Controlling virtual machine porting activity based on dynamically-calculated virtual machine predicate values in match expressions
Computer-implemented techniques for controlling virtual machine (VM) porting activities based on dynamically-calculated virtual machine predicate values. Upon receiving a command to port a subject virtual machine from a source virtualization system environment to a target virtualization system environment (wherein the source virtualization system environment and the target virtualization system environment are different), one or more match expressions that describe time of day and resource predicates conditions, under which porting operations of the subject virtual machine are to be carried out are evaluated. Based on observance of the aforementioned time of day and resource predicates, various virtual machine porting operations are either carried out (e.g., when applicable match expressions and/or predicates evaluate to TRUE), or are temporarily suspended (e.g., when the applicable match expressions and/or predicates evaluate to FALSE). Multiple virtual machines can be ported concurrently while observing VM priorities and bandwidth throttling.
1 . A non-transitory computer readable medium having stored thereon a sequence of instructions which, when stored in memory and executed by a processor cause the processor, to perform acts for controlling virtual machine porting activity based on dynamically-calculated virtual machine predicate values, the acts comprising:
receiving a command to move a subject virtual machine from a source virtualization system environment to a target virtualization system environment, wherein the source virtualization system environment and the target virtualization system environment are different;
accessing one or more match expressions that describe time of day and resource predicate conditions under which porting operations of the subject virtual machine are carried out; and
invoking a virtual machine move operation, based on observance of the time of day and resource predicate conditions of the one or more match expressions.
2 . The non-transitory computer readable medium of claim 1 , further comprising instructions which, when stored in memory and executed by the processor, cause the processor to perform further acts of:
identifying a set of service level agreements;
evaluating one or more virtual machine predicate values in the match expressions of the set of service level agreements; and
prior to invoking an I/O operation of the virtual machine porting activity, instead, temporarily suspending the virtual machine porting activity.
3 . The non-transitory computer readable medium of claim 2 , further comprising instructions which, when stored in memory and executed by the processor, cause the processor to perform further acts of:
associating two or more bandwidth caps to respective virtual machines; and
observing a lower one of the two or more bandwidth caps.
4 . The non-transitory computer readable medium of claim 2 , wherein evaluating the one or more virtual machine predicate values in the match expressions is carried out after invoking the virtual machine move operation.
5 . The non-transitory computer readable medium of claim 2 , further comprising instructions which, when stored in memory and executed by the processor, cause the processor to perform further acts of, considering the set of service level agreements in a timeframe between I/O operations that constitute the virtual machine porting activity.
6 . The non-transitory computer readable medium of claim 1 , further comprising instructions which, when stored in memory and executed by the processor, cause the processor to perform further acts of:
comparing an alternate virtual machine's priority to the subject virtual machine's priority; and
choosing which virtual machine to service based on the comparing.
7 . The non-transitory computer readable medium of claim 1 , wherein the source virtualization system environment hosts a first type of hypervisor that is different from a second type of hypervisor hosted by the target virtualization system environment.
8 . A method for controlling virtual machine porting activity based on dynamically-calculated virtual machine predicate values, the method comprising:
receiving a command to move a subject virtual machine from a source virtualization system environment to a target virtualization system environment, wherein the source virtualization system environment and the target virtualization system environment are different;
accessing one or more match expressions that describe time of day and resource predicate conditions under which porting operations of the subject virtual machine are carried out; and
invoking a virtual machine move operation, based on observance of the time of day and resource predicate conditions of the one or more match expressions.
9 . The method of claim 8 , further comprising:
identifying a set of service level agreements;
evaluating one or more virtual machine predicate values in the match expressions of the set of service level agreements; and
prior to invoking an I/O operation of the virtual machine porting activity, instead, temporarily suspending the virtual machine porting activity.
10 . The method of claim 9 , further comprising:
associating two or more bandwidth caps to respective virtual machines; and
observing a lower one of the two or more bandwidth caps.
11 . The method of claim 9 , wherein evaluating the one or more virtual machine predicate values in the match expressions is carried out after invoking the virtual machine move operation.
12 . The method of claim 9 , further comprising, considering the set of service level agreements in a timeframe between I/O operations that constitute the virtual machine porting activity.
13 . The method of claim 8 , further comprising:
comparing an alternate virtual machine's priority to the subject virtual machine's priority; and
choosing which virtual machine to service based on the comparing.
14 . The method of claim 8 , wherein the source virtualization system environment hosts a first type of hypervisor that is different from a second type of hypervisor hosted by the target virtualization system environment.
15 . A system for controlling virtual machine porting activity based on dynamically-calculated virtual machine predicate values, the system comprising:
a storage medium having stored thereon a sequence of instructions; and
a processor that executes the sequence of instructions to cause the processor to perform acts comprising,
receiving a command to move a subject virtual machine from a source virtualization system environment to a target virtualization system environment, wherein the source virtualization system environment and the target virtualization system environment are different;
accessing one or more match expressions that describe time of day and resource predicate conditions under which porting operations of the subject virtual machine are carried out; and
invoking a virtual machine move operation, based on observance of the time of day and resource predicate conditions of the one or more match expressions.
16 . The system of claim 15 , further comprising instructions which, when stored in memory and executed by the processor cause the processor to perform further acts of:
identifying a set of service level agreements;
evaluating one or more virtual machine predicate values in the match expressions of the set of service level agreements; and
prior to invoking an I/O operation of the virtual machine porting activity, instead, temporarily suspending the virtual machine porting activity.
17 . The system of claim 16 , further comprising instructions which, when stored in memory and executed by the processor cause the processor to perform further acts of:
associating two or more bandwidth caps to respective virtual machines; and
observing a lower one of the two or more bandwidth caps.
18 . The system of claim 16 , wherein evaluating the one or more virtual machine predicate values in the match expressions is carried out after invoking the virtual machine move operation.
19 . The system of claim 16 , further comprising instructions which, when stored in memory and executed by the processor cause the processor to perform further acts of, considering the set of service level agreements in a timeframe between I/O operations that constitute the virtual machine porting activity.
20 . The system of claim 15 , further comprising instructions which, when stored in memory and executed by the processor cause the processor to perform further acts of:
comparing an alternate virtual machine's priority to the subject virtual machine's priority; and
choosing which virtual machine to service based on the comparing.
21 . The system of claim 15 , wherein the source virtualization system environment hosts a first type of hypervisor that is different from a second type of hypervisor hosted by the target virtualization system environment.