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mod_graceful_shutdown/README.markdown

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mod_graceful_shutdown/README.markdown @ 2433:1908e7aefca9

mod_http_stats_stream/example.html: Update path to reflect last minute rename
author Kim Alvefur <zash@zash.se>
date Wed, 04 Jan 2017 09:41:27 +0100
parent 2170:4652a112a4ba
child 2818:88474dd1af48
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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 ===
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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,
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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8 sometimes eg client unavailable notifications don't make it to all
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
4652a112a4ba mod_graceful_shutdown: Experiment in improving the shutdown experience
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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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14
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15 This module works by breaking the shutdown process into separate steps
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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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19
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20 1. Stop accepting new client connections.
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21 2. Close all client connections.
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22 3. Fire event for everything else.
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23 4. Tell `net.server` to quit the main loop.
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24 5. ???
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25 6. Still here? Kill itself.
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26