Safe cut over #64
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Safe cut over #64
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shlomi-noach
commented
Jun 14, 2016
shlomi-noach
commented
- Supporting multi-step, safe cut-over phase, where queries are blocked throughout the phase, and worst case scenario is table outage (no data corruption)
- Self-rollsback in case of failure (restored original table)
added 5 commits
June 13, 2016 18:36
- Supporting multi-step, safe cut-over phase, where queries are blocked throughout the phase, and worst case scenario is table outage (no data corruption) - Self-rollsback in case of failure (restored original table)
- Removed `CutOverVoluntaryLock` and associated code - Removed `CutOverUdfWait` - `RenameTablesRollback()` first attempts an atomic swap
- Removed `CutOverVoluntaryLock` and associated code - Removed `CutOverUdfWait` - `RenameTablesRollback()` first attempts an atomic swap
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Algorithm depicted in: #65 |
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Merging this under the assumption the algorithm is correct (right now a few hundred production tests show no error). Will revisit if need be. |
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