Answers:
超时值是每次尝试的值,因此设置a +time=5
将导致15秒的延迟,因为默认+tries
值为3
。如果设置,+tries=1
则命令将在5秒后超时,例如
time dig +time=5 @hii.com hello.me
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5_7.1 <<>> +time=5 @hii.com hello.me
; (1 server found)
;; global options: printcmd
;; connection timed out; no servers could be reached
real 0m15.017s
user 0m0.003s
sys 0m0.011s
或与 tries=1
time dig +time=5 +tries=1 @hii.com hello.me
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5_7.1 <<>> +time=5 +tries=1 @hii.com hello.me
; (1 server found)
;; global options: printcmd
;; connection timed out; no servers could be reached
real 0m5.015s
user 0m0.006s
sys 0m0.007s