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The rsync algorithm is a type of delta encoding, and is used for minimizing network usage. Zstandard, LZ4, or Zlib may be used for additional data compression, [8] and SSH or stunnel can be used for security. rsync is typically used for synchronizing files and directories between two different systems.
Rsync requires their correct use. [97] Rclone filters require the use of ** to refer to the contents of a directory. Rsync does not. [98] Eponymous cloud storage service rsync.net provides remote unix filesystems so that customers can run rsync and other standard Unix tools. [99] They also offer rclone only accounts. [100]
With delta copying, only the changed part of a file is copied. It is usually used in backup or file copying software, often to save bandwidth when copying between computers over a private network or the internet. One notable open-source example is rsync. [2] [3] [4]
cwRsync is an implementation of rsync for Windows.Rsync uses a file transfer technology specified by the rsync algorithm, transferring only changed chunks of files over the network in a given time. cwRsync can be used for remote file backup and synchronization from/to Windows systems. cwRsync contains Cygwin DLLs and a compiled version of rsync on Cygwin.
According to the creator Lennart Poettering, casync is inspired by rsync and Git, [4] as well as tar. [5] casync is aimed to be used for Internet of things (IoT), container, virtual machine (VM), portable services, and operating system (OS) images, as well as backups and home directory synchronization.
There are tools available for file synchronization, version control (CVS, Subversion, etc.), distributed filesystems (Coda, etc.), and mirroring (rsync, etc.), in that all these attempt to keep sets of files synchronized. However, only version control and file synchronization tools can deal with modifications to more than one copy of the files.
They use one of two transport layer protocols: the Transmission Control Protocol (TCP) or the User Datagram Protocol (UDP). In the tables below, the "Transport" column indicates which protocol(s) the transfer protocol uses at the transport layer. Some protocols designed to transmit data over UDP also use a TCP port for oversight.
Best results occur when one has knowledge of the data being compared and other constraints: diff is designed for line-oriented text files, particularly source code, and works best for these; the rsync algorithm is used based on source and target being across a network from each other and communication being slow, so it minimizes data that must ...