Asymmetric quorum protocol based distributed transaction database consistency control
In some examples, asymmetric quorum protocol based distributed transaction database consistency control may include determining, by a set of primary participants of a cluster, whether a cluster-wide quorum has been reached to commit a transaction associated with a distributed transactional database. Further, based on the determination by the set of primary participants that the cluster-wide quorum has been reached to commit the transaction, instructions to a set of secondary participants of the cluster may be sent to commit the transaction. The set of secondary participants may be configured to comply with a determination by the set of primary participants to commit or to not-commit the transaction.
1. An apparatus comprising:
at least one processor; and
a non-transitory computer readable medium storing machine readable instructions that when executed by the at least one processor cause the at least one processor to:
determine, by a set of primary participants of a cluster, whether a cluster-wide quorum has been reached to commit a transaction associated with a distributed transactional database by determining whether greater than one-half of the primary participants have determined to commit the transaction associated with the distributed transactional database; and
based on the determination by the set of primary participants that the cluster-wide quorum has been reached to commit the transaction, send instructions to a set of secondary participants of the cluster to commit the transaction, wherein the set of secondary participants is to comply with a determination by the set of primary participants to commit or to not-commit the transaction.
2. The apparatus according to claim 1 , wherein the machine readable instructions further cause the at least one processor to:
based on a determination by the set of primary participants that the cluster-wide quorum has not been reached to commit the transaction, send instructions to the set of secondary participants of the cluster to not commit the transaction.
3. The apparatus according to claim 1 , wherein the machine readable instructions further cause the at least one processor to:
based on a determination by the set of primary participants that the cluster-wide quorum has been reached to not commit the transaction, send instructions to the set of secondary participants of the cluster to not commit the transaction.
4. The apparatus according to claim 1 , wherein the machine readable instructions further cause the at least one processor to:
specify a number of the primary participants as being less than a number of the secondary participants.
5. The apparatus according to claim 1 , wherein the machine readable instructions further cause the at least one processor to:
specify a number of the primary participants as being equal to a number of the secondary participants.
6. The apparatus according to claim 1 , wherein the machine readable instructions further cause the at least one processor to:
specify a number of the primary participants as being greater than a number of the secondary participants.
7. The apparatus according to claim 1 , wherein the transaction represents an initial transaction, and wherein the machine readable instructions further cause the at least one processor to:
specify a number of the secondary participants for a further transaction as being different from a number of the secondary participants for the initial transaction.
8. The apparatus according to claim 1 , wherein the machine readable instructions further cause the at least one processor to:
based on the determination by the set of primary participants that the cluster-wide quorum has been reached to commit the transaction, send instructions to additional primary participants of the cluster to commit the transaction, wherein the additional primary participants are not tasked to perform quorum analysis for committing or not-committing the transaction.
9. The apparatus according to claim 1 , wherein the machine readable instructions further cause the at least one processor to:
determine that the primary participants are operational after a malfunction of the primary participants;
determine a version associated with the primary participants prior to the malfunction of the primary participants; and
set a version of the cluster as the version associated with the primary participants prior to the malfunction of the primary participants.
10. The apparatus according to claim 1 , wherein the primary participants include data segment coverage, and wherein the machine readable instructions further cause the at least one processor to:
based on a determination that a primary participant of the primary participants including data segment coverage has malfunctioned, send instructions to all participants of the cluster to not commit the transaction.
11. A computer implemented method comprising:
determining, by a processor, by a set of primary participants of a cluster, whether a cluster-wide quorum has been reached to commit a transaction associated with a distributed transactional database by determining whether greater than one-half of the primary participants have determined to commit the transaction associated with the distributed transactional database; and
based on a determination by the set of primary participants that the cluster-wide quorum has been reached to not commit the transaction, sending, by the processor, instructions to a set of secondary participants of the cluster to not commit the transaction, wherein the set of secondary participants is to comply with a determination by the set of primary participants to commit or to not-commit the transaction.
12. The computer implemented method according to claim 11 , further comprising:
based on a determination by the set of primary participants that the cluster-wide quorum has been reached to commit the transaction, sending, by the processor, instructions to the set of secondary participants of the cluster to commit the transaction.
13. The computer implemented method according to claim 11 , further comprising:
specifying, by the processor, a number of the primary participants as being different from a number of the secondary participants.
14. The computer implemented method according to claim 11 , further comprising:
specifying, by the processor, a number of the primary participants as being same as a number of the secondary participants.
15. A non-transitory computer readable medium storing machine readable instructions that, when executed, cause a processor to:
determine, by a set of primary participants of a cluster, whether a cluster-wide quorum has been reached to commit a transaction associated with a distributed transactional database by determining whether greater than one-half of the primary participants have determined to commit the transaction associated with the distributed transactional database; and
based on the determination by the set of primary participants that the cluster-wide quorum has been reached to commit the transaction, send instructions to a set of secondary participants of the cluster to commit the transaction, wherein the set of secondary participants is to comply with a determination by the set of primary participants to commit or to not-commit the transaction.
16. The non-transitory computer readable medium according to claim 15 , wherein the machine readable instructions, when executed, further cause the processor to:
based on a determination by the set of primary participants that the cluster-wide quorum has not been reached to commit the transaction, send instructions to the set of secondary participants of the cluster to not commit the transaction.
17. The non-transitory computer readable medium according to claim 15 , wherein the machine readable instructions, when executed, further cause the processor to:
based on a determination by the set of primary participants that the cluster-wide quorum has been reached to not commit the transaction, send instructions to the set of secondary participants of the cluster to not commit the transaction.
18. The non-transitory computer readable medium according to claim 15 , wherein the primary participants that determine whether the cluster-wide quorum has been reached are designated quorum primary participants, and wherein the machine readable instructions, when executed, further cause the processor to:
determine that the quorum primary participants are operational after a malfunction of the quorum primary participants;
determine a version associated with the quorum primary participants prior to the malfunction of the quorum primary participants; and
set a version of the cluster as the version associated with the quorum primary participants prior to the malfunction of the quorum primary participants.
19. The non-transitory computer readable medium according to claim 15 , wherein the primary participants that determine whether the cluster-wide quorum has been reached are designated quorum primary participants, wherein the quorum primary participants include data segment coverage, and wherein the machine readable instructions, when executed, further cause the processor to:
based on a determination that a primary participant of the quorum primary participants including data segment coverage has malfunctioned, send instructions to all participants of the cluster to not commit the transaction.
20. The non-transitory computer readable medium according to claim 15 , wherein the machine readable instructions, when executed, further cause the processor to:
based on the determination by the set of primary participants that the cluster-wide quorum has been reached to commit the transaction, send instructions to additional primary participants of the cluster to commit the transaction, wherein the additional primary participants are not tasked to perform quorum analysis for committing or not-committing the transaction.