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bisync: generate listings concurrently with march -- fixes #7332

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Before this change, bisync needed to build a full listing for Path1, then a
full listing for Path2, then compare them -- and each of those tasks needed to
finish before the next one could start. In addition to being slow and
inefficient, it also caused real problems if a file changed between the time
bisync checked it on Path1 and the time it checked the corresponding file on
Path2.

This change solves these problems by listing both paths concurrently, using
the same March infrastructure that check and sync use to traverse two
directories in lock-step, optimized by Go's robust concurrency support.
Listings should now be much faster, and any given path is now checked
nearly-instantaneously on both sides, minimizing room for error.

Further discussion:
https://forum.rclone.org/t/bisync-bugs-and-feature-requests/37636#:~:text=4.%20Listings%20should%20alternate%20between%20paths%20to%20minimize%20errors
This commit is contained in:
nielash 2023-10-07 06:33:43 -04:00
parent 0cac5d67ab
commit fd95511091
27 changed files with 319 additions and 108 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
cmd/bisync/bilib/files.go
View File

@ -39,7 +39,7 @@ func FileExists(file string) bool {
return !os.IsNotExist(err)
}
// CopyFileIfExists is like CopyFile but does to fail if source does not exist
// CopyFileIfExists is like CopyFile but does not fail if source does not exist
func CopyFileIfExists(srcFile, dstFile string) error {
if !FileExists(srcFile) {
return nil

12
cmd/bisync/deltas.go
View File

@ -137,8 +137,9 @@ func (b *bisyncRun) checkconflicts(ctxCheck context.Context, filterCheck *filter
}
// findDeltas
func (b *bisyncRun) findDeltas(fctx context.Context, f fs.Fs, oldListing, newListing, msg string) (ds *deltaSet, err error) {
var old, now *fileList
func (b *bisyncRun) findDeltas(fctx context.Context, f fs.Fs, oldListing string, now *fileList, msg string) (ds *deltaSet, err error) {
var old *fileList
newListing := oldListing + "-new"
old, err = b.loadListing(oldListing)
if err != nil {
@ -150,7 +151,6 @@ func (b *bisyncRun) findDeltas(fctx context.Context, f fs.Fs, oldListing, newLis
return
}
now, err = b.makeListing(fctx, f, newListing)
if err == nil {
err = b.checkListing(now, newListing, "current "+msg)
}
@ -235,6 +235,8 @@ func (b *bisyncRun) applyDeltas(ctx context.Context, ds1, ds2 *deltaSet) (change
renamed2 := bilib.Names{}
renameSkipped := bilib.Names{}
deletedonboth := bilib.Names{}
skippedDirs1 := newFileList()
skippedDirs2 := newFileList()
ctxMove := b.opt.setDryRun(ctx)
@ -304,6 +306,8 @@ func (b *bisyncRun) applyDeltas(ctx context.Context, ds1, ds2 *deltaSet) (change
//if files are identical, leave them alone instead of renaming
if dirs1.has(file) && dirs2.has(file) {
fs.Debugf(nil, "This is a directory, not a file. Skipping equality check and will not rename: %s", file)
ls1.getPut(file, skippedDirs1)
ls2.getPut(file, skippedDirs2)
} else {
equal := matches.Has(file)
if equal {
@ -424,6 +428,8 @@ func (b *bisyncRun) applyDeltas(ctx context.Context, ds1, ds2 *deltaSet) (change
queues.renamed2 = renamed2
queues.renameSkipped = renameSkipped
queues.deletedonboth = deletedonboth
queues.skippedDirs1 = skippedDirs1
queues.skippedDirs2 = skippedDirs2
return
}

