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.

• Deleted items are no longer kept forever in the database, instead they are
  forgotten after six months. If your use case require deletes to take
  effect after more than a six 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:2.0.0-rc.23 or ghcr.io/syncthing/syncthing:2.0.0-rc.23
  ({docker,ghcr}.io/syncthing/syncthing:2 to follow just the major version)

What's Changed

Fixes

• fix(db): handle large numbers of blocks in update by @calmh in #10025
• fix(syncthing): make directory flags global for all commands by @calmh in #10028
• fix(sqlite): apply options by @pixelspark in #10049
• fix(db): version vector serialisation :( by @calmh in #10050
• fix(model): loop-break regression while block copying in puller by @imsodin in #10069
• fix(model): close fd immediately in copier by @imsodin in #10079
• fix(model): use same folder first in copier by @imsodin in #10093
• fix(model): correct bufferpool handling; simplify by @calmh in #10113
• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140
• fix(syncthing): avoid writing panic log to nil fd by @ardevd in #10154
• fix(fs): check for unsupported error on modern Windows (fixes #10164) by @rasa in #10165
• fix(gui): don't show dial errors for paused devices (fixes #10166) by @marbens-arch in #10167
• fix: track invalid files in LocalFlags to fix global count by @imsodin in #10170
• fix(watchaggregator): properly handle sub-second watch durations (fixes #9927) by @imsodin in #10179
• fix(db): remove invalid member from FileMetadata by @imsodin in #10180
• fix(model): avoid flashing "Sync Waiting" unnecessarily by @calmh in #10181
• fix(protocol): slightly loosen/correct ownership comparison criteria (fixes #9879) by @yparitcher in #10176
• fix(model): don't clobber local flags when receiving index by @calmh in #10190
• fix(beacon, osutil, upnp): fix local discovery send and intf detection on Android by @Catfriend1 in #10196
• fix(pmp, netutil): workaround native code denied to discover gateway ipv4 addr on Android 14+ by @Catfriend1 in #10204
• fix: allow deleted files to win conflict resolution by @calmh in #10207

Features

• feat: add syncthing debug database-statistics command by @calmh in #10117
• feat(config): enable multiple connections by default by @calmh in #10151
• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148
• feat: use Ed25519 keys for sync connections by @calmh in #10162
• feat(gui): add option to limit bandwidth in LAN to Settings (ref #10046) by @tomasz1986 in #10182
• feat(connections, nat): add UDP portmapping/pinhole for QUIC (fixes #7403) by @marbens-arch in #10171
• feat: add debug commands for folder counts and files by @calmh in #10206

Other

• chore: remove abandoned next-gen-gui experiment by @calmh in #10004
• chore: remove weak hashing which does not pull its weight by @calmh in #10005
• chore: switch database engine to sqlite (fixes #9954) by @calmh in #9965
• chore: harmonise command line flags by @calmh in #10007
• chore(db): increase journal limit to 64MiB by @bt90 in #10022
• chore: forget deleted files older than six months (fixes #6284) by @calmh in #10023
• chore(db): use shorter read transactions and periodic checkpoint for smaller WAL by @calmh in #10027
• chore: configurable delete retention interval by @calmh in #10030
• chore(db): fix debug logging by @bt90 in #10033
• chore(db): buffer pulled files for smaller WAL by @calmh in #10036
• chore(db): use one SQLite database per folder by @calmh in #10042
• chore(model): delay starting a pull while there are incoming index updates by @calmh in #10041
• chore(syncthing): remove "default" folder concept by @calmh in #10068
• chore(syncthing): ensure migrated database is closed before exiting by @xjtdy888 in #10076
• chore(db, model): simplify per hash DB lookup in copier by @imsodin in #10080
• chore(model): refactor copier for more flatness by @imsodin in #10094
• build: upgrade setup-zig action by @calmh in #10134
• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145
• chore: various linter fixes by @calmh in #10157
• build: streamline gathering of facts, checkouts by @calmh in #10158
• build: build both Debian armel and armhf (though they are the same for us) by @calmh in #10159
• build: explicitly trigger build after pushing release tag by @calmh in #10160
• chore(syncthing): ensure response body is closed in upgrade request by @ardevd in #10169
• refactor(syncthing): use named constant for SIGHUP by @ardevd in #10168
• chore(model): remove redundant removal of internal fields in indexsender by @imsodin in #10173
• chore: add migration for remote invalid local flag by @imsodin in #10174
• chore(config): increase max concurrent writes default by @imsodin in #10200
• chore(gui): added spacing between folder name and error message by @ardevd in #10201
• build: unset build ID in generated binaries by @Catfriend1 in #10203
• chore(protocol): minor cleanup of ClusterConfig messages; remove DisableTempIndexes option by @calmh in #10202

