feat: proposals for implementing msg batching to resources #66
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qzhuyan
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Jul 13, 2022
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| We prefer the `replayq`, mainly because in this feature messages are always added and accessed in a queue, we never access data by primary keys like a KV database. This is exactly the applicable scenario of `replayq`. The data files will be stored in the specified directory of the local file system, which is very simple. | ||
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| The `replayq` was added to the Erlang Kafka driver in 2018, it has experienced several emqx versions and has been proved to be very stable. |
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replayq has its limitations, we may list them here.
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What limitations does it have?
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thalesmg
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| - **query_mode**: if set to true, the caller of `emqx_resource:query/3` will be blocked until | ||
| the driver returns or timeouts; if set to false, the `emqx_resource:query/3` returns immediately. |
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| - **query_mode**: if set to true, the caller of `emqx_resource:query/3` will be blocked until | |
| the driver returns or timeouts; if set to false, the `emqx_resource:query/3` returns immediately. | |
| - **query_mode**: if set to sync, the caller of `emqx_resource:query/3` will be blocked until | |
| the driver returns or timeouts; if set to async, the `emqx_resource:query/3` returns immediately. |
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