120
cmd/bisync/listing.go
View File

@ -12,7 +12,6 @@ import (
"sort"
"strconv"
"strings"
"sync"
"time"
"github.com/rclone/rclone/cmd/bisync/bilib"
@ -20,7 +19,6 @@ import (
"github.com/rclone/rclone/fs/filter"
"github.com/rclone/rclone/fs/hash"
"github.com/rclone/rclone/fs/operations"
"github.com/rclone/rclone/fs/walk"
"golang.org/x/exp/slices"
)
@ -70,6 +68,9 @@ func newFileList() *fileList {
}
func (ls *fileList) empty() bool {
if ls == nil {
return true
}
return len(ls.list) == 0
}
@ -99,6 +100,12 @@ func (ls *fileList) getPut(file string, dest *fileList) {
dest.put(file, f.size, f.time, f.hash, f.id, f.flags)
}
func (ls *fileList) getPutAll(dest *fileList) {
for file, f := range ls.info {
dest.put(file, f.size, f.time, f.hash, f.id, f.flags)
}
}
func (ls *fileList) remove(file string) {
if ls.has(file) {
ls.list = slices.Delete(ls.list, slices.Index(ls.list, file), slices.Index(ls.list, file)+1)
@ -292,13 +299,16 @@ func (b *bisyncRun) loadListing(listing string) (*fileList, error) {
return ls, nil
}
// saveOldListings saves the most recent successful listing, in case we need to rollback on error
func (b *bisyncRun) saveOldListings() {
if err := bilib.CopyFileIfExists(b.listing1, b.listing1+"-old"); err != nil {
fs.Debugf(b.listing1, "error saving old listing1: %v", err)
}
if err := bilib.CopyFileIfExists(b.listing2, b.listing2+"-old"); err != nil {
fs.Debugf(b.listing1, "error saving old listing2: %v", err)
}
b.handleErr(b.listing1, "error saving old Path1 listing", bilib.CopyFileIfExists(b.listing1, b.listing1+"-old"), true, true)
b.handleErr(b.listing2, "error saving old Path2 listing", bilib.CopyFileIfExists(b.listing2, b.listing2+"-old"), true, true)
}
// replaceCurrentListings saves both ".lst-new" listings as ".lst"
func (b *bisyncRun) replaceCurrentListings() {
b.handleErr(b.newListing1, "error replacing Path1 listing", bilib.CopyFileIfExists(b.newListing1, b.listing1), true, true)
b.handleErr(b.newListing2, "error replacing Path2 listing", bilib.CopyFileIfExists(b.newListing2, b.listing2), true, true)
}
func parseHash(str string) (string, string, error) {
@ -314,71 +324,6 @@ func parseHash(str string) (string, string, error) {
return "", "", fmt.Errorf("invalid hash %q", str)
}
// makeListing will produce listing from directory tree and write it to a file
func (b *bisyncRun) makeListing(ctx context.Context, f fs.Fs, listing string) (ls *fileList, err error) {
ci := fs.GetConfig(ctx)
depth := ci.MaxDepth
hashType := hash.None
if !b.opt.IgnoreListingChecksum {
// Currently bisync just honors --ignore-listing-checksum
// (note that this is different from --ignore-checksum)
// TODO add full support for checksums and related flags
hashType = f.Hashes().GetOne()
}
ls = newFileList()
ls.hash = hashType
var lock sync.Mutex
listType := walk.ListObjects
if b.opt.CreateEmptySrcDirs {
listType = walk.ListAll
}
err = walk.ListR(ctx, f, "", false, depth, listType, func(entries fs.DirEntries) error {
var firstErr error
entries.ForObject(func(o fs.Object) {
//tr := accounting.Stats(ctx).NewCheckingTransfer(o) // TODO
var (
hashVal string
hashErr error
)
if hashType != hash.None {
hashVal, hashErr = o.Hash(ctx, hashType)
if firstErr == nil {
firstErr = hashErr
}
}
time := o.ModTime(ctx).In(TZ)
