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146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef RIPPLE_PEERFINDER_TUNING_H_INCLUDED
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#define RIPPLE_PEERFINDER_TUNING_H_INCLUDED
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#include <array>
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namespace ripple {
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namespace PeerFinder {
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/** Heuristically tuned constants. */
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/** @{ */
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namespace Tuning {
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enum
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{
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//---------------------------------------------------------
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//
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// Automatic Connection Policy
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//
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//---------------------------------------------------------
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/** Time to wait between making batches of connection attempts */
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secondsPerConnect = 10
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/** Maximum number of simultaneous connection attempts. */
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,maxConnectAttempts = 20
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/** The percentage of total peer slots that are outbound.
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The number of outbound peers will be the larger of the
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minOutCount and outPercent * Config::maxPeers specially
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rounded.
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*/
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,outPercent = 15
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/** A hard minimum on the number of outgoing connections.
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This is enforced outside the Logic, so that the unit test
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can use any settings it wants.
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*/
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,minOutCount = 10
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/** The default value of Config::maxPeers. */
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,defaultMaxPeers = 21
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/** Max redirects we will accept from one connection.
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Redirects are limited for security purposes, to prevent
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the address caches from getting flooded.
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*/
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,maxRedirects = 30
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};
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//------------------------------------------------------------------------------
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//
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// Fixed
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//
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//------------------------------------------------------------------------------
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static std::array <int, 10> const connectionBackoff
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{{ 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 }};
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//------------------------------------------------------------------------------
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//
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// Bootcache
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//
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//------------------------------------------------------------------------------
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enum
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{
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// Threshold of cache entries above which we trim.
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bootcacheSize = 1000
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// The percentage of addresses we prune when we trim the cache.
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,bootcachePrunePercent = 10
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};
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// The cool down wait between database updates
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// Ideally this should be larger than the time it takes a full
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// peer to send us a set of addresses and then disconnect.
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//
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static std::chrono::seconds const bootcacheCooldownTime (60);
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//------------------------------------------------------------------------------
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//
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// Livecache
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//
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//------------------------------------------------------------------------------
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enum
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{
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// Drop incoming messages with hops greater than this number
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maxHops = 6
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// How many Endpoint to send in each mtENDPOINTS
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,numberOfEndpoints = 2 * maxHops
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// The most Endpoint we will accept in mtENDPOINTS
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,numberOfEndpointsMax = 20
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// The number of peers that we want by default, unless an
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// explicit value is set in the config file.
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,defaultMaxPeerCount = 21
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/** Number of addresses we provide when redirecting. */
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,redirectEndpointCount = 10
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};
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// How often we send or accept mtENDPOINTS messages per peer
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static std::chrono::seconds const secondsPerMessage (5);
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// How long an Endpoint will stay in the cache
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// This should be a small multiple of the broadcast frequency
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static std::chrono::seconds const liveCacheSecondsToLive (30);
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//
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//
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//
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// How much time to wait before trying an outgoing address again.
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// Note that we ignore the port for purposes of comparison.
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static std::chrono::seconds const recentAttemptDuration (60);
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}
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/** @} */
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}
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}
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#endif
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