The Linux-HA project (http://www.linux-ha.org/) offers a high availability solution commonly referred to as Linux Heartbeat. Linux Heartbeat ships as part of several Linux distributions, as well as within several embedded high availability systems. This solution can also be used for other applications besides databases servers, such as mail servers, web servers, file servers, and DNS servers. Linux Heartbeat implements a heartbeat-protocol.

In the following section, we provide answers to questions that are most frequently asked about DRBD Architecture.

Every WAPM has a heartbeat function. The heartbeat's frequency and resolution is configurable (refer to each WAPM's specifications). The heartbeat function is like a watchdog, a WAPM will communicate with its WPIM at least once every hearbeat period. If a WPIM misses two heartbeats in a row from a WAPM, then the WPIM asserts a "loss of RF communications" trouble signal to the ACP. (back)

The Heartbeat Award is a national scheme promoted by and managed on a local basis by local authority Environmental Health departments in partnership with various Northamptonshire County Council departments. It is a prestigious award which can gain good publicity for the restaurant, pub, takeaway, school or caterer concerned. The Heartbeat Award requires caterers to:

Don't Panic! Your baby could just be positioned in a way that the Doppler can't locate the heart beat. Try again in another part of your belly, or walk around before trying again. If you still cannot locate the heart rate, make an appointment to see your health care provider.

The Home Heartbeat??? system is the first personal awareness system for the home. It provides homeowners with anytime knowledge of the inner workings of their homes while they go about their daily lives by adding simple remote monitoring to ordinary household devices and systems. It treats all homeowner concerns - from comfort and convenience to safety and security - as a challenge that can be addressed by one scaleable solution.

In short, Linux is a free, powerful, and stable operating system like Windows98, except Linux is free, powerful and stable.

There are numerous patches designed to provide access to the Intel CPU performance counters. As PAPI began, we used the original Beowulf patch (perf) by David Hendriks. However, as PAPI progressed, we needed some addition features, which I graciously added. This patch used a system call approach and has proven to be exceedingly stable. Yes, no crashes reported.

Your heartbeat will be noticeably different from your baby's. Please refer to Doppler Tips for more information.

Init scripts are handled as LSBResourceAgent[4]s. Problems with them are quite common and the LSBResourceAgent[4] page contains a series of steps to help you determine if the script is usable or not.

A normal range is usually anywhere from 120-180 beats per minute. Usually, it is very easy to recognize the difference between your own heartbeat and the heartbeat of a fetus is so much faster. Fetal heartbeats commonly sound like a galloping horse. No, it is common to pick the heartbeat up from two different locations. Generally, physicians note the difference in the two heartbeats if twins are suspected.

Yes, by connecting the doppler to your computer or another recording device (using a 1/8" Stereo to 1/8" Stereo Cord). Connect one end to the headphone output on the doppler and the other end to the line in on your computer. If you are using your computer, then just record the heartbeat by using an audio recording program like Windows Sound Recorder.

The heartbeat protocol uses UDP port 694 to send a UDP message from network 1 interface to other LB-8000. Backup manager keeps listening to port 694 and waiting for the heartbeat UDP packet sent from the primary manager, through both Network 1 and serial port interface. If primary manager is working normally, it will send a UDP packet through each Network 1 and serial port periodically.

LB-8000 sends heartbeat signal through both Network 1 and serial port. Only when backup fails to get heartbeat signals from both interfaces will the failover happens.

Only one time of heartbeat time out will standby LB-8000 claim active LB-80000 down. In other words, once the heartbeat signal times out on standby side, the standby LB-8000 will start taking over the active role.

The Home Heartbeat??? system is for people who want to keep in touch with their homes so they can avert emergencies and problems before they get out of control. If you have ever had water damage due to a leaky pipe, left your garage door open, or forgotten to change an air filter, Home Heartbeat??? can help you. The system is also a good fit for your lifestyle if you have:

Home Heartbeat??? components use low-frequency radio chips to form a monitoring network throughout the home. The system performs a "health check" that occurs every 24 hours between the base and all components to ensure they are operating properly.

Batteries are included with the Home KeyTM and all sensors when purchased. The base station is AC powered but optional batteries can be added for protection in case of a power loss. The base station is AC powered with (2), CR123A, 3-volt lithium batteries to keep the system running in the event of power failure. The Home KeyTM runs on a custom re-chargeable lithium ion battery and should provide about two years of service. (Included)