id := "" // TODO
flags := "-" // "-" for a file and "d" for a directory
lock.Lock()
ls.put(o.Remote(), o.Size(), time, hashVal, id, flags)
lock.Unlock()
//tr.Done(ctx, nil) // TODO
})
if b.opt.CreateEmptySrcDirs {
entries.ForDir(func(o fs.Directory) {
var (
hashVal string
)
time := o.ModTime(ctx).In(TZ)
id := "" // TODO
flags := "d" // "-" for a file and "d" for a directory
lock.Lock()
//record size as 0 instead of -1, so bisync doesn't think it's a google doc
ls.put(o.Remote(), 0, time, hashVal, id, flags)
lock.Unlock()
})
}
return firstErr
})
if err == nil {
err = ls.save(ctx, listing)
}
if err != nil {
b.abort = true
}
return
}
// checkListing verifies that listing is not empty (unless resynching)
func (b *bisyncRun) checkListing(ls *fileList, listing, msg string) error {
if b.opt.Resync || !ls.empty() {
@ -542,8 +487,6 @@ func (b *bisyncRun) modifyListing(ctx context.Context, src fs.Fs, dst fs.Fs, res
updateLists("src", srcWinners, srcList)
updateLists("dst", dstWinners, dstList)
// TODO: rollback on error
// account for "deltaOthers" we handled separately
if queues.deletedonboth.NotEmpty() {
for file := range queues.deletedonboth {
@ -587,7 +530,7 @@ func (b *bisyncRun) modifyListing(ctx context.Context, src fs.Fs, dst fs.Fs, res
// recheck the ones we skipped because they were equal
// we never got their info because they were never synced.
// TODO: add flag to skip this for people who don't care and would rather avoid?
// TODO: add flag to skip this? (since it re-lists)
if queues.renameSkipped.NotEmpty() {
skippedList := queues.renameSkipped.ToList()
for _, file := range skippedList {
@ -596,6 +539,20 @@ func (b *bisyncRun) modifyListing(ctx context.Context, src fs.Fs, dst fs.Fs, res
}
}
}
// skipped dirs -- nothing to recheck, just add them
// (they are not necessarily there already, if they are new)
path1List := srcList
path2List := dstList
if !is1to2 {
path1List = dstList
path2List = srcList
}
if !queues.skippedDirs1.empty() {
queues.skippedDirs1.getPutAll(path1List)
}
if !queues.skippedDirs2.empty() {
queues.skippedDirs2.getPutAll(path2List)
}
if filterRecheck.HaveFilesFrom() {
b.recheck(ctxRecheck, src, dst, srcList, dstList, is1to2)
@ -665,9 +622,9 @@ func (b *bisyncRun) recheck(ctxRecheck context.Context, src, dst fs.Fs, srcList,
if len(toRollback) > 0 {
srcListing, dstListing := b.getListingNames(is1to2)
oldSrc, err := b.loadListing(srcListing + "-old")
handleErr(oldSrc, "error loading old src listing", err) // TODO: make this critical?
b.handleErr(oldSrc, "error loading old src listing", err, true, true)
oldDst, err := b.loadListing(dstListing + "-old")
handleErr(oldDst, "error loading old dst listing", err) // TODO: make this critical?
b.handleErr(oldDst, "error loading old dst listing", err, true, true)
for _, item := range toRollback {
rollback(item, oldSrc, srcList)
@ -683,13 +640,6 @@ func (b *bisyncRun) getListingNames(is1to2 bool) (srcListing string, dstListing
return b.listing2, b.listing1
}
func handleErr(o interface{}, msg string, err error) {
// TODO: add option to make critical?
if err != nil {
fs.Debugf(o, "%s: %v", msg, err)
}
}
func rollback(item string, oldList, newList *fileList) {
if oldList.has(item) {
oldList.getPut(item, newList)

