Optimize default configuration for first use.

Author: evoskuil

data/bn.cfg

@@ -7,8 +7,8 @@ debug_file = debug.log
 error_file = error.log
 # The log archive directory, defaults to 'archive'.
 archive_directory = archive
-# The size at which a log is archived, defaults to 0 (disabled).
-rotation_size = 0
+# The size at which a log is archived, defaults to 10000000 (0 disables).
+rotation_size = 10000000
 # The minimum free space required in the archive directory, defaults to 0.
 minimum_free_space = 0
 # The maximum combined size of archived logs, defaults to 0 (maximum).
@@ -35,10 +35,10 @@ identifier = 3652501241
 validate_checksum = false
 # The port for incoming connections, defaults to 8333 (use 18333 for testnet).
 inbound_port = 8333
-# The target number of incoming network connections, defaults to 8.
-inbound_connections = 8
-# The target number of outgoing network connections, defaults to 8.
-outbound_connections = 8
+# The target number of incoming network connections, defaults to 0.
+inbound_connections = 0
+# The target number of outgoing network connections, defaults to 2.
+outbound_connections = 2
 # The attempt limit for manual connection establishment, defaults to 0 (forever).
 manual_attempt_limit = 0
 # The number of concurrent attempts to establish one connection, defaults to 5.
@@ -51,8 +51,8 @@ channel_handshake_seconds = 30
 channel_heartbeat_minutes = 5
 # The inactivity time limit for any connection, defaults to 30.
 channel_inactivity_minutes = 30
-# The age limit for any connection, defaults to 1440.
-channel_expiration_minutes = 1440
+# The age limit for any connection, defaults to 60.
+channel_expiration_minutes = 60
 # The time limit for obtaining seed addresses, defaults to 30.
 channel_germination_seconds = 30
 # The maximum number of peer hosts in the pool, defaults to 1000.
@@ -91,8 +91,8 @@ file_growth_rate = 50
 block_table_buckets = 650000
 # Transaction hash table size, defaults to 110000000.
 transaction_table_buckets = 110000000
-# The maximum number of entries in the unspent outputs cache, defaults to 0.
-cache_capacity = 0
+# The maximum number of entries in the unspent outputs cache, defaults to 10000.
+cache_capacity = 10000
 
 [blockchain]
 # The number of cores dedicated to block validation, defaults to 0 (physical cores).
@@ -154,7 +154,7 @@ bip90 = true
 block_poll_seconds = 1
 # The minimum fee per byte required for transaction acceptance, defaults to 1.
 minimum_byte_fee_satoshis = 1
-# Request that peers relay transactions, defaults to true.
-relay_transactions = true
+# Request that peers relay transactions, defaults to false.
+relay_transactions = false
 # Request transactions on each channel start, defaults to true.
 refresh_transactions = true

include/bitcoin/node/parser.hpp

@@ -33,7 +33,7 @@ class BCN_API parser
   : public config::parser
 {
 public:
-    parser(const config::settings& context);
+    parser(config::settings context);
     parser(const configuration& defaults);
 
     /// Parse all configuration into member settings.

src/parser.cpp

@@ -46,21 +46,21 @@ parser::parser(const configuration& defaults)
 }
 
 // Initialize configuration using defaults of the given context.
-parser::parser(const config::settings& context)
+parser::parser(config::settings context)
   : configured(context)
 {
-    // A node doesn't require history, and history is expensive.
+    // A node doesn't use history, and history is expensive.
     configured.database.index_start_height = max_uint32;
 
-    // A node allows 8 inbound connections by default.
-    configured.network.inbound_connections = 8;
+    // Logs will slow things if not rotated.
+    configured.network.rotation_size = 10000000;
+
+    // With block-first sync the count should be low until complete.
+    configured.network.outbound_connections = 2;
 
     // A node allows 1000 host names by default.
     configured.network.host_pool_capacity = 1000;
 
