v0.6 Road map

[doyoubi]

Undermoon v0.6 will come with some breaking changes and further improvements on migration during scaling.

Data Migration

• Optimize UMSYNC command
• Amend retry for locked key in importing proxy during migration.
• Use multiple futures to scan the keys for migrating proxy based on slots to fasten the migration and reduce the latency of UMSYNC command.
• Support new key lock that can be acquired by multiple non-del commands or del commands (which can be implemented by changing to slot lock instead of key lock and using reference counting).
• Add statistics for the performance key points in migration like lock contention count.
• Add "migrated status" for hot key in the importing proxy during migration.
• Use reference counting to optimize WaitableTask
• Add client timeout

Reliability

• Implement a new checker in Golang in place of the checker in undermoon-operator
  • Related issue: Implement a new checker in Golang for testing undermoon-operator#33