최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0124864 (2005-05-09) |
등록번호 | US-7370226 (2008-05-06) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 1 인용 특허 : 326 |
A method of monitoring a status condition of a first server with a second server in a server network, and also providing synchronization and messaging between the two servers, the method including: transmitting a software-generated pulse waveform from the first server to a device coupled to the firs
A method of monitoring a status condition of a first server with a second server in a server network, and also providing synchronization and messaging between the two servers, the method including: transmitting a software-generated pulse waveform from the first server to a device coupled to the first server, wherein the software-generated pulse waveform is comprises a first command corresponding to a logic level low and a second command corresponding to a logic level high; setting said device to a first state during logic level lows of said pulse waveform and to a second state during logic level highs of said pulse waveform; receiving the software-generated pulse waveform with the second server by determining when said device is in the first state and when it is in the second state; and determining when said device no longer changes from the first state to the second state. In order to provide synchronization and messaging, said pulse waveform is frequency modulated in order to communicate specified commands and/or reference points between the two servers.
What is claimed is: 1. A method of determining the status of a server comprising: transmitting status commands from a first server to a device which is coupled to the first server; monitoring with a second server the status of the device; and determining with the second server the status of the fir
What is claimed is: 1. A method of determining the status of a server comprising: transmitting status commands from a first server to a device which is coupled to the first server; monitoring with a second server the status of the device; and determining with the second server the status of the first server based on the status of the device. 2. The method of claim 1 wherein a changing device status indicates that the first server remains operational. 3. The method of claim 1 wherein a constant device status indicates that the first server has failed. 4. The method of claim 1 wherein the first server controls at least one network resource. 5. The method of claim 4 further comprising assigning control of the network resource to the second server based on the status of the device. 6. The method of claim 1 wherein the status commands comprise a pulse waveform. 7. The method of claim 1 wherein the status commands comprise reserve and release commands. 8. The method of claim 1 wherein the device is a SCSI device. 9. An apparatus for determining the status of a server comprising: a first server that is configured to transmit status commands to a device which is coupled to the first server; and a second server that is configured to monitor the status of the device and wherein the second server is further configured to determine the status of the first server based on the status of the device. 10. The apparatus of claim 9 wherein a changing device status indicates that the first server remains operational. 11. The apparatus of claim 9 wherein a constant device status indicates that the first server has failed. 12. The apparatus of claim 9 wherein the first server controls at least one network resource. 13. The apparatus of claim 12 wherein control of the network resource is assigned to the second server based on the status of the device. 14. The apparatus of claim 9 wherein the status commands comprise a pulse waveform. 15. The apparatus of claim 9 wherein the status commands comprise reserve and release commands. 16. The apparatus of claim 9 wherein the device is a SCSI device. 17. An apparatus for determining the status of a server comprising: means for transmitting status commands from a first server to a device which is coupled to the first server; means for monitoring the status of the device; and means for determining with a second server the status of the first server based on the status of the device. 18. The apparatus of claim 17 wherein a changing device status indicates that the first server remains operational. 19. The apparatus of claim 17 wherein a constant device status indicates that the first server has failed. 20. The apparatus of claim 17 wherein the first server controls of at least one network resource. 21. The apparatus of claim 17 further comprising assigning control of the network resource to the second server based on the status of the device. 22. The apparatus of claim 17 wherein the status commands comprise a pulse waveform. 23. The apparatus of claim 17 wherein the status commands comprise reserve and release commands. 24. The apparatus of claim 17 wherein the device is a SCSI device.
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