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annotate mod_graceful_shutdown/README.markdown @ 4049:78f1de5301fc

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mod_adhoc_dataforms_demo: Fix duplicate field prevention It's supposed to only include each type of form field once per form at most but it didn't note which fields it had added already. No idea what the probability was anyways, probably pretty low.
author Kim Alvefur <zash@zash.se>
date Tue, 23 Jun 2020 19:40:55 +0200
parents 88474dd1af48
children 999e7cb7f6d9
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4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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1 This module is an experiment about a more graceful shutdown process.
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2
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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3 Why
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4 ===
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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5
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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6 When shutting down, a number of sessions, connections and other things
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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7 are teared down. Due to all these things happening very quickly,
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88474dd1af48 Various READMEs: s/eg/e.g.g/
Kim Alvefur <zash@zash.se>
parents: 2170
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8 sometimes e.g. client unavailable notifications don't make it to all
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4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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9 remote contacts because the server-to-server connections are teared down
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10 just after.
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11
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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12 How
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13 ===
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4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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15 This module works by breaking the shutdown process into separate steps
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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16 with a brief pause between them.
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17
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18 It goes something like this
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20 1. Stop accepting new client connections.
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21 2. Close all client connections.
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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22 3. Fire event for everything else.
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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23 4. Tell `net.server` to quit the main loop.
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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24 5. ???
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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25 6. Still here? Kill itself.
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26