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.
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)
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)
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)
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)
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)
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)
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)
CL_STATUS(1) User commands CL_STATUS(1)NAME
cl_status - Check status of the High-Availability Linux (Linux-HA) subsystem
SYNOPSIS
cl_status sub-command options parameters
DESCRIPTION
cl_status is used to check the status of the High-Availability Linux subsystem.
SUPPORTED SUB-COMMANDS
hbstatus
Indicate if heartbeat is running on the local system.
listnodes
List the nodes in the cluster.
nodetype ping|normal
List the nodes of the given type.
Note
Ping nodes are obsolete in Pacemaker cluster, having been replaced with the pingd resource agent.
listhblinks node
List the network interfaces used as heartbeat links. node should be specified as listed in the ha.cf(5) file for the cluster.
hblinkstatus node link
Show the status of a heartbeat link. node should be specified as listed in the ha.cf(5) file for the cluster. link should be as per
the output of the listhblinks subcommand.
clientstatus node client [timeout]
Show the status of heartbeat clients. node and client should be specified as listed in the ha.cf(5) file for the cluster. Timeout is
in milliseconds, the default is 100ms.
rscstatus
Show the status of cluster resources. Status will be one of: local, foreign, all or none.
Note
This option is deprecated, it is obsolete in Pacemaker clusters.
parameter -p parameter
Retrieve the value of cluster parameters. The parameters may be one of the following: apiauth, auto_failback, baud, debug, debugfile,
deadping, deadtime, hbversion, hopfudge, initdead, keepalive, logfacility, logfile, msgfmt, nice_failback, node, normalpoll, stonith,
udpport, warntime, watchdog.
Note
Some of these options are deprecated; see ha.cf(5)OPTIONS
The following options are supported by heartbeat:
-m
Make the output more human readable. The default output should be easier for scripts to parse. Available with all commands.
-p
List only 'ping' nodes. Available with listnodes sub-command.
Note
Ping nodes are obsolete in Pacemaker cluster, having been replaced with the pingd resource agent.
-n
List only 'normal' nodes. Available with listnodes sub-command.
SEE ALSO heartbeat(8), ha.cf(5), authkeys(5)AUTHORS
Alan Robertson <alanr@unix.sh>
cl_status
Juan Pedro Paredes Caballero <juampe@retemail.es>
man page
Simon Horman <horms@verge.net.au>
man page
Florian Haas <florian.haas@linbit.com>
man page
Heartbeat 3.0.5 24 Nov 2009 CL_STATUS(1)