[GitHub] [iotdb] lpf4254302 commented on pull request #6884: [IOTDB-3611] Support "Modify Time Series Encoding and Compression Type" interface/command

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lpf4254302 commented on PR #6884:
URL: https://github.com/apache/iotdb/pull/6884#issuecomment-1221903369

   Phase III thinking modification code thinking:
   1. Modify the SCHEMA command-remove the rewriting code
   2. Modify the SCHEMA command-rewriting the log (here you only need to record the modification command record and the overwriting complete record)
   3. Modify the SCHEMA command-increase the rewriting memory record
   4. Modify the SCHEMA command-remove the original rewriting lock and use the new rewriting lock (only control the modification and finishing process, not the merger)
   5. Restore code-Remove all
   6. Restore code-increase the memory record through the log
   7. Consolidation code (inside and outside) -On the original rewriting lock
   8. Merge code (inside and outside) -writer's SCHEMA acquisition conditions: There is modification-> modification sequence-> query schema, otherwise use the file in the file
   9. Sort the command-file scan-whether there are modified sequences in the file, and the sequence coding has a list of changes.
   10. Sort out command-new rewriting lock control
   11. Sort out command-virtual storage group rewriting tasks
   12. Sort the command-Single file rewriting code modification
   13. Sort the command-alignment optimization


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