## Major changes in 2.0
- Database backend switched from LevelDB to SQLite. There is a migration on
first launch which can be lengthy for larger setups. The new database is
easier to understand and maintain and, hopefully, less buggy.
- The logging format has changed to use structured log entries (a message
plus several key-value pairs). Additionally, we can now control the log
level per package, and a new log level WARNING has been inserted between
INFO and ERROR (which was previously known as WARNING...). The INFO level
has become more verbose, indicating the sync actions taken by Syncthing. A
new command line flag `--log-level` sets the default log level for all
packages, and the `STTRACE` environment variable and GUI has been updated
to set log levels per package. The `--verbose` and `--logflags` command
line options have been removed and will be ignored if given.
- Deleted items are no longer kept forever in the database, instead they are
forgotten after fifteen months. If your use case require deletes to take
effect after more than a fifteen month delay, set the
`--db-delete-retention-interval` command line option or corresponding
environment variable to zero, or a longer time interval of your choosing.
- Modernised command line options parsing. Old single-dash long options are
no longer supported, e.g. `-home` must be given as `--home`. Some options
have been renamed, others have become subcommands. All serve options are
now also accepted as environment variables. See `syncthing --help` and
`syncthing serve --help` for details.
- Rolling hash detection of shifted data is no longer supported as this
effectively never helped. Instead, scanning and syncing is faster and more
efficient without it.
- A "default folder" is no longer created on first startup.
- Multiple connections are now used by default between v2 devices. The new
default value is to use three connections: one for index metadata and two
for data exchange.
- The following platforms unfortunately no longer get prebuilt binaries for
download at syncthing.net and on GitHub, due to complexities related to
cross compilation with SQLite:
- dragonfly/amd64
- illumos/amd64 and solaris/amd64
- linux/ppc64
- netbsd/*
- openbsd/386 and openbsd/arm
- windows/arm
- The handling of conflict resolution involving deleted files has changed. A
delete can now be the winning outcome of conflict resolution, resulting in
the deleted file being moved to a conflict copy.
This release is also available as:
* APT repository: https://apt.syncthing.net/
* Docker image: `docker.io/syncthing/syncthing:2.0.6` or `ghcr.io/syncthing/syncthing:2.0.6`
(`{docker,ghcr}.io/syncthing/syncthing:2` to follow just the major version)
## What's Changed
### Fixes
* fix(db): remove temp_store = MEMORY pragmas by @calmh in https://github.com/syncthing/syncthing/pull/10343
**Full Changelog**: https://github.com/syncthing/syncthing/compare/v2.0.5...v2.0.6