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  1. Core Server
  2. SERVER-67071

Sharding should not use hidden indexes

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Details

    • Bug
    • Status: Needs Scheduling
    • Major - P3
    • Resolution: Unresolved
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    Description

      MongoDB 4.4 introduces the possibility to hide an index, this allows to ensure that there are no performance impact on dropping it.
      Currently the sharding system does not take into consideration this information and it can use an index even if it's hidden reducing the scope of testing the possibile impact in dropping an index

      db.test.insert({a:1})
      sh.shardCollection("test.test",{a:1})
      -> fail
      db.test.createIndex({a:1})
      db.test.hideIndex({a:1})
      sh.shardCollection("test.test",{a:1})
      

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            backlog-server-sharding Backlog - Sharding Team
            renato.riccio@mongodb.com Renato Riccio
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            Dates

              Created:
              Updated: