576000 bytes (1.0 GB) copied, 0.219955 s, 4.8 GB/s, ^7 c# X( E2 U7 p: Z+ q
[root@testssd ~]# 0 |$ n; m7 p% g* h# G( ]
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发表于 2022-6-16 11:12:02