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117ed66037
The internal NATS instance is definitely convenient but it does have one problem: its lifecycle is tied to the Dendrite process. That means if Dendrite panics or OOMs, it takes out NATS with it. I suspect this is sometimes contributing to what people see with stuck streams, as some operations or state might not be written to disk fully before it gets interrupted. Using `SyncAlways` means that NATS will effectively use `O_SYNC` and block writes on flushes, which should improve resiliency against this kind of failure considerably. It might affect performance a little but shouldn't be significant. Also updates NATS to 2.10.20 as there have been all sorts of fixes since 2.10.7, including better `SyncAlways` handling. Signed-off-by: Neil Alexander <git@neilalexander.dev> --------- Signed-off-by: Neil Alexander <git@neilalexander.dev> Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com> |
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