New Contributors

• @ardevd made their first contribution in #10154
• @yparitcher made their first contribution in #10176

Full Changelog: v1.29.7...v2.0.0-rc.23

Syncthing 2 is coming

Syncthing version 1.x will soon be replaced by Syncthing version 2.x.
Version 2 brings a new database format and various cleanups, but remains
protocol compatible with Syncthing 1.

More detailed information about Syncthing 2 can be found in the release
notes at https://github.com/syncthing/syncthing/releases.

This release is also available as:

• APT repository: https://apt.syncthing.net/

• Docker image: docker.io/syncthing/syncthing:1.30.0 or ghcr.io/syncthing/syncthing:1.30.0
  ({docker,ghcr}.io/syncthing/syncthing:1 to follow just the major version)

What's Changed

Fixes

• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140
• fix(syncthing): avoid writing panic log to nil fd by @ardevd in #10154

Features

• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148

Other

• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145

Full Changelog: v1.29.7...v1.30.0

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.

• Deleted items are no longer kept forever in the database, instead they are
  forgotten after six months. If your use case require deletes to take
  effect after more than a six 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

This release is also available as:

• APT repository: https://apt.syncthing.net/

• Docker image: docker.io/syncthing/syncthing:2.0.0-rc.22 or ghcr.io/syncthing/syncthing:2.0.0-rc.22
  ({docker,ghcr}.io/syncthing/syncthing:2 to follow just the major version)

What's Changed

Fixes

• fix(db): handle large numbers of blocks in update by @calmh in #10025
• fix(syncthing): make directory flags global for all commands by @calmh in #10028
• fix(sqlite): apply options by @pixelspark in #10049
• fix(db): version vector serialisation :( by @calmh in #10050
• fix(model): loop-break regression while block copying in puller by @imsodin in #10069
• fix(model): close fd immediately in copier by @imsodin in #10079
• fix(model): use same folder first in copier by @imsodin in #10093
• fix(model): correct bufferpool handling; simplify by @calmh in #10113
• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140
• fix(syncthing): avoid writing panic log to nil fd by @ardevd in #10154
• fix(fs): check for unsupported error on modern Windows (fixes #10164) by @rasa in #10165
• fix(gui): don't show dial errors for paused devices (fixes #10166) by @marbens-arch in #10167
• fix: track invalid files in LocalFlags to fix global count by @imsodin in #10170
• fix(watchaggregator): properly handle sub-second watch durations (fixes #9927) by @imsodin in #10179
• fix(db): remove invalid member from FileMetadata by @imsodin in #10180
• fix(model): avoid flashing "Sync Waiting" unnecessarily by @calmh in #10181
• fix(protocol): slightly loosen/correct ownership comparison criteria (fixes #9879) by @yparitcher in #10176
• fix(model): don't clobber local flags when receiving index by @calmh in #10190

Features

• feat: add syncthing debug database-statistics command by @calmh in #10117
• feat(config): enable multiple connections by default by @calmh in #10151
• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148
• feat: use Ed25519 keys for sync connections by @calmh in #10162
• feat(gui): add option to limit bandwidth in LAN to Settings (ref #10046) by @tomasz1986 in #10182
• feat(connections, nat): add UDP portmapping/pinhole for QUIC (fixes #7403) by @marbens-arch in #10171

