[tor-commits] [sbws/master] docs: explain how sbws is initialized
juga at torproject.org
juga at torproject.org
Sat Feb 23 10:57:25 UTC 2019
commit ad9b53e831dfe2b945a21e282cd63bc858dd1153
Author: juga0 <juga at riseup.net>
Date: Thu Feb 7 10:24:31 2019 +0000
docs: explain how sbws is initialized
---
docs/source/data/scanner.dia | Bin 0 -> 1997 bytes
docs/source/data/use_cases_data_sources.dia | Bin 0 -> 1743 bytes
docs/source/images/scanner.svg | 248 ++++++++++++++++
docs/source/images/use_cases_classes.svg | 401 ++++++++++++++++++++++++++
docs/source/images/use_cases_data_sources.svg | 291 +++++++++++++++++++
docs/source/specification.rst | 49 +++-
6 files changed, 985 insertions(+), 4 deletions(-)
diff --git a/docs/source/data/scanner.dia b/docs/source/data/scanner.dia
new file mode 100644
index 0000000..16bc840
Binary files /dev/null and b/docs/source/data/scanner.dia differ
diff --git a/docs/source/data/use_cases_data_sources.dia b/docs/source/data/use_cases_data_sources.dia
new file mode 100644
index 0000000..b111ab8
Binary files /dev/null and b/docs/source/data/use_cases_data_sources.dia differ
diff --git a/docs/source/images/scanner.svg b/docs/source/images/scanner.svg
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index 0000000..8872437
--- /dev/null
+++ b/docs/source/images/scanner.svg
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diff --git a/docs/source/specification.rst b/docs/source/specification.rst
index ee99f3d..4ad474c 100644
--- a/docs/source/specification.rst
+++ b/docs/source/specification.rst
@@ -70,10 +70,51 @@ ever measured within the validity period into a single file for the tor process
the bandwidth authority is running to read. The bandwidth authority includes
these aggregated results in its votes.
-How it all works
-----------------
-
-We now describe various core parts of sbws.
+Running the scanner
+---------------------
+Overview
+~~~~~~~~~
+
+The :term:`scanner` obtain a list of relays from the Tor network.
+It measures the bandwidth of each relay by creating a two hop circuit with the
+relay to measure and download data from a :term:`destination` Web Server.
+The :term:`generator` creates a :term:`bandwidth list file` that is read
+by a :term:`directory authority` and used to report relays' bandwidth in its
+vote.
+
+.. image:: ./images/scanner.svg
+ :height: 200px
+ :align: center
+
+Intialization
+~~~~~~~~~~~~~~
+
+.. At some point it should be able to get environment variables
+
+#. Parse the command line arguments and configuration files.
+#. Launch a Tor thread with an specific configuration or connect to a running
+ Tor daemon that is running with a suitable configuration.
+#. Obtain the list of relays in the Tor network from the Tor consensus and
+ descriptor documents.
+#. Read and parse the old bandwidth measurements stored in the file system.
+#. Select a subset of the relays to be measured next, ordered by:
+
+ #. relays not measured.
+ #. measurements age.
+
+.. image:: ./images/use_cases_data_sources.svg
+ :alt: data sources
+ :height: 200px
+ :align: center
+
+Classes used in the initialization:
+
+.. image:: ./images/use_cases_classes.svg
+ :alt: classes initializing data
+ :height: 300px
+ :align: center
+
+Source code: :func:`sbws.core.scanner.run_speedtest`
Simple relay prioritization
~~~~~~~~~~~~~~~~~~~~~~~~~~~
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