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1 #summary Connection-level rate limiting |
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2 #labels Stage-Beta |
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3 |
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4 = Introduction = |
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5 |
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6 On some servers, especially public ones, it is desired to make sure that everyone gets their fair share of system resources (and no more). |
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7 |
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8 mod_limits allows you to specify traffic bandwidth limits, preventing any single connection hogging the server's CPU, RAM and bandwidth. |
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9 |
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10 = Details = |
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11 |
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12 mod_limits detects when a connection has exceeded its traffic allowance and temporarily ignores a connection. Due to the way TCP and the OS's network API works no data is lost, only slowed. |
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13 |
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14 = Configuration = |
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15 Currently mod_limits is configured per connection type. The possible connection types are: |
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16 |
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17 * c2s |
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18 * s2sin |
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19 * s2sout |
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20 * component |
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21 |
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22 The limits are specified like so: |
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23 |
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24 {{{ |
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25 limits = { |
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26 c2s = { |
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27 rate = "3kb/s"; |
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28 burst = "2s"; |
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29 }; |
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30 s2sin = { |
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31 rate = "10kb/s"; |
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32 burst = "5s"; |
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33 }; |
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34 } |
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35 }}} |
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36 |
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37 All units are in terms of _bytes_, not _bits_, so that "kb/s" is interpreted as "kilobytes per second", where a kilobyte is 1000 bytes. |
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38 |
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39 = Compatibility = |
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40 | 0.9 | Works | |
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41 | 0.8 | Doesn't work(*) | |
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42 |
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43 (*) This module can be made to work in 0.8 if you do two things: |
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44 # Install [http://hg.prosody.im/0.9/raw-file/d46948d3018a/util/throttle.lua util.throttle] into your Prosody source's util/ directory. |
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45 # If you use libevent apply [http://prosody.im/patches/prosody08-mod-limits-fix.patch this patch] to net/server_event.lua. |