Other

• chore: remove abandoned next-gen-gui experiment by @calmh in #10004
• chore: remove weak hashing which does not pull its weight by @calmh in #10005
• chore: switch database engine to sqlite (fixes #9954) by @calmh in #9965
• chore: harmonise command line flags by @calmh in #10007
• chore(db): increase journal limit to 64MiB by @bt90 in #10022
• chore: forget deleted files older than six months (fixes #6284) by @calmh in #10023
• chore(db): use shorter read transactions and periodic checkpoint for smaller WAL by @calmh in #10027
• chore: configurable delete retention interval by @calmh in #10030
• chore(db): fix debug logging by @bt90 in #10033
• chore(db): buffer pulled files for smaller WAL by @calmh in #10036
• chore(db): use one SQLite database per folder by @calmh in #10042
• chore(model): delay starting a pull while there are incoming index updates by @calmh in #10041
• chore(syncthing): remove "default" folder concept by @calmh in #10068
• chore(syncthing): ensure migrated database is closed before exiting by @xjtdy888 in #10076
• chore(db, model): simplify per hash DB lookup in copier by @imsodin in #10080
• chore(model): refactor copier for more flatness by @imsodin in #10094
• build: upgrade setup-zig action by @calmh in #10134
• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145
• chore: various linter fixes by @calmh in #10157
• build: streamline gathering of facts, checkouts by @calmh in #10158
• build: build both Debian armel and armhf (though they are the same for us) by @calmh in #10159
• build: explicitly trigger build after pushing release tag by @calmh in #10160
• chore(syncthing): ensure response body is closed in upgrade request by @ardevd in #10169
• refactor(syncthing): use named constant for SIGHUP by @ardevd in #10168
• chore(model): remove redundant removal of internal fields in indexsender by @imsodin in #10173
• chore: add migration for remote invalid local flag by @imsodin in #10174

New Contributors

• @ardevd made their first contribution in #10154
• @yparitcher made their first contribution in #10176

Full Changelog: v1.29.7...v2.0.0-rc.22

Syncthing 2 is coming

Syncthing version 1.x will soon be replaced by Syncthing version 2.x.
Version 2 brings a new database format and various cleanups, but remains
protocol compatible with Syncthing 1.

More detailed information about Syncthing 2 can be found in the release
notes at https://github.com/syncthing/syncthing/releases.

This release is also available as:

• APT repository: https://apt.syncthing.net/

• Docker image: docker.io/syncthing/syncthing:1.30.0-rc.2 or ghcr.io/syncthing/syncthing:1.30.0-rc.2
  ({docker,ghcr}.io/syncthing/syncthing:1 to follow just the major version)

What's Changed

Fixes

• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140
• fix(syncthing): avoid writing panic log to nil fd by @ardevd in #10154

Features

• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148

Other

• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145

Full Changelog: v1.29.7...v1.30.0-rc.2

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.

• Deleted items are no longer kept forever in the database, instead they are
  forgotten after six months. If your use case require deletes to take
  effect after more than a six 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

This release is also available as:

• APT repository: https://apt.syncthing.net/

• Docker image: docker.io/syncthing/syncthing:2.0.0-rc.21 or ghcr.io/syncthing/syncthing:2.0.0-rc.21
  ({docker,ghcr}.io/syncthing/syncthing:2 to follow just the major version)

What's Changed

Fixes

• fix(db): handle large numbers of blocks in update by @calmh in #10025
• fix(syncthing): make directory flags global for all commands by @calmh in #10028
• fix(sqlite): apply options by @pixelspark in #10049
• fix(db): version vector serialisation :( by @calmh in #10050
• fix(model): loop-break regression while block copying in puller by @imsodin in #10069
• fix(model): close fd immediately in copier by @imsodin in #10079
• fix(model): use same folder first in copier by @imsodin in #10093
• fix(model): correct bufferpool handling; simplify by @calmh in #10113
• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140
• fix(syncthing): avoid writing panic log to nil fd by @ardevd in #10154
• fix(fs): check for unsupported error on modern Windows (fixes #10164) by @rasa in #10165
• fix(gui): don't show dial errors for paused devices (fixes #10166) by @marbens-arch in #10167
• fix: track invalid files in LocalFlags to fix global count by @imsodin in #10170
• fix(watchaggregator): properly handle sub-second watch durations (fixes #9927) by @imsodin in #10179
• fix(db): remove invalid member from FileMetadata by @imsodin in #10180

Features

• feat: add syncthing debug database-statistics command by @calmh in #10117
• feat(config): enable multiple connections by default by @calmh in #10151
• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148
• feat: use Ed25519 keys for sync connections by @calmh in #10162

