Syncthing creating hash update#
Syncthing creating hash full#
Syncthing creating hash android#

Only one of them will be pulled, and the other one marked with anĪppropriate error message. Remote devices share differing case variants to your local device, Will be reported as a case conflict by Syncthing. Thus, if a remote device shares a file which would clash with anĮxisting local file, it cannot be synchronized to such a system and Treating them as the same file (or directory) and can never have both

Syncthing creating hash android#

Windows, Mac and Android to an extent) assume the opposite, That file.txt and FILE.txt denote two independent things.Ĭonsequently, it never considers both as if they were somehow relatedįor synchronizing their contents. In principle, Syncthing works with case-sensitive paths, meaning One device, creating the sync-conflict file, but it’s just as much of aĬonflict everywhere else and we don’t know which of the conflicting files is the We do this because the conflict is detected and resolved on Resurrected without renaming on the device where it was deleted.įiles are treated as normal files after they are created, so they are propagatedīetween devices. Modification and a deletion of the file, the modified file always wins and is ID will be marked as the conflicting file. If the modification times are equal, the file originatingįrom the device which has the larger value of the first 63 bits for its device The file with the older modification time will be marked as the conflicting fileĪnd thus be renamed. When a file has been modified on twoĭevices simultaneously and the content actually differs, one of the files will The block lists are compared to build a list of neededīlocks, which are then requested from the network or copied locally, as Which version for each file should be the global version, and compares this When new index data is received from other devices Syncthing recalculates X.y.z which may not be exactly the version of Syncthing you’re running). This information is kept in the index database, which is stored in theĬonfiguration directory and called index-vx.y.z.db (for some version One that each device strives to be up to date with. This version is called the global version and is the Syncthing keeps track of several versions of each file - the version that itĬurrently has on disk, called the local version, the versions announced byĪll other connected devices, and the “best” (usually the most recent) Slight delay between making the change and it appearing on another device.Ĭhanges that were detected and hashed are transmitted to the other devices Therefore it is expected that you experience a ItĪccumulates changes for 10s (adjustable by fsWatcherDelayS) and deleted filesĪre further delayed for 1min. The watcher does not immediately schedule a scan when a change is detected. Parts of a file have changed without reading the file and computing new SHA256 New block list is calculated for the file. Theįile is “rehashed” if a change is detected based on those attributes, that is a

Syncthing creating hash full#

Even with watcherĮnabled it is advised to keep regular full scans enabled, as it is possible thatĭuring a rescan (regardless whether full or from watcher) the existing files areĬhecked for changes to their modification time, size or permission bits. Random time between 3/4 and 5/4 of the given scan interval. Not all folders are rescanned at the same time, the actual scan interval is a Useful for example on large folders that change infrequently. Increasing the full scan interval uses less resources and is

Watcher is enabled and full scans are done once per hour. There are two methods how Syncthing detects changes: By regular full scans andīy notifications received from the filesystem (“watcher”). Syncthing tries to find another source for the block. Written to a temporary copy of the file, otherwise it is discarded and When a block is copied or received from another device, its SHA256 hash isĬomputed and compared with the expected value. On disk, in the second case it is requested over the network from the other In the first case the block is simply copied If another file already has a block with the same hash, or it may be fromĪnother device in the cluster.

Tries to find a source for each block that differs. Of the file to the block list of the desired version of the file.

Syncthing creating hash update#

To update a file, Syncthing compares the block list of the current version Offset, size and hash of all blocks in the file. This results in a block list containing the Size is dependent on the file size and varies from 128 KiB up to 16 MiB.Įach file is sliced into a number of these blocks, and the SHA256 hash ofĮach block is computed.

Same size (except the last one in the file which may be smaller). This article describes the mechanisms Syncthing uses to bring files in syncįiles are divided into blocks.