No, poll is the poll interval.
When there is a good and reliable peer for a long time then ntpd will double the poll interval.
So a small poll interval means there is high dispersion(=jitter).
Your bad device is the 172.28.42.204 that is still at the initial 16000 dispersion.
Please test connectivity with
The default values in ntp.conf are okay.
You should be more worried about security, and add a restriction like
(As a quick alternative to a replacement of ntpd with chronyd.)
Hi Friends,
How can I Restore the Files present under "lost+found" Directory of a FileSystem (in Solaris & Tru64 OS) to their original Locations.
Now-a-days I am loosing lots of files in 2 of my Machines,
One running Solaris8 and other Tru64(Digital) Unix.
Thanx in... (1 Reply)
Is there some way to force the NTP server on a brand-new install to be "suitable" to sync other servers from? (I'm more concerned with synchronization between machines, and less concerned with what the actual time they sync to is)
For example, whenever I install fresh from the Fedora DVDs and... (0 Replies)
does anyone know how to change the treshold of 128ms in NTP.
in order to ignore these alarms:
Oct 27 14:44:15 rt1 ntpd: synchronisation lost
Oct 27 15:08:25 rt1 ntpd: time reset 0.688591 s
Oct 27 15:08:25 rt1 ntpd: synchronisation lost
Oct 27 15:28:45 rt1 ntpd: time reset 0.462257 s (0 Replies)
Hi,
I was trying to call "script <an ip add>" command from .profile file to log everything whenever anyone logs in to this user. I did the following at the end of .profile. 1) Extracted the IP address who logged in 2) Called script < ip add> . The problem I am facing is all, aliases etc. written... (3 Replies)
Hi,
This is odd, however here goes. There are several shell scripts that run in our production environment AIX 595 LPAR m/c, which has sufficient memory 14GB (physical memory) and horsepower 5CPUs. However from time to time we get the following errors in these shell scripts. The time when these... (11 Replies)
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
Hi All,
I'm completely new to bash scripting and still learning my way through albeit vey slowly.
I need to know where to insert my server names', my ip address numbers through out the script alas to no avail.
I'm also searching on how to save .sh (bash shell) script properly.... (25 Replies)
Hello.
System : opensuse leap 42.3
I have a bash script that build a text file.
I would like the last command doing :
print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt
where :
print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies
LEARN ABOUT DEBIAN
io_nonblock
io_nonblock(3) Library Functions Manual io_nonblock(3)NAME
io_nonblock - switch to non-blocking I/O
SYNTAX
#include <io.h>
void io_nonblock(int64 fd);
DESCRIPTION
io_nonblock puts UNIX descriptor fd into ``non-blocking mode.'' Calling io_nonblock(fd) before io_fd(fd) makes io_tryread and io_trywrite
faster and more efficient.
Actually, current UNIX kernels do not support non-blocking descriptors; they support non-blocking open files. Furthermore, many programs
will break if they encounter non-blocking mode. This means that you must not use io_nonblock for a descriptor inherited from another pro-
gram.
io_nonblock has no return value; it always succeeds. If d is not the number of a UNIX descriptor, io_nonblock has no effect.
If io_fd is given a descriptor in blocking mode, io_tryread and io_trywrite go through the following contortions to avoid blocking:
1 Stop if poll says that the descriptor is not ready. Otherwise there's a good chance, but not a guarantee: even if poll says the descrip-
tor is ready, the descriptor might not be ready a moment later. (Furthermore, poll can fail on some systems.)
2 Catch SIGALRM. SIGALRM must not be blocked, and must not be used elsewhere in the program.
3 Set an interval timer so that any blocking call will be interrupted by SIGALRM within 10 milliseconds. (Current UNIX kernels do not
allow any shorter interval.) Of course, this may still mean a 10-millisecond delay.
If io_fd is given a descriptor in non-blocking mode (or a descriptor for a regular disk file), io_tryread and io_trywrite avoid these con-
tortions.
SEE ALSO io_wait(3), io_canwrite(3)io_nonblock(3)