Other

• chore: remove abandoned next-gen-gui experiment by @calmh in #10004
• chore: remove weak hashing which does not pull its weight by @calmh in #10005
• chore: switch database engine to sqlite (fixes #9954) by @calmh in #9965
• chore: harmonise command line flags by @calmh in #10007
• chore(db): increase journal limit to 64MiB by @bt90 in #10022
• chore: forget deleted files older than six months (fixes #6284) by @calmh in #10023
• chore(db): use shorter read transactions and periodic checkpoint for smaller WAL by @calmh in #10027
• chore: configurable delete retention interval by @calmh in #10030
• chore(db): fix debug logging by @bt90 in #10033
• chore(db): buffer pulled files for smaller WAL by @calmh in #10036
• chore(db): use one SQLite database per folder by @calmh in #10042
• chore(model): delay starting a pull while there are incoming index updates by @calmh in #10041
• chore(syncthing): remove "default" folder concept by @calmh in #10068
• chore(syncthing): ensure migrated database is closed before exiting by @xjtdy888 in #10076
• chore(db, model): simplify per hash DB lookup in copier by @imsodin in #10080
• chore(model): refactor copier for more flatness by @imsodin in #10094
• build: upgrade setup-zig action by @calmh in #10134
• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145
• chore: various linter fixes by @calmh in #10157
• build: streamline gathering of facts, checkouts by @calmh in #10158
• build: build both Debian armel and armhf (though they are the same for us) by @calmh in #10159
• build: explicitly trigger build after pushing release tag by @calmh in #10160
• chore(syncthing): ensure response body is closed in upgrade request by @ardevd in #10169
• refactor(syncthing): use named constant for SIGHUP by @ardevd in #10168
• chore(model): remove redundant removal of internal fields in indexsender by @imsodin in #10173
• chore: add migration for remote invalid local flag by @imsodin in #10174

New Contributors

• @ardevd made their first contribution in #10154

Full Changelog: v1.29.7...v2.0.0-rc.21

Syncthing 2 is coming

Syncthing version 1.x will soon be replaced by Syncthing version 2.x.
Version 2 brings a new database format and various cleanups, but remains
protocol compatible with Syncthing 1.

More detailed information about Syncthing 2 can be found in the release
notes at https://github.com/syncthing/syncthing/releases.

This release is also available as:

• APT repository: https://apt.syncthing.net/

• Docker image: docker.io/syncthing/syncthing:1.30.0-rc.1 or ghcr.io/syncthing/syncthing:1.30.0-rc.1
  ({docker,ghcr}.io/syncthing/syncthing:1 to follow just the major version)

What's Changed

Fixes

• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140
• fix(syncthing): avoid writing panic log to nil fd by @ardevd in #10154

Features

• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148

Other

• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145

New Contributors

• @ardevd made their first contribution in #10154

Full Changelog: v1.29.7...v1.30.0-rc.1

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.

• Deleted items are no longer kept forever in the database, instead they are
  forgotten after six months. If your use case require deletes to take
  effect after more than a six 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.

This release is also available as:

• APT repository: https://apt.syncthing.net/

• Docker image: docker.io/syncthing/syncthing:2.0.0-rc.20 or ghcr.io/syncthing/syncthing:2.0.0-rc.20
  ({docker,ghcr}.io/syncthing/syncthing:2 to follow just the major version)

What's Changed

Fixes

• fix(db): handle large numbers of blocks in update by @calmh in #10025
• fix(syncthing): make directory flags global for all commands by @calmh in #10028
• fix(sqlite): apply options by @pixelspark in #10049
• fix(db): version vector serialisation :( by @calmh in #10050
• fix(model): loop-break regression while block copying in puller by @imsodin in #10069
• fix(model): close fd immediately in copier by @imsodin in #10079
• fix(model): use same folder first in copier by @imsodin in #10093
• fix(model): correct bufferpool handling; simplify by @calmh in #10113
• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140
• fix(syncthing): avoid writing panic log to nil fd by @ardevd in #10154

Features

• feat: add syncthing debug database-statistics command by @calmh in #10117
• feat(config): enable multiple connections by default by @calmh in #10151
• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148

Other

• chore: remove abandoned next-gen-gui experiment by @calmh in #10004
• chore: remove weak hashing which does not pull its weight by @calmh in #10005
• chore: switch database engine to sqlite (fixes #9954) by @calmh in #9965
• chore: harmonise command line flags by @calmh in #10007
• chore(db): increase journal limit to 64MiB by @bt90 in #10022
• chore: forget deleted files older than six months (fixes #6284) by @calmh in #10023
• chore(db): use shorter read transactions and periodic checkpoint for smaller WAL by @calmh in #10027
• chore: configurable delete retention interval by @calmh in #10030
• chore(db): fix debug logging by @bt90 in #10033
• chore(db): buffer pulled files for smaller WAL by @calmh in #10036
• chore(db): use one SQLite database per folder by @calmh in #10042
• chore(model): delay starting a pull while there are incoming index updates by @calmh in #10041
• chore(syncthing): remove "default" folder concept by @calmh in #10068
• chore(syncthing): ensure migrated database is closed before exiting by @xjtdy888 in #10076
• chore(db, model): simplify per hash DB lookup in copier by @imsodin in #10080
• chore(model): refactor copier for more flatness by @imsodin in #10094
• build: upgrade setup-zig action by @calmh in #10134
• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145

New Contributors

• @ardevd made their first contribution in #10154

Full Changelog: v1.29.7...v2.0.0-rc.20

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.

