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- cloud - 2PC vs Sagas (distributed transactions) - Stack Overflow
2-phase commit (2PC) Sagas; 2PC is a protocol for applications to transparently utilize global ACID transactions by the support of the platform Being embedded in the platform, it is transparent to the business logic and the application code as far as I know
- database - Paxos vs two phase commit - Stack Overflow
In comparison to 2PC it requires more messages, but it is resilient to manager failures In comparison to most 3PC algorithms, Paxos renders a simpler, more efficient algorithm (minimal message delay), and has been proved to be correct Gray and Lamport compare 2PC and Paxos in an excellent paper titled "Consensus on Transaction Commit"
- Difference between 2PC (2 phase commit) and 2 PL (2 phase locking)
2 phase commit is an algorithm for implementing distributed transaction across multiple database instances to ensure all nodes either commit or abort the transaction
- database - Two phase commit - Stack Overflow
This problem is – mostly – circumvented by the addition of an extra phase to 2PC, unsurprisingly giving us a three-phase commit protocol The idea is very simple We break the second phase of 2PC – ‘commit’ – into two sub-phases The first is the ‘prepare to commit’ phase
- distributed systems - Why is Two-Phase Commit (2PC) blocking . . .
Since 2PC uses only 2 messages, in order to keep the cohorts consistent, the cohorts can never apply a commit without explicitly receiving a COMMIT message So, when a coordinator crashes, the cohorts can either (1) apply a ABORT using a timeout or (2) can remain in waiting state indefinitely
- How do two-phase commits prevent last-second failure?
This is not correctly said 2PC is 100% correct under certain assumptions For this question, the participant must durably store data from pre-commit and must be able to finish the commit after a restart, if coordinator instructs it to The coordinator must also durably store the final decision to rollback or commit and retry it, should it fail
- How ACID is the two-phase commit protocol? - Stack Overflow
Due to blocking nature, 2PC is an overkill in almost any practical situation and a wise design of storage locations and data flows can give a better solution Basically, you need a unique most authoritative source of any kind of information and all other involved parties must be able to update themselves to that authoritative state
- oracle database - What SQL is being processed in a given transaction . . .
To be more precise, let's consider a situation when there're some in-doubt transactions which appeared in DBA_2PC_PENDING view I have the local and global numbers of these transactions, but wanted to know if we are able to get information about what SQL is being processed inside them, or what was done
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