Roman Puchkovskiy created IGNITE-19344:
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Summary: Generate unique txId prefix per node
Key: IGNITE-19344
URL: https://issues.apache.org/jira/browse/IGNITE-19344
Project: Ignite
Issue Type: Improvement
Reporter: Roman Puchkovskiy
Fix For: 3.0.0-beta2
We need txId (transaction ID) to have the following properties:
# Contain beginTs inside it so that we can extract beginTs from txId
# txId must be globally unique
# Its length must be 128 bits (to fit in UUID) - this requirement comes from
the current implementation and it's not clear why exactly we need it
Current approach is to construct txId as a concatenation of txId prefix (aka
nodeId) and beginTs taken as HLC.now() on the node that generates the txId.
txId prefix must be unique among all coordinators. If we make it unique among
all nodes in the logical topology, this solves our problem.
TBC
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