There is a flow control in the script that will see how many cores your system has and will keep the number of rsyncs running at any given time down to a reasonable number, so not to kill your machine. And then another rsync to pick up whatever files were left above that level. The workaround I am suggesting is to, basically, launch a separate rsync for every subfolder down to a certain level. The reason for that lies in rsync‘s single-threaded nature. You may have a 10-gig network and rsync seems to be busy moving files, but your network utilization is a tiny fraction of the available bandwidth. However, when the files are small and many and spread throughout a deep directory structure – this is when rsync grinds to a virtual halt. This is not an issue when files are few and large. Here’s the problem with rsync: it’s a single-threaded process that needs to crawl the source and the destination directories in their entirety, build lists of folders and files, compare them, and then start transferring the discovered items: one by one. ![]() What’s new: more efficient subfolder crawling, more effective way to launch rsync threads, ability to specify options from command line. That is why it is very important to execute a simulated run ( -dry-run) and inspect what happens before a real run.This is an update of the script I originally wrote five years ago and used to migrate many terabytes of production data between two NAS systems. And RsyncOSX will not stop you for doing so. Setting wrong parameters to rsync can result in deleted data. The main objective is to ease the use of rsync, not teach macOS users how to use it. The UI of RsyncOSX can for users who dont know rsync, be difficult or complex to understand. The main purpose is to assist and ease the use of rsync to synchronize files on your Mac to remote FreeBSD and Linux servers or to a local attached disk. RsyncOSX is not developed to be an easy to use synchronize and backup tool. One of many advantages of utilizing rsync is that it can restart and continue the synchronize task from where it was aborted. ![]() If not RsyncOSX might become unresponsive. Please let the abort to finish and cleanup before starting a new task. RsyncOSX is monitoring the task for progress and termination. Please be aware it is an external task not controlled by RsyncOSX, which executes the command line tool rsync. A disabled parameter can be enabled again. If you decide to disable a default parameter, be sure you understand what the result is. If you by accident set an empty catalog as source, RsyncOSX (rsync) will delete all files in the destination.ĭefault parameters set by RsyncOSX to rsync can be disabled task by task. ![]() Every time you add a new task to RsyncOSX, execute an estimation run and inspect the result before executing a real run. The parameter instructs rsync to delete all files in the destination which are not present in the source. The parameter instructs rsync too keep the source and destination in sync. The -delete parameter is a default parameter set by RsyncOSX to rsync. ![]() It is rsync which does actual work, not RsyncOSX. RsyncOSX is a GUI only on top of the command line tool. If you are new to the command line tool rsync and RsyncOSX please read this information.
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