Heartbeat (as of version 3.x) is a cluster messaging layer, often combined with pacemaker as the cluster resource manager.
A detailed explanation, including historical notes, can be found at: http://www.linux-ha.org/wiki/Heartbeat
Questions tagged [heartbeat]
243 questions
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votes
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Heart Beat Detection with Camera
I am searching for a library to detect heart beats using an android phone's camera. As far as i see, apps with this capability use two ways:
Placing your finger tip on the camera lens and watching the changes in frames in camera.
Watching your…
mehmet6parmak
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1 answer
Heartbeat extension: does it make sense to allow for arbitrary payload?
https://tools.ietf.org/html/rfc6520 does not explain why a heartbeat request/response round-trip is supposed to contain a payload. It just specifies that there is room for payload and that the response has to contain the same payload as the…
Dr. Jan-Philip Gehrcke
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Taking photo every 66 milliseconds on Android phone for colour analysis (Heart Rate Monitor)
I'm doing a final year project at university which involves making a medical application for Android, as a practice I have to make a heart rate monitor app.
I have worked out that the best way to do this is to look for colour changes in your blood…
Antony
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Detecting HeartBeat Using WebCam?
I am trying to create an application which can detect heartbeat using your computer webcam. I am working on the code since 2 weeks and developed this code and here I got so far
How does it works? Illustrated below ...
Detecting face using…
B L Λ C K
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3 answers
Ajax Heartbeat using setInterval, Preventing multiple calls at the same time
I wish to make an AJAX call using jQuery as a "heartbeat" in the background so that my web application can check for new data. For example every 10 seconds.
I have seen on other posts that it is possible to use setInterval() to call a method which…
Luke
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5
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3 answers
Is there a way to kill the erlang vm when it is running with -heart?
The title pretty much sums it up. I have a zotonic site running with -heart, it uses lots of cpu time and I can't get an erlang shell. So, is there a way to kill the vm? killall heart and killall beam.smp are not working.
I found this question:
Stop…
Simon Lindgren
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How can 2 threads communicate each other?
Thread A is summing up data passed from 10 clients.
while(true){
Socket clientfd= server.accept ();
BufferedReader message = new BufferedReader(new InputStreamReader (clientfd.getInputStream() ) );
String val = message.readLine();
…
user482594
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5
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2 answers
usage of erlang heart
How should heart be used to keep an application alive?
Lets say I have an application X, will it be monitored if I just call something like:
erl -boot X -heart -env HEART_BEAT_TIMEOUT 30 -detached
?
Daniel
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5
votes
2 answers
CouchDB heart-beat time-out
My CouchDB (production) server is sometimes shut down, without my wanting it to. While inspecting logs I noticed Erlang/CouchDB (one or the other) sends a heart beat, and that heart beat is monitored. When a time-out occurs, the server is brutally…
Peter Kruithof
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5
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2 answers
Java heartbeat design
I need to implement a heartbeat system on my Java project (3-5 Clients with 1 server for them) but I have some questions.
1) Do I need to have 2 sockets by clients ? 1 for the heartbeat and 1 to receive normal message for my software
2) I saw that…
Tata2
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4 answers
How to create a background threaded on interval function call in python?
I am trying to implement a heartbeat call that works in the background. How do I create a threaded on interval call of say every 30 seconds, which calls the following function:
self.mqConn.heartbeat_tick()
Also how would I stop this thread?
Many…
TheBear
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1 answer
Connecting a Heart Rate Monitor to a Windows PC Java application
I'm currently working on a Thesis project which requires my java program to keep track of a users current heart rate. Now, my problem is that i seem to be unable to find any sort of heart rate monitor which is able to connect to a java program…
Ino Koludrovic
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Detect Heart Rate using iPhone Camera
Possible Duplicate:
Detecting heart rate using the camera
I am working on detecting pulse rate in iOS. I have done some search and now I am able to read heart beats using external bluetooth device which is capable of reading heart beats. But now…
user1988
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Disabling Socket.io heartbeats (Node.js)
The socket.io documentation mentions that heartbeats can be disabled like so:
io.disable('heartbeats');
Unfortunately, while this seems to stop the hearbeats from being sent, the clients still disconnect when they are not sending hearbeats.
The…
Tom
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4
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REST API heart beat standard
For a SaaS product which provide its services via REST API, is it a standard requirement to have a heartbeat API?
I have a debate on this subject at work, in my point of view, the heartbeat API is redundant - in case of outages we have a status…
planben
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