2 This file is part of GNUnet.
3 (C) 2009 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file include/gnunet_constants.h
23 * @brief "global" constants for performance tuning
24 * @author Christian Grothoff
27 #ifndef GNUNET_CONSTANTS_H
28 #define GNUNET_CONSTANTS_H
33 #if 0 /* keep Emacsens' auto-indent happy */
39 * Bandwidth (in/out) to assume initially (before either peer has
40 * communicated any particular preference). Should be rather low; set
41 * so that at least one maximum-size message can be send roughly once
44 #define GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT GNUNET_BANDWIDTH_value_init (1024)
47 * After how long do we consider a connection to a peer dead
48 * if we don't receive messages from the peer?
50 #define GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
53 * How long do we delay reading more from a peer after a quota violation?
55 #define GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2)
58 * After how long do we consider a service unresponsive
59 * even if we assume that the service commonly does not
60 * respond instantly (DNS, Database, etc.).
62 #define GNUNET_CONSTANTS_SERVICE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 10)
65 * How long do we delay messages to get larger packet sizes (CORKing)?
67 #define GNUNET_CONSTANTS_MAX_CORK_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
70 * Until which load do we consider the peer overly idle
71 * (which means that we would like to use more resources).<p>
73 * Note that we use 70 to leave some room for applications
74 * to consume resources "idly" (i.e. up to 85%) and then
75 * still have some room for "paid for" resource consumption.
77 #define GNUNET_CONSTANTS_IDLE_LOAD_THRESHOLD 70
80 * For how long do we allow unused bandwidth
81 * from the past to carry over into the future? (in seconds)
83 #define GNUNET_CONSTANTS_MAX_BANDWIDTH_CARRY_S 5
87 * After how long do we expire an address in a HELLO that we just
88 * validated? This value is also used for our own addresses when we
91 #define GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
95 * After how long do we expire an address in a HELLO that we just
96 * validated? This value is also used for our own addresses when we
99 #define GNUNET_CONSTANTS_DHT_MAX_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 24)
103 * Size of the 'struct EncryptedMessage' of the core (which
104 * is the per-message overhead of the core).
106 #define GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE (24 + sizeof (struct GNUNET_HashCode))
109 * What is the maximum size for encrypted messages? Note that this
110 * number imposes a clear limit on the maximum size of any message.
111 * Set to a value close to 64k but not so close that transports will
112 * have trouble with their headers.
114 * Could theoretically be 64k minus (GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE +
115 * GNUNET_CONSTANTS_TRANSPORT_SIZE_OUTBOUND_MESSAGE), but we're going
116 * to be more conservative for now.
118 #define GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE (63 * 1024)
121 * Largest block that can be stored in the DHT.
123 #define GNUNET_CONSTANTS_MAX_BLOCK_SIZE (62 * 1024)
127 * K-value that must be used for the bloom filters in 'GET'
130 #define GNUNET_CONSTANTS_BLOOMFILTER_K 16
135 #if 0 /* keep Emacsens' auto-indent happy */