189
cmd/bisync/march.go Normal file
View File

@ -0,0 +1,189 @@
package bisync
import (
"context"
"sync"
"github.com/rclone/rclone/fs"
"github.com/rclone/rclone/fs/accounting"
"github.com/rclone/rclone/fs/hash"
"github.com/rclone/rclone/fs/march"
)
var ls1 = newFileList()
var ls2 = newFileList()
var err error
var firstErr error
var marchLsLock sync.Mutex
var marchErrLock sync.Mutex
var marchCtx context.Context
func (b *bisyncRun) makeMarchListing(ctx context.Context) (*fileList, *fileList, error) {
ci := fs.GetConfig(ctx)
marchCtx = ctx
b.setupListing()
fs.Debugf(b, "starting to march!")
// set up a march over fdst (Path2) and fsrc (Path1)
m := &march.March{
Ctx: ctx,
Fdst: b.fs2,
Fsrc: b.fs1,
Dir: "",
NoTraverse: false,
Callback: b,
DstIncludeAll: false,
NoCheckDest: false,
NoUnicodeNormalization: ci.NoUnicodeNormalization,
}
err = m.Run(ctx)
fs.Debugf(b, "march completed. err: %v", err)
if err == nil {
err = firstErr
}
if err != nil {
b.abort = true
}
// save files
err = ls1.save(ctx, b.newListing1)
if err != nil {
b.abort = true
}
err = ls2.save(ctx, b.newListing2)
if err != nil {
b.abort = true
}
return ls1, ls2, err
}
// SrcOnly have an object which is on path1 only
func (b *bisyncRun) SrcOnly(o fs.DirEntry) (recurse bool) {
fs.Debugf(o, "path1 only")
b.parse(o, true)
return isDir(o)
}
// DstOnly have an object which is on path2 only
func (b *bisyncRun) DstOnly(o fs.DirEntry) (recurse bool) {
fs.Debugf(o, "path2 only")
b.parse(o, false)
return isDir(o)
}
// Match is called when object exists on both path1 and path2 (whether equal or not)
func (b *bisyncRun) Match(ctx context.Context, o2, o1 fs.DirEntry) (recurse bool) {
fs.Debugf(o1, "both path1 and path2")
b.parse(o1, true)
b.parse(o2, false)
return isDir(o1)
}
func isDir(e fs.DirEntry) bool {
switch x := e.(type) {
case fs.Object:
fs.Debugf(x, "is Object")
return false
case fs.Directory:
fs.Debugf(x, "is Dir")
return true
default:
fs.Debugf(e, "is unknown")
}
return false
}
func (b *bisyncRun) parse(e fs.DirEntry, isPath1 bool) {
switch x := e.(type) {
case fs.Object:
b.ForObject(x, isPath1)
case fs.Directory:
if b.opt.CreateEmptySrcDirs {
b.ForDir(x, isPath1)
}
default:
fs.Debugf(e, "is unknown")
}
}
func (b *bisyncRun) setupListing() {
ls1 = newFileList()
ls2 = newFileList()
hashType1 := hash.None
hashType2 := hash.None
if !b.opt.IgnoreListingChecksum {
// Currently bisync just honors --ignore-listing-checksum
// (note that this is different from --ignore-checksum)
// TODO add full support for checksums and related flags
hashType1 = b.fs1.Hashes().GetOne()
hashType2 = b.fs2.Hashes().GetOne()
}
ls1.hash = hashType1
ls2.hash = hashType2
}
func (b *bisyncRun) ForObject(o fs.Object, isPath1 bool) {
tr := accounting.Stats(marchCtx).NewCheckingTransfer(o, "listing file - "+whichPath(isPath1))
defer func() {
tr.Done(marchCtx, nil)
}()
var (
hashVal string
hashErr error
)
ls := whichLs(isPath1)
hashType := ls.hash
if hashType != hash.None {
hashVal, hashErr = o.Hash(marchCtx, hashType)
marchErrLock.Lock()
if firstErr == nil {
firstErr = hashErr
}
marchErrLock.Unlock()
}
time := o.ModTime(marchCtx).In(TZ)
id := "" // TODO
flags := "-" // "-" for a file and "d" for a directory
marchLsLock.Lock()
ls.put(o.Remote(), o.Size(), time, hashVal, id, flags)
marchLsLock.Unlock()
}
func (b *bisyncRun) ForDir(o fs.Directory, isPath1 bool) {
tr := accounting.Stats(marchCtx).NewCheckingTransfer(o, "listing dir - "+whichPath(isPath1))
defer func() {
tr.Done(marchCtx, nil)
}()
ls := whichLs(isPath1)
time := o.ModTime(marchCtx).In(TZ)
id := "" // TODO
flags := "d" // "-" for a file and "d" for a directory
marchLsLock.Lock()
//record size as 0 instead of -1, so bisync doesn't think it's a google doc
ls.put(o.Remote(), 0, time, "", id, flags)
marchLsLock.Unlock()
}
func whichLs(isPath1 bool) *fileList {
ls := ls1
if !isPath1 {
ls = ls2
}
return ls
}
func whichPath(isPath1 bool) string {
s := "Path1"
if !isPath1 {
s = "Path2"
}
return s
}
// TODO:
// equality check?
// unicode stuff

