International Business Machines Corporation

Ariel Kass

Amalia Avraham

Lior Tamary

Erez Alexander Theodorou

A method according to one embodiment includes sending, from a first system to a second system, a request for a clock value associated with a third system; receiving, from the second system, a clock value associated with the third system and a query clock value determined at the second system; comparing, at the first system, the clock value associated with the third system to the query clock value determined at the second system; determining an amount of time since the third system contacted the second system, in response to determining that the query clock value is greater than the clock value associated with the third system; comparing the difference to a threshold time; determining that the third system is unavailable when the difference exceeds the predetermined threshold time value; and performing one or more predetermined actions at the first system in response to determining that the third system is unavailable.

Identifying an availability of a system

A computer-implemented method according to one embodiment includes sending, from a first system to a second system, a request for a clock value associated with a third system, receiving, from the second system, a clock value associated with the third system and a query clock value determined at the second system, comparing, at the first system, the clock value associated with the third system to the query clock value determined at the second system to determine whether the third system is unavailable, and performing one or more predetermined actions at the first system in response to determining that the third system is unavailable.

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Nofim, Israel

Ariel Kass