ldb: max open files.

etc/sample.conf

@@ -1,4 +1,4 @@
-# Default bcoin config file (~/.bcoin/bcoin.conf)
+# Sample bcoin config file (~/.bcoin/bcoin.conf)
 
 # Options
 network: main
@@ -15,6 +15,7 @@ log-file: true
 # Node
 # prefix: ~/.bcoin
 db: leveldb
+max-files: 64
 # fast: false
 
 # Chain

lib/chain/chaindb.js

@@ -233,6 +233,7 @@ function ChainDB(chain, options) {
   this.db = bcoin.ldb({
     location: this.options.location,
     db: this.options.db,
+    maxOpenFiles: this.options.maxFiles,
     compression: true,
     cacheSize: 16 << 20,
     writeBufferSize: 8 << 20,

lib/db/ldb.js

@@ -29,19 +29,19 @@ var assert = utils.assert;
  */
 
 function ldb(options) {
-  options = ldb.parseOptions(options);
+  var target = ldb.getTarget(options);
 
-  if (options.backend !== 'rbt')
-    utils.mkdir(options.location, true);
+  if (target.backend !== 'rbt')
+    utils.mkdir(target.location, true);
 
-  return new LowlevelUp(options.location, {
+  return new LowlevelUp(target.location, {
     // LevelDB and others
     createIfMissing: options.createIfMissing !== false,
     errorIfExists: options.errorIfExists === true,
     compression: options.compression !== false,
     cacheSize: options.cacheSize || (8 << 20),
     writeBufferSize: options.writeBufferSize || (4 << 20),
-    maxOpenFiles: options.maxOpenFiles || 8192,
+    maxOpenFiles: options.maxOpenFiles || 64,
     filterBits: 0,
     paranoidChecks: false,
     memory: false,
@@ -54,7 +54,7 @@ function ldb(options) {
     // For browser buffer keys
     bufferKeys: options.bufferKeys,
 
-    db: options.db
+    db: target.db
   });
 }
 
@@ -103,12 +103,12 @@ ldb.getBackend = function getBackend(db) {
 };
 
 /**
- * Parse options.
+ * Get target backend and location.
  * @param {Object} options
  * @returns {Object}
  */
 
-ldb.parseOptions = function parseOptions(options) {
+ldb.getTarget = function getTarget(options) {
   var backend = ldb.getBackend(options.db);
   var location = options.location;
   var db;
@@ -125,12 +125,11 @@ ldb.parseOptions = function parseOptions(options) {
     location = 'rbt';
   }
 
-  return utils.merge({}, options, {
+  return {
+    db: db,
     backend: backend.name,
-    ext: backend.ext,
-    location: location + '.' + backend.ext,
-    db: db
-  });
+    location: location + '.' + backend.ext
+  };
 };
 
 /*

lib/node/config.js

@@ -133,6 +133,7 @@ config.parseData = function parseData(data) {
   // Node
   options.prefix = path(data.prefix);
   options.db = str(data.db);
+  options.maxFiles = num(data.maxfiles);
   options.fast = bool(data.fast);
 
   // Chain

lib/node/fullnode.js

@@ -66,7 +66,8 @@ function Fullnode(options) {
     useCheckpoints: this.options.useCheckpoints,
     coinCache: this.options.coinCache,
     indexTX: this.options.indexTX,
-    indexAddress: this.options.indexAddress
+    indexAddress: this.options.indexAddress,
+    maxFiles: this.options.maxFiles
   });
 
   // Fee estimation.
@@ -135,6 +136,7 @@ function Fullnode(options) {
     location: this.location('walletdb'),
     witness: this.options.witness,
     useCheckpoints: this.options.useCheckpoints,
+    maxFiles: this.options.maxFiles,
     verify: false
   });
 

lib/node/spvnode.js

@@ -48,6 +48,7 @@ function SPVNode(options) {
     location: this.location('spvchain'),
     witness: this.options.witness,
     useCheckpoints: this.options.useCheckpoints,
+    maxFiles: this.options.maxFiles,
     spv: true
   });
 
@@ -75,6 +76,7 @@ function SPVNode(options) {
     db: this.db,
     location: this.location('walletdb'),
     witness: this.options.witness,
+    maxFiles: this.options.maxFiles,
     verify: true
   });
 

lib/wallet/walletdb.js

@@ -190,6 +190,7 @@ function WalletDB(options) {
   this.db = bcoin.ldb({
     location: this.options.location,
     db: this.options.db,
+    maxOpenFiles: this.options.maxFiles,
     cacheSize: 8 << 20,
     writeBufferSize: 4 << 20,
     bufferKeys: true