1. 08 Feb, 2022 1 commit
    • Wen Hui's avatar
      Make INFO command variadic (#6891) · 2e1bc942
      Wen Hui authored
      
      
      This is an enhancement for INFO command, previously INFO only support one argument
      for different info section , if user want to get more categories information, either perform
      INFO all / default or calling INFO for multiple times.
      
      **Description of the feature**
      
      The goal of adding this feature is to let the user retrieve multiple categories via the INFO
      command, and still avoid emitting the same section twice.
      
      A use case for this is like Redis Sentinel, which periodically calling INFO command to refresh
      info from monitored Master/Slaves, only Server and Replication part categories are used for
      parsing information. If the INFO command can return just enough categories that client side
      needs, it can save a lot of time for client side parsing it as well as network bandwidth.
      
      **Implementation**
      To share code between redis, sentinel, and other users of INFO (DEBUG and modules),
      we have a new `genInfoSectionDict` function that returns a dict and some boolean flags
      (e.g. `all`) to the caller (built from user input).
      Sentinel is later purging unwanted sections from that, and then it is forwarded to the info `genRedisInfoString`.
      
      **Usage Examples**
      INFO Server Replication   
      INFO CPU Memory
      INFO default commandstats
      Co-authored-by: default avatarOran Agra <oran@redislabs.com>
      2e1bc942