IT分销/经销aix 6
dd的上限
dd是不是有SIZE的上限？
# dd if=/dev/zero of=/home/lz/b bs=1024 count=10000000
dd: 0511-065 Requested a write of 1024 bytes, but wrote only 512.
# ls -alt
total 2097160
-rw-r--r-- 1 root system 1073741312 Feb 26 16:53 b
drwxr-xr-x 3 root system 256 Feb 26 16:51 .
drwxr-xr-x 6 bin bin 256 Feb 26 16:47 ..
-rw-r--r-- 1 root system 41 Feb 24 17:50 a.txt
drwxr-xr-x 2 root system 256 Feb 24 17:46 lost+found
# cat /etc/security/limits
*
default:
fsize = -1
core = 2097151
cpu = -1
data = 262144
rss = 65536
stack = 65536
nofiles = 2000
# dd if=/dev/zero of=/home/lz/b bs=1024 count=10000000
dd: 0511-065 Requested a write of 1024 bytes, but wrote only 512.
# ls -alt
total 2097160
-rw-r--r-- 1 root system 1073741312 Feb 26 16:53 b
drwxr-xr-x 3 root system 256 Feb 26 16:51 .
drwxr-xr-x 6 bin bin 256 Feb 26 16:47 ..
-rw-r--r-- 1 root system 41 Feb 24 17:50 a.txt
drwxr-xr-x 2 root system 256 Feb 24 17:46 lost+found
# cat /etc/security/limits
*
default:
fsize = -1
core = 2097151
cpu = -1
data = 262144
rss = 65536
stack = 65536
nofiles = 2000
5同行回答
回复 1# OPS911
谢谢回答小白问题，登出用户重新登录后可以了。
# ulimit -a
core file size (blocks, -c) 1048575
data seg size (kbytes, -d) 131072
file size (blocks, -f) unlimited
max memory size (kbytes, -m) 32768
open files (-n) 2000
pipe size (512 bytes, -p) 64
stack size (kbytes, -s) 32768
cpu time (seconds, -t) unlimited
max user processes (-u) 262144
virtual memory (kbytes, -v) unlimited
# dd if=/dev/zero of=large_file bs=1024 count=2000000
2000000+0 records in.
2000000+0 records out.收起
谢谢回答小白问题，登出用户重新登录后可以了。
# ulimit -a
core file size (blocks, -c) 1048575
data seg size (kbytes, -d) 131072
file size (blocks, -f) unlimited
max memory size (kbytes, -m) 32768
open files (-n) 2000
pipe size (512 bytes, -p) 64
stack size (kbytes, -s) 32768
cpu time (seconds, -t) unlimited
max user processes (-u) 262144
virtual memory (kbytes, -v) unlimited
# dd if=/dev/zero of=large_file bs=1024 count=2000000
2000000+0 records in.
2000000+0 records out.收起
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