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0 pointsmcherm9y ago0 comments

For what it's worth, what we've been doing is building a separate service for talking to the database, which itself maintains a single common database connection pool.

I can't say yet whether that turns out to be a good idea or a poor one. (I'm not the one who designed and built it.) One notable feature of our implementation is that it eliminates all possibility of using transactions -- a design oversight that worries me.

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jedberg9y ago

You could build the transaction support into the database service. Then when you need to write multiple things, you put them into a queue as a single work unit, and let your abstraction deal with taking the work unit off the queue and putting into the database in a single transaction.

This has the added effect of making your system more reliable because you'll be using queues and you have a shorter window when a process can die and hang a db connection that is trying to roll back.

mchermOP9y ago

You certainly COULD (and if I were designing it I would have either done that or allowed callers to request a transaction in which case a connection is temporarily reserved for that client and a token returned which can be used to continue the transaction). But the people designing it DIDN'T do either. Which is part of why I question their design.

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jedberg9y ago

This has the added effect of making your system more reliable because you'll be using queues and you have a shorter window when a process can die and hang a db connection that is trying to roll back.

mchermOP9y ago

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