|
I have two components that that communicate via TCP/IP. Component A acts as a server/listener and Component B is the client. The two should communicate as quickly as possible. There can only ever be one connection at any time (though that is aside to ...
Started by rob_g on
, 14 posts
by 14 people.
Answer Snippets (Read the full thread at stackoverflow):
The connection will remain open - there....
Your socket may appear open, but the person is.
What you call a heartbeat is useful when trying to set timeouts.
A heartbeat in order to help detect dead connections, IRC with it's ping for example.
|
|
Hello all, i want to detect heart rate using iphone sdk does someone knows any method for calculating heartbeat rate?
Started by Rahul Vyas on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Some of them use the accelerometer to detect minute movements in your arm/hand when you hold the phone, some of them can use the microphone, you could also do a manual 'tap' interface where you tap the screen while... .
Well I've seen various implementations.
|
|
Does anyone have experience configuring drbd with heartbeat between 2 virtual linux machines (VMWare Infrastructure)?
The problem I am running into is that heartbeat likes multiple data paths to see its peer node. For instance, it likes to have a network...
Started by Brent on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at serverfault):
Not everyone (e.g..
Caveat emptor: heartbeat 2 uses XML config files.
Like on heartbeat 1 by drbd.
|
Ask your Facebook Friends
|
Hey gang. I have just written a client and server in C++ using sys/socket. I need to handle a situation where the client is still active but the server is down. One suggested way to do this is to use a heartbeat to periodically assert connectivity. And...
Started by windfinder on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Make sure.
In this case, having a heartbeat is useful.
Maybe this will help you, TCP Keepalive HOWTO is merely hung, the socket will remain open .
To build your own heartbeat into your protocol.
|
|
We have an RMI client application written in Java which needs to send periodic "stay alive" messages to a server application. We have implemented this as a separate heartbeat thread, which sends the stay alive message to the server, then sleeps for 15...
Started by Simon Nickerson on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
It may also be advisable to set if your server times out your client after ... .
You could send the heartbeat in a different thread to prevent the time it takes to send the heartbeat being added to your delay.
You can not really guarantee it.
|
|
Using DRBD version: 8.2.6 (api:88/proto:86-88)
Here is the contents of /etc/ha.d/haresources
db1 192.168.100.200/24/eth0 drbddisk::mysql Filesystem::/dev/drbd0::/drbd::ext3::defaults mysql
and /etc/ha.d/ha.cf
logfile /var/log/ha-log logfacility local0...
Started by Andy on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at serverfault):
I'm not very good with heartbeat, but with pacemaker I would the switch had been completed.
The way to test heartbeat would be that you will issue service heartbeat stop on one machine at the Pacemaker and Linux-HA mailing lists.
|
|
I've heard Jeff and Joel discuss on a podcast what they called a "Heartbeat" which essentially is creating something that acts similar to running a windows service in an website. I was hoping to get some more insight into how something like this would...
Started by Micah on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Check this link for introduction for Heartbeat in WCF
Basically you use a web page.
The aim of the heartbeat is to sayd "I am still alive" from the server side.
Client and WCF service acts as a server.
|
|
I'm looking at setting up automatic failover for Apache and MySQL. I'm planning on putting a small proxy server in front of two Apache boxes, and two MySQL boxes. Apache will rsync data from the master -> slave every so often, and MySQL will be set...
Started by dragonmantank on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at serverfault):
Just set heartbeat.
If you want simple, go with heartbeat 1; heartbeat 2 went to more-active configuration, including full web service and full proxy service on both(!).
Linux HA is a nice toolset.
|
|
Recently I've added some load-balancing capabilities to a piece of software that I wrote. It is a networked application that does some data crunching based on input coming from a SQL database. Since the crunching can be pretty intensive I've added the...
Started by Miky D on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Broadcast a heartbeat every t using UDP; if you haven't heard from a machine in more than k*t the heartbeat includes a "reboot count" as well as "machine ID" so that you know previous server state server in the cluster maintains its own ....
|
|
I'm looking at implementing a "Heartbeat" process to do a lot of repeated cleanup tasks throughout the day.
This seemed like a good chance to use the Command pattern, so I have an interface that looks like:
public interface ICommand { void Execute(); ...
Started by Simucal on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
We've done a bunch of things like this recently so I can offer a few suggestions... .
As to the suitability, why not just use a Timer?
This is a great start .
Running variable will need to be marked as volatile if its state is going to be changed by another thread .
|
