Use Case

As a Data Explorer user I want to avoid redundant network roundtrips when connecting So that I can start querying my data seconds faster

User Experience

• Reduced connection time by eliminating redundant ping commands
• Users will see their cluster connect faster (lower round-trip times)

Risks/Unknowns

• Need to ensure first meaningful command doesn't break existing connection logic
• AutoEncryption path may have special requirements that need the buildInfo check

Acceptance Criteria

Implementation Requirements

• Remove redundant ping commands from Compass and devtools-connect layers (driver's ping already removed)
• First command executed should be meaningful for Compass operations rather than a ping
• For autoEncryption scenarios, buildInfo check should remain but no additional pings
• Avoid running any pings on compass-web startup
• Performance target: Reduce connection RTT by eliminating 2 unnecessary ping roundtrips

Testing Requirements

• Verify that an auth containing connection string does not run ping
• Verify a no auth LB cluster still throws an error if the hostname does not exist

References

• https://github.com/mongodb-js/compass/blob/ef67e94d2fe116604e0cd8e7134f73664ca24c85/packages/data-service/src/connect-mongo-client.ts#L255
• https://github.com/mongodb-js/devtools-shared/blob/e3c7a8441131a2447858b2ebf13884042337f68b/packages/devtools-connect/src/connect.ts#L117
• https://github.com/mongodb/node-mongodb-native/blob/b6c0db2f6301874cccc423e4adb090ad9d07c460/src/sdam/topology.ts#L474