-    // A node requests transaction relay by default.
-    configured.network.relay_transactions = true;
-
     // A node exposes full node (1) network services by default.
     configured.network.services = message::version::service::node_network;
 }
@@ -149,7 +149,7 @@ options_metadata parser::load_settings()
     (
         "log.rotation_size",
         value<size_t>(&configured.network.rotation_size),
-        "The size at which a log is archived, defaults to 0 (disabled)."
+        "The size at which a log is archived, defaults to 10000000 (0 disables)."
     )
     (
         "log.minimum_free_space",
@@ -215,12 +215,12 @@ options_metadata parser::load_settings()
     (
         "network.inbound_connections",
         value<uint32_t>(&configured.network.inbound_connections),
-        "The target number of incoming network connections, defaults to 8."
+        "The target number of incoming network connections, defaults to 0."
     )
     (
         "network.outbound_connections",
         value<uint32_t>(&configured.network.outbound_connections),
-        "The target number of outgoing network connections, defaults to 8."
+        "The target number of outgoing network connections, defaults to 2."
     )
     (
         "network.manual_attempt_limit",
@@ -255,7 +255,7 @@ options_metadata parser::load_settings()
     (
         "network.channel_expiration_minutes",
         value<uint32_t>(&configured.network.channel_expiration_minutes),
-        "The age limit for any connection, defaults to 1440."
+        "The age limit for any connection, defaults to 60."
     )
     (
         "network.channel_germination_seconds",
@@ -322,7 +322,7 @@ options_metadata parser::load_settings()
     (
         "database.cache_capacity",
         value<uint32_t>(&configured.database.cache_capacity),
-        "The maximum number of entries in the unspent outputs cache, defaults to 0."
+        "The maximum number of entries in the unspent outputs cache, defaults to 10000."
     )
 
     /* [blockchain] */
@@ -395,38 +395,38 @@ options_metadata parser::load_settings()
     )
 
     /* [node] */
-    (
-        "node.sync_peers",
-        value<uint32_t>(&configured.node.sync_peers),
-        "The maximum number of initial block download peers, defaults to 0 (physical cores)."
-    )
-    (
-        "node.sync_timeout_seconds",
-        value<uint32_t>(&configured.node.sync_timeout_seconds),
-        "The time limit for block response during initial block download, defaults to 5."
-    )
+    ////(
+    ////    "node.sync_peers",
+    ////    value<uint32_t>(&configured.node.sync_peers),
+    ////    "The maximum number of initial block download peers, defaults to 0 (physical cores)."
+    ////)
+    ////(
+    ////    "node.sync_timeout_seconds",
+    ////    value<uint32_t>(&configured.node.sync_timeout_seconds),
+    ////    "The time limit for block response during initial block download, defaults to 5."
+    ////)
     (
         "node.block_poll_seconds",
         value<uint32_t>(&configured.node.block_poll_seconds),
         "The time period for block polling after initial block download, defaults to 1 (0 disables)."
     )
     (
-        /* Internally this is blockchain, but it is conceptually a node setting.*/
+        /* Internally this is blockchain, but it is conceptually a node setting. */
         "node.minimum_byte_fee_satoshis",
         value<float>(&configured.chain.minimum_byte_fee_satoshis),
         "The minimum fee per byte required for transaction acceptance, defaults to 1."
     )
     ////(
-    ////    /* Internally this blockchain, but it is conceptually a node setting.*/
+    ////    /* Internally this blockchain, but it is conceptually a node setting. */
     ////    "node.reject_conflicts",
     ////    value<bool>(&configured.chain.reject_conflicts),
     ////    "Retain only the first seen of conflicting transactions, defaults to true."
     ////)
     (
-        /* Internally this network, but it is conceptually a node setting.*/
+        /* Internally this network, but it is conceptually a node setting. */
         "node.relay_transactions",
         value<bool>(&configured.network.relay_transactions),
-        "Request that peers relay transactions, defaults to true."
+        "Request that peers relay transactions, defaults to false."
     )
     (
         "node.refresh_transactions",