@kapa.ai i have done a blue green deplyment on mysql and i have binlog on 0 how can i handel it to ni make a full refresh in a syncronous cdc

Airbyte’s CDC implementation requires an initial full snapshot the first time a CDC connection runs; there is no supported way to start CDC “from now” without that initial load. [CDC overview] From the docs: • “The first time the sync is run, a snapshot of the current state of the data will be taken… effectively a Full Refresh.” [CDC overview] • Support has explicitly confirmed: “Even with CDC you must run a full refresh sync the first time… I don’t think it’s possible to bypass this step.” [Forum: DB already refreshed] In your blue‑green scenario where the new MySQL has binlog position 0: 1. You must let Airbyte do a new initial snapshot against the new (green) database for that connection. 2. After that snapshot completes, subsequent syncs will be incremental via CDC, as long as the binlogs needed for the saved offset are still present. [CDC overview; MySQL CDC troubleshooting] The knowledge sources do not describe any supported mechanism to “resume” CDC on a new MySQL instance with binlog at 0 without triggering a new full refresh, nor a safe, documented way to manually edit state to avoid it. 👍 0 button 👎 0 button ℹ️ Tip: Mention @kapa.ai in the thread for follow-ups or DM the app for 1-to-1 help.

explain me how can i fix this

You can’t “fix” this in the sense of avoiding a new initial snapshot: with Airbyte CDC, you must run a full snapshot once per connection, even if your MySQL has just been recreated and binlog starts at 0. From the docs and forum: • For CDC sources, the first sync is always a snapshot (full refresh): “The first time the sync is run, a snapshot of the current state of the data will be taken… effectively a Full Refresh.” [CDC docs] • Support explicitly confirms: “Even with CDC you must run a full refresh sync the first time… I don’t think it’s possible to bypass this step.” [DB already refreshed forum] Given your blue‑green deployment where the new MySQL has binlog at 0, the supported way to “fix” things is: 1. Point the Airbyte MySQL source to the new (green) database and keep CDC enabled. 2. Run the connection once and let Airbyte do the initial snapshot (this will be a full refresh of the selected tables). [CDC docs] 3. After that completes, all subsequent syncs will be incremental via CDC, starting from the log position captured at the end of the snapshot. [CDC docs] The knowledge sources do not describe any supported way to: • Start CDC on the new DB “from now” without that snapshot, or • Manually set the CDC state to skip the full refresh. So the only documented, supported fix is to accept one new full snapshot on the green MySQL, then continue with CDC. 👍 0 button 👎 0 button ℹ️ Tip: Mention @kapa.ai in the thread for follow-ups or DM the app for 1-to-1 help.

how can i no loss the bin log @kapa.ai ?

To avoid losing binlog (so CDC can keep working), you need to configure retention on the MySQL side and sync often enough from Airbyte. 1. Configure binlog / WAL retention in MySQL Airbyte depends on the database keeping its logs long enough between syncs. If logs are purged before Airbyte reads them, Airbyte will be forced to re-snapshot (full refresh). [CDC best practices – DB level] Standard MySQL: • Increase

binlog_expire_logs_seconds

(MySQL 8+) to at least several days (7 days recommended): > “Set a higher

binlog_expire_logs_seconds

. It's recommended to set this value to a time period of 7 days.” [MySQL troubleshooting] Amazon RDS MySQL: • Set

binlog retention hours

to a non‑zero value (e.g. 24+ hours, ideally more):

CALL mysql.rds_set_configuration('binlog retention hours', 24);

[MySQL troubleshooting] General recommendation from CDC best practices: • Optimal: 7 days retention • Minimum: longer than your sync frequency [CDC best practices – DB level] 2. Set Airbyte sync frequency appropriately Your *sync schedule must be shorter than the log retention period*; otherwise, logs can be purged before Airbyte reads them. [CDC best practices – General config] Guidance: • If retention is 3 days → sync at least every 2 days • For near real‑time → every 1–4 hours with ~7‑day retention • For daily reporting → once per day with ≥3–7 days retention [CDC best practices – General config] 3. Recognizing when binlog was already lost If Airbyte logs show: > “Saved offset no longer present on the server, Airbyte is going to trigger a sync from scratch” it means the binlogs for the saved position were already removed. The only recovery is a new full snapshot; you can only prevent this in the future by increasing retention and/or syncing more frequently. [MySQL troubleshooting] ------------------------- So, to “not lose the binlog”: 1. increase MySQL binlog/WAL retention, and 2. configure Airbyte syncs to run more frequently than that retention window. 👍 0 button 👎 0 button ℹ️ Tip: Mention @kapa.ai in the thread for follow-ups or DM the app for 1-to-1 help.