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added session_settings presets for low memory usage and seed box environments

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Arvid Norberg
2009-05-12 18:05:04 +00:00
parent d5164b1b1e
commit 649f95c932
3 changed files with 134 additions and 5 deletions
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docs/manual.rst
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@@ -3281,13 +3281,48 @@ reset to 0 on reconnect.
``progress`` is the progress of the peer.
session_settings
================
session customization
=====================
You have some control over tracker requests through the ``session_settings`` object. You
You have some control over session configuration through the ``session_settings`` object. You
create it and fill it with your settings and then use ``session::set_settings()``
to apply them. You have control over proxy and authorization settings and also the user-agent
that will be sent to the tracker. The user-agent is a good way to identify your client.
to apply them.
You have control over proxy and authorization settings and also the user-agent
that will be sent to the tracker. The user-agent will also be used to identify the
client with other peers.
presets
-------
The default values of the session settings are set for a regular bittorrent client running
on a desktop system. There are functions that can set the session settings to pre set
settings for other environments. These can be used for the basis, and should be tweaked to
fit your needs better.
::
session_settings min_memory_usage();
session_settings high_performance_seed();
``min_memory_usage`` returns settings that will use the minimal amount of RAM, at the
potential expense of upload and download performance. It adjusts the socket buffer sizes,
disables the disk cache, lowers the send buffer watermarks so that each connection only has
at most one block in use at any one time. It lowers the outstanding blocks send to the disk
I/O thread so that connections only have one block waiting to be flushed to disk at any given
time. It lowers the max number of peers in the peer list for torrents. It performs multiple
smaller reads when it hashes pieces, instead of reading it all into memory before hashing.
This configuration is inteded to be the starting point for embedded devices. It will
significantly reduce memory usage.
``high_performance_seed`` returns settings optimized for a seed box, serving many peers
and that doesn't do any downloading. It has a 128 MB disk cache and has a limit of 400 files
in its file pool. It support fast upload rates by allowing large send buffers.
session_settings
----------------
::