System and method for determining a master remote access controller in an information handling system
View Patent ↗A method and information handling system (IHS) determines a master remote access controller (RAC) in a distributed IHS having multiple communicatively-connected computing nodes with corresponding RACs. The method includes transmitting a first set of RAC parameters from a first RAC to several other RACs. The first set of RAC parameters includes a locality of reference (LOR) value for the first RAC. Several other sets of RAC parameters are received from the other RACs. A first list of all of the RACs is generated including the associated LOR values. The first list is sorted based on the LOR values and the RAC having the highest LOR value in the first list is designated as a first master RAC candidate.
1. A computer-implemented method of determining a master remote access controller (RAC) in an information handling system (IHS), the method comprising:
transmitting a first set of RAC parameters from a first RAC to a plurality of other RACs, the first set of RAC parameters including a locality of reference (LOR) value for the first RAC, the LOR value being a measure of the frequency of a user access or login to the first RAC;
receiving a plurality of other sets of RAC parameters, including associated LOR values, from the plurality of other RACs;
generating a first list of all of the RACs including the associated LOR values;
sorting the first list based on the LOR values;
designating the RAC having the highest LOR value in the first list as a first master RAC candidate;
generating a second list of all of the RACs excluding the elected master RAC, the second list including the associated LOR values for each RAC on the second list;
sorting the second list based on the LOR values; and
designating the RAC having the highest LOR value on the second list as a secondary master RAC.
2. The method of claim 1 , wherein the RAC parameters comprise at least one of a RAC identifier, a LOR value, a firmware revision level, an IHS operational condition indicator, and a ping response time.
3. The method of claim 1 , further comprising:
determining if the first master RAC candidate has a current firmware revision level and a good IHS operational condition indicator;
in response to determining that the first master RAC candidate has a current firmware revision level and a good IHS operational condition indicator, transmitting identifying parameters of the first master RAC candidate to the other RACs;
querying the other RACs for their selections of other master RAC candidates;
receiving identifying parameters of the other master RAC candidates from the other RACs; and
determining as the elected master RAC, one of the master RAC candidates that receives a highest number of selections by all of the RACs.
4. The method of claim 3 , further comprising:
identifying when the elected master RAC has been determined; and
in response to the elected master RAC having been determined, transmitting the identifying parameters of the elected master RAC to the other RACs.
5. The method of claim 3 , further comprising:
identifying when the elected master RAC has been determined;
in response to the elected master RAC not having been determined, determining if a group retry count is less than a group retry count threshold;
in response to the group retry count being less than the group retry count threshold, designating a most recent master RAC as the elected master RAC; and
in response to the group retry count not being less than the group retry count threshold, incrementing the group retry count.
6. The method of claim 1 , further comprising:
determining if the first master RAC candidate has a current firmware revision level and a good IHS operational condition indicator;
in response to determining that the first master RAC candidate does not have both the current firmware revision level and the good IHS operational condition indicator, determining if any other RACs remain on the first list;
in response to other RACs remaining on the first list, removing the first master RAC candidate from the first list; and
designating the next RAC on the first list as the first master RAC candidate.
7. A computer-implemented method of determining a master remote access controller (RAC) in an information handling system (IHS), the method comprising:
transmitting a first set of RAC parameters from a first RAC to a plurality of other RACs, the first set of RAC parameters including a locality of reference (LOR) value for the first RAC;
receiving a plurality of other sets of RAC parameters from the other RACs;
generating a first list of all of the RACs including the associated LOR values;
sorting the first list based on the LOR values;
designating the RAC having the highest LOR value in the first list as a first master RAC candidate
determining if the first master RAC candidate has a current firmware revision level and a good IHS operational condition indicator;
in response to determining that the first master RAC candidate does not have both the current firmware revision level and the good IHS operational condition indicator, determining if any other RACs remain on the first list; and
in response to no other RACs remaining on the first list, identifying and designating a default master RAC as the elected master RAC.
8. The method of claim 1 , further comprising:
generating a second list of all of the RACs excluding the elected master RAC, the second list including the associated LOR values and a ping response time;
sorting the second list based on the LOR values; and
determining if any of the LOR values are within a similar LOR limit;
in response to determining the LOR values are within a similar LOR limit, sorting the second list based on the ping response time; and
designating the RAC having the lowest ping response time as a secondary master RAC candidate.
