• optimized transfers (only changed sections of files transferred)
  
  
• pipelined. Connections are established and used for all transfers.
  
  
• compressed data transfer
  
  
• directly from the home machine of the source pool.
  
  

• CVSup requires modula-3 compiler and libraries, (although some pre-built
  binaries may be available for your machine and O/S.)
  
  
• Requires a special daemon running on the host machine.
  
  

• It is a "mini" utility, a single C source file.
  
  
• meant to be easily compiled with a one-line gcc command on most systems.
  
  
• free from Mib Software
  
  
• Transfers only the files which differ
  
  
• Permits subsets of entire trees to be distributed. (For example:
  sources-only (no docs), docs-only (no sources), etc.)
  
  
• Tree can be kept or mirrored on any http/1.0 server.
  
  

• Not as feature-rich as CVSup. This is bare bones synchronization.
  
  
• Up to 30 minute delay from the INN home source pool.
  
  
• Not able to optimize and transfer sections of files.
  
  
• Files are not transfered with compression
  
  

	    ftp://ftp.isc.org/isc/inn/snapshots

• They should be updated once per day, but this is not always true. (Update: they seem to be working just fine since late April 1998.)
  
  
• Any change requires the transfer, unzipping, and tar extraction of all files
  
  

Examine in depth