[GitHub] [incubator-pegasus] hycdong opened a new issue #851: Feature: support table online migration through backup and bulk load

[GitBox <gi...@apache.org>]

hycdong opened a new issue #851:
URL: https://github.com/apache/incubator-pegasus/issues/851


   In current implementation, table online migration is supported by duplication, this issue raise a new plan to implement it through cold backup and bulk load. In RocksDB, bulk load support a parameter called `ingest_behind`. If `ingest_behind=false`, the bulk loaded data is newest data, otherwise, the data is oldest. 
   As a result, we raise backup and bulk load to implement table online migration, the migration step is:
   1. client write old table and new table together
   2. old table create a backup
   3. convert backup into sst files
   4. bulk load sst files with  `ingest_behind=true`
   5. client stop write old table
   


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