9. The method of claim 1 , further comprising:
retrieving a current LOR value;
determining a number of logins to the first RAC for a first time period;
assigning a weight value based on the number of logins to the first RAC for the first time period;
calculating a new LOR value based on the current LOR value and the weight value; and
storing the new LOR value as the current LOR value.
10. An information handling system (IHS) comprising:
a processor, a first remote access controller (RAC) communicatively coupled to the processor, and a memory device communicatively coupled to the first RAC, the first RAC including firmware executing thereon to determine a master RAC, wherein the firmware configures the first RAC to:
transmit a first set of RAC parameters from the first RAC to a plurality of other RACs, the RAC parameters including a locality of reference (LOR) value for the first RAC, the LOR value being a measure of the frequency of a user access or login to the first RAC;
receive a plurality of other sets of RAC parameters, including associated LOR values, from the plurality of other RACs;
generate a first list of all of the RACs including the associated LOR values;
sort the first list based on the LOR values;
designating the RAC having the highest LOR value in the first list as a first master RAC candidate;
generate a second list of all of the RACs excluding the elected master RAC, the second list including the associated LOR values for each RAC on the second list;
sort the second list based on the LOR values; and
designate the RAC having the highest LOR value on the second list as a secondary master RAC.
11. The information handling system of claim 10 , wherein the RAC parameters comprise at least one of a RAC identifier, a LOR value, a firmware revision level, an IHS operational condition indicator and a ping response time.
12. The information handling system of claim 10 , wherein the firmware further configures the first RAC to:
determine if the first master RAC candidate has a current firmware revision level and a good IHS operational condition indicator;
in response to determining that the first master RAC candidate has the current firmware revision level and the good IHS operational condition indicator, transmit identifying parameters of the first master RAC candidate to the other RACs;
query the other RACs for their selections of other master RAC candidates;
receive identifying parameters of the other master RAC candidates from the other RACs; and
determine, as the elected master RAC, one of the master RAC candidates that receives a highest number of selections by all of the RACs.
13. The information handling system of claim 12 , wherein the firmware further configures the first RAC to:
identify when the elected master RAC has been determined; and
in response to the elected master RAC having been determined, transmit the identifying parameters of the elected master RAC to the other RACs.
14. The information handling system of claim 12 , wherein the firmware further configures the first RAC to:
identify when the elected master RAC has been determined;
in response to the elected master RAC not having been determined, determine if a group retry count is less than a group retry count threshold;
in response to the group retry count being less than the group retry count threshold, designate a most recent master RAC as the elected master RAC; and
in response to the group retry count not being less than the group retry count threshold, increment the group retry count.
15. The information handling system of claim 10 , wherein the firmware further configures the first RAC to:
determine if the first master RAC candidate has a current firmware revision level and a good IHS operational condition indicator;
in response to determining that the first master RAC candidate does not have both the current firmware revision level and the good IHS operational condition indicator, determine if any other RACs remain on the first list;
in response to other RACs remaining on the first list, removing the first master RAC candidate from the first list; and
designating the next RAC on the first list as the first master RAC candidate.
16. The information handling system of claim 10 , wherein the firmware further configures the first RAC to:
determine if the first master RAC candidate has a current firmware revision level and a good IHS operational condition indicator;
in response to determining that the first master RAC candidate does not have both the current firmware revision level and the good IHS operational condition indicator, determine if any other RACs remain on the first list; and
in response to no other RACs remaining on the first list, identify and designate a default master RAC as the elected master RAC.
17. The information handling system of claim 10 , wherein the firmware further configures the first RAC to:
generate a second list of all of the RACs excluding the elected master RAC, the second list of including the associated LOR values and a ping response time;
sort the second list based on the LOR values; and
determine if any of the LOR values are within a similar LOR limit;
in response to determining the LOR values are within a similar LOR limit, sort the second list based on the ping response time; and
designate the RAC having the lowest ping response time as a secondary master RAC candidate.
18. The information handling system of claim 10 , wherein the firmware further configures the first RAC to:
retrieve a current LOR value;
determine a number of logins to the first RAC for a first time period;
assign a weight value based on the number of logins to the first RAC for the first time period;
calculate a new LOR value based on the current LOR value and the weight value; and
store the new LOR value as the current LOR value.