reliability

We have put ActiveMQ on a fresh server. Configured it to use 'kahadb' (the preferred as we read) and set it to allow the file to expand to 2gb. Then when we put load on the queue (+- 500/sec), within a few minutes activemq crashes. When ActiveMQ tries to restart, it can't because the db is corrupt: 2010-11-29 13:00:50,359 | ERROR | Failed to start ActiveMQ JMS Message Broker. Reason: java.io.EOFException | org.apache.activemq.broker.BrokerService | WrapperSimpleAppMain java.io.EOFException at java.io.RandomAccessFile.readFully(RandomAccessFile.java:383) at java.io.RandomAccessFile.readFully

I'm trying to run a simple python script all the time. I want it to start automatically on bootup and be able to recover from failures. That is, if there is a failure that causes the script to stop, I don't really care and just want it to start running again. I'm OK if the whole device restarts. I just tested a working script using init.d , but am not sure how to recover from a failure? Have a cronjob check for the existence of a pid? I'd also like to check for integrity. That is, I'd like to make sure the script was not modified accidentally by some other process. I've heard of checking a

I've written a small operating system for embedded project running on small to medium target. I added some automated unit test with a high test code coverage (>95%), but the scope is only the static part. I got some code metrics as complexity and readability. I'm testing my code with a rule checker with MiSRA support, and of course fixed all warnings. I'm testing the code with a static analyzer and again fixed all warnings. What can I do now to test - and improve - the reliability of my OS ? How about the dynamic part ? Try writing some unit tests for the dynamic part. Then run the tests on

Is it a good idea to use sockets to send data between two servers, or should I use something like MQ for moving data. My questions: are sockets reliable, if I need once only/assured delivery of the data? Are there any other solutions? Thanks. Sockets are an application level API for performing network communication. The reliability of sockets depends on the network protocol that you select when you create the socket. If you select TCP/IP, you will get "reliable" transfer ... up to a limit. If you select UDP/IP you will get "unreliable" transfer. As stated in other answers, TCP ensures that you

Closed. This question is off-topic . It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I have been trialling the Bizspark / Azure offer for my company. When we accidentally exceeded our free usage limit by 1c, Microsoft deleted our VMs and handed our IP addresses to other customers. This was done instantly, out of hours and without prior warning. It took three days for the DNS changes to propagate for our new IP address and during this time, anyone accessing our web sites saw the sites of random

I am trying to figure an agreement protocol on an unreliable channel. Basically two parties (A and B) have to agree to do something, so it's the two generals' problem . Since there is no bullet-proof solution, I am trying to do this. A continuously sends a message with sequence 1 When B receives seq 1 it continuously replies with sequence 2 At this point A receives seq 2 so it starts sending seq 3 ... My question. When can the two parties conclude that they can take the action ? Obviously I can't set a condition: " do it after receiving 10 messages " since the last sender won't have any