Visit Our UNIX and Linux User Community


checking the heartbeat of the online user


 
Thread Tools Search this Thread
Top Forums Programming checking the heartbeat of the online user
# 1  
Old 10-11-2002
Question checking the heartbeat of the online user

hello,
Can anyone please tell me how can i check the availability of the online user in a client-server environtment.
This is for a program where lakhs of client are connected to the server and the server has to check the availability of the every client in every minute.
So polling every client is not a good option.
Can anyone help me for the solution.

Previous Thread | Next Thread
Test Your Knowledge in Computers #942
Difficulty: Medium
The underlying Data Link Layer never poses limits to the maximum frame size.
True or False?

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Checking the user input in perl for characters and length

My question is basically as the title says. How can I check a user inputted string is only certain characters long (for example, 3 characters long) and how do I check a user inputted string only contains certain characters (for example, it should only contain the characters 'u', 'a', 'g', and 'c')... (4 Replies)
Discussion started by: Eric1
4 Replies

2. Shell Programming and Scripting

TCSH user input error checking

This was taken down recently because it appeared to be homework, but it isn't. It's for a script I am working on at work. Thanks for the help. How do you check that user inputs (arguments 1 and 2) are both numbers and are at least 5 digits in length? (2 Replies)
Discussion started by: thibodc
2 Replies

3. UNIX for Dummies Questions & Answers

is there a command to see when the last time a user has been online if they arent?

When I use who it shows who is online and from what time they logged in but is there a way I can see the last time someone was logged on if they aren't online? Is it with the who command? thx (11 Replies)
Discussion started by: subway69
11 Replies

4. AIX

hacmp - is it possible to remove a disk heartbeat network from an online cluster?

Hi I'm a little rusty with HACMP, but wanted to find out if it is possible to remove a disk heartbeat network from a running HACMP cluster. Reason is, I need to migrate all the SAN disk, so the current heartbeat disk will be disappearing. Ideally, I'd like to avoid taking the cluster down to... (2 Replies)
Discussion started by: cmcbugg
2 Replies

5. UNIX for Advanced & Expert Users

time duration of being online of a particular user given the user name

in a multi user system of 3 users X,Y,Z, if i know that X is presently online, is it possible to determine for how long has he been online? i mean the time duration (3 Replies)
Discussion started by: arindamlive
3 Replies

6. Programming

Checking columns in SQL, comparing user input and sizes.

I'm writing a KSH shell script that's using SQL though DB2. If I have a table defined and populated db2 "create table tb(num int,letter char(4))" db2 "insert into tb values(111,a) db2 "insert into tb values(112,b) db2 "insert into tb values(111,c) How can I check if a letter user... (0 Replies)
Discussion started by: busdude
0 Replies

7. Programming

C++ - Problem in asking and checking user's passwd

This is the source code: #include <pwd.h> #include <iostream> #include <string.h> using namespace std; int main() { struct passwd *user; char login="alex", password="qwertyuiop"; if ((user= getpwnam(login)) == NULL) cout << "No such user\n"; else if... (24 Replies)
Discussion started by: hakermania
24 Replies

8. Shell Programming and Scripting

Online user list script

I decided to delete the first post since it was againt the forum rules (4 Replies)
Discussion started by: Necrologist
4 Replies
SYSTEMD-NETWORKD-WAIT-ONLINE.SERVICE(8)                      systemd-networkd.service                      SYSTEMD-NETWORKD-WAIT-ONLINE.SERVICE(8)

NAME
systemd-networkd-wait-online.service, systemd-networkd-wait-online - Wait for network to come online SYNOPSIS
systemd-networkd-wait-online.service /lib/systemd/systemd-networkd-wait-online DESCRIPTION
systemd-networkd-wait-online is a one-shot system service that waits for the network to be configured. By default, it will wait for all links it is aware of and which are managed by systemd-networkd.service(8) to be fully configured or failed, and for at least one link to gain a carrier. OPTIONS
The following options are understood: -i, --interface= Network interface to wait for before deciding if the system is online. This is useful when a system has several interfaces which will be configured, but a particular one is necessary to access some network resources. This option may be used more than once to wait for multiple network interfaces. When used, all other interfaces are ignored. --ignore= Network interfaces to be ignored when deciding if the system is online. By default, only the loopback interface is ignored. This option may be used more than once to ignore multiple network interfaces. --timeout= Fail the service if the network is not online by the time the timeout elapses. A timeout of 0 disables the timeout. Defaults to 120 seconds. SEE ALSO
systemd(1), systemd-networkd.service(8) systemd 237 SYSTEMD-NETWORKD-WAIT-ONLINE.SERVICE(8)

Featured Tech Videos