Enabled ssh compression by default, increased conn_bufsize.

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@88 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/CHANGELOG

 New in v0.7.5 (2002/06/01)
 --------------------------
 
+After a bit of empirical testing, increased Globals.conn_bufsize and
+enabled ssh compression by default.  This should speed up the
+"typical" remote session.
+
 Fixed bug noticed by Dean Gaudet in processing of
 --(include|exclude)-filelist[-stdin] options when source directory was
 remote.

trunk/rdiff-backup/rdiff-backup.1

@@ -245,6 +245,12 @@ number of seconds ago.  Otherwise start a new backup.  The default is
 Enter server mode (not to be invoked directly, but instead used by
 another rdiff-backup process on a remote computer).
 .TP
+.B --ssh-no-compression
+When running ssh, do not use the -C option to enable compression.
+.B --ssh-no-compression
+is ignored if you specify a new schema using
+.B --remote-schema.
+.TP
 .BI "--terminal-verbosity " [0-9]
 Select which messages will be displayed to the terminal.  If missing
 the level defaults to the verbosity level.

trunk/rdiff-backup/rdiff_backup/rpath.py

@@ -247,13 +247,13 @@ class RORPath(RPathStatic):
 		This object doesn't contain any information about the file,
 		but, when passed along, may show where the previous stages are
 		in their processing.  It is the RORPath equivalent of fiber.
+		This placeholder size, in conjunction with the placeholder
+		threshold in Highlevel .. generate_dissimilar seem to yield an
+		OK tradeoff between unnecessary placeholders and lots of
+		memory usage, but I'm not sure exactly why.
 
 		"""
-		self.data = {'placeholder':
-					 ("It is actually good for placeholders to use"
-					  "up a bit of memory, so the buffers get flushed"
-					  "more often when placeholders move through."
-					  "See the get_dissimilar docs for more info.")}
+		self.data = {'placeholder': " "*500}
 
 	def isplaceholder(self):
 		"""True if the object is a placeholder"""

trunk/rdiff-backup/src/globals.py

@@ -20,7 +20,7 @@ class Globals:
 	# This is used by the BufferedRead class to determine how many
 	# bytes to request from the underlying file per read().  Larger
 	# values may save on connection overhead and latency.
-	conn_bufsize = 4096
+	conn_bufsize = 98304
 
 	# True if script is running as a server
 	server = None
@@ -139,6 +139,9 @@ class Globals:
 							"jpg|gif|png|jp2|mp3|ogg|avi|wmv|mpeg|mpg|rm|mov)$"
 	no_compression_regexp = None
 
+	# Determines whether or not ssh will be run with the -C switch
+	ssh_compression = 1
+
 	# On the reader and writer connections, the following will be
 	# replaced by the source and mirror Select objects respectively.
 	select_source, select_mirror = None, None

trunk/rdiff-backup/src/main.py

@@ -36,8 +36,9 @@ class Main:
 			  "parsable-output", "quoting-char=", "remote-cmd=",
 			  "remote-schema=", "remove-older-than=",
 			  "restore-as-of=", "resume", "resume-window=", "server",
-			  "terminal-verbosity=", "test-server", "verbosity",
-			  "version", "windows-mode", "windows-time-format"])
+			  "ssh-no-compression", "terminal-verbosity=",
+			  "test-server", "verbosity", "version", "windows-mode",
+			  "windows-time-format"])
 		except getopt.error, e:
 			self.commandline_error("Bad commandline options: %s" % str(e))
 
@@ -100,6 +101,8 @@ class Main:
 			elif opt == '--resume-window':
 				Globals.set_integer('resume_window', arg)
 			elif opt == "-s" or opt == "--server": self.action = "server"
+			elif opt == "--ssh-no-compression":
+				Globals.set('ssh_compression', None)
 			elif opt == "--terminal-verbosity": Log.setterm_verbosity(arg)
 			elif opt == "--test-server": self.action = "test-server"
 			elif opt == "-V" or opt == "--version":

trunk/rdiff-backup/src/rpath.py

@@ -247,13 +247,13 @@ class RORPath(RPathStatic):
 		This object doesn't contain any information about the file,
 		but, when passed along, may show where the previous stages are
 		in their processing.  It is the RORPath equivalent of fiber.
+		This placeholder size, in conjunction with the placeholder
+		threshold in Highlevel .. generate_dissimilar seem to yield an
+		OK tradeoff between unnecessary placeholders and lots of
+		memory usage, but I'm not sure exactly why.
 
 		"""
-		self.data = {'placeholder':
-					 ("It is actually good for placeholders to use"
-					  "up a bit of memory, so the buffers get flushed"
-					  "more often when placeholders move through."
-					  "See the get_dissimilar docs for more info.")}
+		self.data = {'placeholder': " "*500}
 
 	def isplaceholder(self):
 		"""True if the object is a placeholder"""

trunk/rdiff-backup/src/setconnections.py

@@ -16,9 +16,10 @@ class SetConnections:
 
 	"""
 	# This is the schema that determines how rdiff-backup will open a
-	# pipe to the remote system.  If the file is given as A:B, %s will
+	# pipe to the remote system.  If the file is given as A::B, %s will
 	# be substituted with A in the schema.
-	__cmd_schema = 'ssh %s rdiff-backup --server'
+	__cmd_schema = 'ssh -C %s rdiff-backup --server'
+	__cmd_schema_no_compress = 'ssh %s rdiff-backup --server'
 
 	# This is a list of remote commands used to start the connections.
 	# The first is None because it is the local connection.
@@ -27,6 +28,9 @@ class SetConnections:
 	def InitRPs(cls, arglist, remote_schema = None, remote_cmd = None):
 		"""Map the given file descriptions into rpaths and return list"""
 		if remote_schema: cls.__cmd_schema = remote_schema
+		elif not Globals.ssh_compression:
+			cls.__cmd_schema = cls.__cmd_schema_no_compress
+
 		if not arglist: return []
 		desc_pairs = map(cls.parse_file_desc, arglist)