• Deleted items are no longer kept forever in the database, instead they are
  forgotten after six months. If your use case require deletes to take
  effect after more than a six 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.

What's Changed

Fixes

• fix(db): handle large numbers of blocks in update by @calmh in #10025
• fix(syncthing): make directory flags global for all commands by @calmh in #10028
• fix(sqlite): apply options by @pixelspark in #10049
• fix(db): version vector serialisation :( by @calmh in #10050
• fix(model): loop-break regression while block copying in puller by @imsodin in #10069
• fix(model): close fd immediately in copier by @imsodin in #10079
• fix(model): use same folder first in copier by @imsodin in #10093
• fix(model): correct bufferpool handling; simplify by @calmh in #10113
• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140

Features

• feat: add syncthing debug database-statistics command by @calmh in #10117
• feat(config): enable multiple connections by default by @calmh in #10151
• feat(config): expose folder and device info as metrics (fixes #9519) by @calmh in #10148

Other

• chore: remove abandoned next-gen-gui experiment by @calmh in #10004
• chore: remove weak hashing which does not pull its weight by @calmh in #10005
• chore: switch database engine to sqlite (fixes #9954) by @calmh in #9965
• chore: harmonise command line flags by @calmh in #10007
• chore(db): increase journal limit to 64MiB by @bt90 in #10022
• chore: forget deleted files older than six months (fixes #6284) by @calmh in #10023
• chore(db): use shorter read transactions and periodic checkpoint for smaller WAL by @calmh in #10027
• chore: configurable delete retention interval by @calmh in #10030
• chore(db): fix debug logging by @bt90 in #10033
• chore(db): buffer pulled files for smaller WAL by @calmh in #10036
• chore(db): use one SQLite database per folder by @calmh in #10042
• chore(model): delay starting a pull while there are incoming index updates by @calmh in #10041
• chore(syncthing): remove "default" folder concept by @calmh in #10068
• chore(syncthing): ensure migrated database is closed before exiting by @xjtdy888 in #10076
• chore(db, model): simplify per hash DB lookup in copier by @imsodin in #10080
• chore(model): refactor copier for more flatness by @imsodin in #10094
• build: upgrade setup-zig action by @calmh in #10134
• build: properly propagate build tags to Debian build by @calmh in #10144
• chore(protocol): don't start connection routines a second time by @imsodin in #10146
• chore(protocol): only allow enc. password changes on cluster config by @imsodin in #10145

Full Changelog: v1.29.7...v2.0.0-rc.19

Syncthing 2 is coming

Syncthing version 1.x will soon be replaced by Syncthing version 2.x.
Version 2 brings a new database format and various cleanups, but remains
protocol compatible with Syncthing 1.

More detailed information about Syncthing 2 can be found in the release
notes at https://github.com/syncthing/syncthing/releases.

This release is also available as:

• APT repository: https://apt.syncthing.net/
• Docker image: docker.io/syncthing/syncthing:1.29.7 or ghcr.io/syncthing/syncthing:1.29.7
  ({docker,ghcr}.io/syncthing/syncthing:1 to follow just the major version)

What's Changed

Fixes

• fix(config): deep copy configuration defaults (fixes #9916) by @hazemKrimi in #10101
• fix(config): mark audit log options as needing restart (fixes #10099) by @marbens-arch in #10100
• fix(versioner): fix perms of created folders (fixes #9626) by @ashishbhate in #10105
• fix(syncthing): ensure both config and data dirs exist at startup (fixes #10126) by @calmh in #10127
• fix(gui): update uncamel() to handle strings like 'IDs' (fixes #10128) by @luckman212 in #10131

Features

• feat(gui): close a modal when pressing ESC after switching modal tabs (fixes #9489) by @hazemKrimi in #10092

