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另外我发现随着文件的增大似乎创建的时间也随着增多,而且不是线性增长,怎麼回事???
[root@Tester log]# dd if=/dev/zero of=emptyfile bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.491788 seconds, 213 MB/s
[root@Tester log]# dd if=/dev/zero of=emptyfile bs=1M count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 31.6226 seconds, 33.2 MB/s
/data # time dd if=/dev/zero of=emptyfile bs=1M count=100
100+0 records in
100+0 records out
real 0m 5.87s
user 0m 0.00s
sys 0m 3.34s
/data # time dd if=/dev/zero of=emptyfile bs=10M count=10
10+0 records in
10+0 records out
real 0m 6.58s
user 0m 0.00s
sys 0m 3.40s
/data # time dd if=/dev/zero of=emptyfile bs=100M count=1
1+0 records in
1+0 records out
real 0m 6.62s
user 0m 0.02s
sys 0m 3.36s
/data # time dd if=/dev/zero of=emptyfile bs=100k count=1000
1000+0 records in
1000+0 records out
real 0m 6.86s
user 0m 0.03s
sys 0m 3.70s
/data # time dd if=/dev/zero of=emptyfile bs=10k count=10000
10000+0 records in
10000+0 records out
real 0m 10.78s
user 0m 0.03s
sys 0m 4.83s
/data # time dd if=/dev/zero of=emptyfile bs=1M count=1000
1000+0 records in
1000+0 records out
real 1m 3.29s
user 0m 0.01s
sys 0m 33.57s |
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