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  1. Documentation
  2. DOCS-6314

We should recommend CNAME's TTL to be set to zero

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    • Icon: Improvement Improvement
    • Resolution: Won't Fix
    • Icon: Major - P3 Major - P3
    • Server_Docs_20231030
    • None
    • manual, Server
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    Description

      With three config servers set up it is possible to have a scenario when after CNAME change connections to config servers established incorrectly. For example, mongos, instead of connecting to the config servers #1, #2 and #3 may have two connections to the config server #1, none to #2 and one to #3. That may be caused by a non-zero TTL value set for a CNAME record used to host a config server. This article should contain a recommendation to have CNAME's TTL set to zero.

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            kay.kim@mongodb.com Kay Kim (Inactive)
            dmitry.ryabtsev@mongodb.com Dmitry Ryabtsev
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            Dates

              Created:
              Updated:
              Resolved:
              8 years, 19 weeks, 6 days ago