Other

• chore(gui): add Serbian (sr) translation template by @acolomb in #10116
• build: reactivate golangci-lint by @calmh in #10118
• chore: move golangci-lint & meta to separate PR-only workflow by @calmh in #10119
• refactor: use slices.Contains to simplify code by @pullmerge in #10121
• build: process for automatic release tags by @calmh in #10133
• refactor: use slices package for sort by @mrclmr in #10132
• refactor: use slices package for sorting by @mrclmr in #10136
• docs: general notes about v2 coming by @calmh in #10135
• build: add labeler workflow for PRs by @calmh in #10143

New Contributors

• @hazemKrimi made their first contribution in #10092
• @pullmerge made their first contribution in #10121
• @ashishbhate made their first contribution in #10105
• @mrclmr made their first contribution in #10132

Full Changelog: v1.29.6...v1.29.7

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.

• Deleted items are no longer kept forever in the database, instead they are
  forgotten after six months. If your use case require deletes to take
  effect after more than a six 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.

What's Changed

Fixes

• fix(db): handle large numbers of blocks in update by @calmh in #10025
• fix(syncthing): make directory flags global for all commands by @calmh in #10028
• fix(sqlite): apply options by @pixelspark in #10049
• fix(db): version vector serialisation :( by @calmh in #10050
• fix(model): loop-break regression while block copying in puller by @imsodin in #10069
• fix(model): close fd immediately in copier by @imsodin in #10079
• fix(model): use same folder first in copier by @imsodin in #10093
• fix(config): deep copy configuration defaults (fixes #9916) by @hazemKrimi in #10101
• fix(config): mark audit log options as needing restart (fixes #10099) by @marbens-arch in #10100
• fix(model): correct bufferpool handling; simplify by @calmh in #10113
• fix(versioner): fix perms of created folders (fixes #9626) by @ashishbhate in #10105
• fix(syncthing): ensure both config and data dirs exist at startup (fixes #10126) by @calmh in #10127
• fix(gui): update uncamel() to handle strings like 'IDs' (fixes #10128) by @luckman212 in #10131
• fix(protocol): avoid deadlock with concurrent connection start and close by @calmh in #10140

Features

• feat(gui): close a modal when pressing ESC after switching modal tabs (fixes #9489) by @hazemKrimi in #10092
• feat: add syncthing debug database-statistics command by @calmh in #10117

Other

• chore: remove abandoned next-gen-gui experiment by @calmh in #10004
• chore: remove weak hashing which does not pull its weight by @calmh in #10005
• chore: switch database engine to sqlite (fixes #9954) by @calmh in #9965
• chore: harmonise command line flags by @calmh in #10007
• chore(db): increase journal limit to 64MiB by @bt90 in #10022
• chore: forget deleted files older than six months (fixes #6284) by @calmh in #10023
• chore(db): use shorter read transactions and periodic checkpoint for smaller WAL by @calmh in #10027
• chore: configurable delete retention interval by @calmh in #10030
• chore(db): fix debug logging by @bt90 in #10033
• chore(db): buffer pulled files for smaller WAL by @calmh in #10036
• chore(db): use one SQLite database per folder by @calmh in #10042
• chore(model): delay starting a pull while there are incoming index updates by @calmh in #10041
• chore(syncthing): remove "default" folder concept by @calmh in #10068
• chore(syncthing): ensure migrated database is closed before exiting by @xjtdy888 in #10076
• chore(db, model): simplify per hash DB lookup in copier by @imsodin in #10080
• chore(model): refactor copier for more flatness by @imsodin in #10094
• chore(gui): add Serbian (sr) translation template by @acolomb in #10116
• build: reactivate golangci-lint by @calmh in #10118
• chore: move golangci-lint & meta to separate PR-only workflow by @calmh in #10119
• refactor: use slices.Contains to simplify code by @pullmerge in #10121
• build: process for automatic release tags by @calmh in #10133
• refactor: use slices package for sort by @mrclmr in #10132
• build: upgrade setup-zig action by @calmh in #10134
• refactor: use slices package for sorting by @mrclmr in #10136
• docs: general notes about v2 coming by @calmh in #10135
• build: add labeler workflow for PRs by @calmh in #10143
• build: properly propagate build tags to Debian build by @calmh in #10144

New Contributors

• @hazemKrimi made their first contribution in #10092
• @pullmerge made their first contribution in #10121
• @ashishbhate made their first contribution in #10105
• @mrclmr made their first contribution in #10132

Full Changelog: v1.29.6...v2.0.0-rc.18