Introduce "Lock Strategy" option #182
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With this commit, we allow using an in-application lock in ghostferry, instead of using the source DB as lock. The lock is required to avoid race conditions between the data iteration/copy and the binlog writer. The default behavior is preserved; a new option "LockStrategy" allows moving the lock from the source DB into ghostferry, or disabling the lock altogether. This fixes Shopify#169 Change-Id: I20f1d2a189078a3877f831c7a98e8ca956620cc7
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With this commit, we allow using an in-application lock in ghostferry,
instead of using the source DB as lock. The lock is required to avoid
race conditions between the data iteration/copy and the binlog writer.
The default behavior is preserved; a new option "LockStrategy" allows
moving the lock from the source DB into ghostferry, or disabling the
lock altogether.
This fixes #169