what is vglock?

A vg used as cluster lock is generally called vglock. cluster lock refer to a tie breaker short of thing which is generally used in a two node service guard cluster. In the event of failure of communication between two nodes whoever takes control of lock first will continue to run cluster and other node will be halted.

Hence the purpose of this is to ensure both nodes independently form two seperate clusters in the even of failure of communication among them.

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