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  • Erik Johnston's avatar
    748d8fdc
    Reduce DB hits for replication · 748d8fdc
    Erik Johnston authored
    Some streams will occaisonally advance their positions without actually
    having any new rows to send over federation. Currently this means that
    the token will not advance on the workers, leading to them repeatedly
    sending a slightly out of date token. This in turns requires the master
    to hit the DB to check if there are any new rows, rather than hitting
    the no op logic where we check if the given token matches the current
    token.
    
    This commit changes the API to always return an entry if the position
    for a stream has changed, allowing workers to advance their tokens
    correctly.
    748d8fdc
    History
    Reduce DB hits for replication
    Erik Johnston authored
    Some streams will occaisonally advance their positions without actually
    having any new rows to send over federation. Currently this means that
    the token will not advance on the workers, leading to them repeatedly
    sending a slightly out of date token. This in turns requires the master
    to hit the DB to check if there are any new rows, rather than hitting
    the no op logic where we check if the given token matches the current
    token.
    
    This commit changes the API to always return an entry if the position
    for a stream has changed, allowing workers to advance their tokens
    correctly.
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