9/20/2023 0 Comments Bvckup 2Quite a few opportunities for getting your backup routine in trouble. The reason it needs to be used with care is that it can chew through available disk space *like that* if the archive trimming is off, if the backup is run too often, if modified files are really large, etc. Obviously, this is a form of file versioning. In other words, the app will move file's backup copy to the archive and then re-copy the original in full to create new backup copy. It is now possible to set the app to archive existing backup copy of a file before updating it. Support for archiving past versions of modified files The app now also logs I/O throughput, both for per-file and for per-run. Is pretty much a golden standard of I/O performance on Windows 8 With all things combined, the bulk throughput in both cold and warm cache cases is marginally better (5-10%) than that of robocopy, which It'd be a good idea in the disk I/O context. Issue 2 requests, then 3 and so up to the maximum number of It used to first issue 1 read request, wait for it to complete, then The app no longer uses the slow-start reading routine, whereby This is done only if destination file exists.Į. With staged copying, the file is first copied into a temporaryįile at destination, which is then renamed in place. File that are copied in full no longer use staged copying if Meaning that files under 2MB are nowĪgain, this is configurable via the. Threshold for delta copying a file is now 2 Megs instead ofġ28K from before. Overridden to be "flush always" or "flush never".Ĭ. The flushing behavior is configurable via. Significant delays when backing up from the network to a Previously, it has always flushed the cache and it led to The app now does NOT explicitly flush the write cache uponĬompleting the copying of a file *unless* destination is a Understands locations residing on the same *physical*ĭisk and includes special handling of USB drivesī. Version of SMB protocol used to access remote shares, The app now takes into account both the type and relativeĭisposition of the source and destination when selecting The ultimate goal of testing was to determine optimal sizes of read and write requests, the total number of I/O buffers as well as to fine-tune the copying pipeline in general.Īs a result the following are the changes in R72:Ī. Tests covered different common setups, including same-drive backups, different drive backups, backing up local to/from USB2, local and USB3, local and a network share over SMB1 and over SMB2, over gigabit links and over WiFi, with warm cache and with cold cache, etc. This is a result of a couple of weeks worth of performance testing.
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