Method and apparatus for using a serial cable as a cluster quorum device
First Claim
1. A method for obtaining a quorum vote by a first node using a quorum cable, comprising:
- determining that a network connection between the first node and a second node is inactive, wherein the network connection is associated with a local area network;
determining whether the quorum cable is reserved by the second node using a remote reservation input (RRI) on a first end;
if the quorum cable is not reserved by the second node;
asserting a local reservation input (LRI) on the first end by the first node;
monitoring a local reservation output (LRO) on the first end by the first node to determine whether the LRO on the first end is asserted in response to asserting the LRI on the first end; and
obtaining the quorum vote by the first node, if the LRO on the first end is asserted,wherein the quorum vote is obtained without direct communication between the first node and the second node,wherein the quorum cable comprises the first end directly connected to the first node and the second end directly connected to a second node.
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Abstract
A method for obtaining a quorum vote by a first node using a quorum cable, wherein the quorum cable comprises a first end connected to the first node and a second end connected to a second node, including determining whether the quorum cable is reserved by the second node using a remote reservation input (RRI) on the first end, if the quorum cable is not reserved by the second node asserting a local reservation input (LRI) on the first end by the first node, monitoring a local reservation output (LRO) on the first end by the first node to determine whether the LRO on the first end is asserted in response to asserting the LRI on the first end, and obtaining the quorum vote by the first node, if the LRO on the first end is asserted.
41 Citations
12 Claims
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1. A method for obtaining a quorum vote by a first node using a quorum cable, comprising:
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determining that a network connection between the first node and a second node is inactive, wherein the network connection is associated with a local area network; determining whether the quorum cable is reserved by the second node using a remote reservation input (RRI) on a first end; if the quorum cable is not reserved by the second node; asserting a local reservation input (LRI) on the first end by the first node; monitoring a local reservation output (LRO) on the first end by the first node to determine whether the LRO on the first end is asserted in response to asserting the LRI on the first end; and obtaining the quorum vote by the first node, if the LRO on the first end is asserted, wherein the quorum vote is obtained without direct communication between the first node and the second node, wherein the quorum cable comprises the first end directly connected to the first node and the second end directly connected to a second node. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cluster comprising:
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a quorum cable having a first end and a second end; a first node directly connected to the first end; and a second node directly connected to the second end, wherein the first node and the second node comprise functionality to reserve the quorum cable, thereby obtaining a quorum vote, wherein the quorum vote is obtained without direct communication between the first node and the second node, wherein the first end comprises a first local reservation input (LRI), a first local reservation output (LRO), and a first remote reservation input (RRI), and the second end comprises a second LRI, a second LRO, and a second RRI, wherein the first node and the second node are connected via a network connection associated with a local area network. - View Dependent Claims (9, 10, 11, 12)
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Specification