50
cmd/bisync/operations.go
View File

@ -45,6 +45,8 @@ type queues struct {
renamed1 bilib.Names // renamed on 1 and copied to 2
renamed2 bilib.Names // renamed on 2 and copied to 1
renameSkipped bilib.Names // not renamed because it was equal
skippedDirs1 *fileList
skippedDirs2 *fileList
deletedonboth bilib.Names
}
@ -217,10 +219,15 @@ func (b *bisyncRun) runLocked(octx context.Context) (err error) {
return errors.New("cannot find prior Path1 or Path2 listings, likely due to critical error on prior run")
}
fs.Infof(nil, "Building Path1 and Path2 listings")
ls1, ls2, err = b.makeMarchListing(fctx)
if err != nil {
return err
}
// Check for Path1 deltas relative to the prior sync
fs.Infof(nil, "Path1 checking for diffs")
newListing1 := b.listing1 + "-new"
ds1, err := b.findDeltas(fctx, b.fs1, b.listing1, newListing1, "Path1")
ds1, err := b.findDeltas(fctx, b.fs1, b.listing1, ls1, "Path1")
if err != nil {
return err
}
@ -228,8 +235,7 @@ func (b *bisyncRun) runLocked(octx context.Context) (err error) {
// Check for Path2 deltas relative to the prior sync
fs.Infof(nil, "Path2 checking for diffs")
newListing2 := b.listing2 + "-new"
ds2, err := b.findDeltas(fctx, b.fs2, b.listing2, newListing2, "Path2")
ds2, err := b.findDeltas(fctx, b.fs2, b.listing2, ls2, "Path2")
if err != nil {
return err
}
@ -298,8 +304,7 @@ func (b *bisyncRun) runLocked(octx context.Context) (err error) {
b.saveOldListings()
// save new listings
if noChanges {
err1 = bilib.CopyFileIfExists(newListing1, b.listing1)
err2 = bilib.CopyFileIfExists(newListing2, b.listing2)
b.replaceCurrentListings()
} else {
if changes1 { // 2to1
err1 = b.modifyListing(fctx, b.fs2, b.fs1, results2to1, queues, false)
@ -360,7 +365,10 @@ func (b *bisyncRun) runLocked(octx context.Context) (err error) {
func (b *bisyncRun) resync(octx, fctx context.Context) error {
fs.Infof(nil, "Copying unique Path2 files to Path1")
filesNow1, err := b.makeListing(fctx, b.fs1, b.newListing1)
// TODO: remove this listing eventually.
// Listing here is only really necessary for our --ignore-existing logic
// which would be more efficiently implemented by setting ci.IgnoreExisting
filesNow1, filesNow2, err := b.makeMarchListing(fctx)
if err == nil {
err = b.checkListing(filesNow1, b.newListing1, "current Path1")
}
@ -368,10 +376,7 @@ func (b *bisyncRun) resync(octx, fctx context.Context) error {
return err
}
filesNow2, err := b.makeListing(fctx, b.fs2, b.newListing2)
if err == nil {
err = b.checkListing(filesNow2, b.newListing2, "current Path2")
}
err = b.checkListing(filesNow2, b.newListing2, "current Path2")
if err != nil {
return err
}
@ -468,13 +473,8 @@ func (b *bisyncRun) resync(octx, fctx context.Context) error {
}
fs.Infof(nil, "Resync updating listings")
b.saveOldListings() // TODO: also make replaceCurrentListings?
if err := bilib.CopyFileIfExists(b.newListing1, b.listing1); err != nil {
return err
}
if err := bilib.CopyFileIfExists(b.newListing2, b.listing2); err != nil {
return err
}
b.saveOldListings()
b.replaceCurrentListings()
// resync 2to1
queues.copy2to1 = bilib.ToNames(copy2to1)
@ -574,3 +574,17 @@ func (b *bisyncRun) testFn() {
b.opt.TestFn()
}
}
func (b *bisyncRun) handleErr(o interface{}, msg string, err error, critical, retryable bool) {
if err != nil {
if retryable {
b.retryable = true
}
if critical {
b.critical = true
fs.Errorf(o, "%s: %v", msg, err)
} else {
fs.Debugf(o, "%s: %v", msg, err)
}
}
}

3
cmd/bisync/testdata/test_all_changed/golden/test.log vendored
View File

@ -16,6 +16,7 @@ INFO : Bisync successful
(07) : test sync should pass
(08) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - file1.copy1.txt
INFO : - Path1 File is newer - file1.copy2.txt
@ -46,6 +47,7 @@ INFO : Bisync successful
(12) : test sync should fail
(13) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - RCLONE_TEST
INFO : - Path1 File is OLDER - file1.copy1.txt
@ -64,6 +66,7 @@ Bisync error: all files were changed
(14) : test sync with force should pass
(15) : bisync force
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - RCLONE_TEST
INFO : - Path1 File is OLDER - file1.copy1.txt

1
cmd/bisync/testdata/test_basic/golden/test.log vendored
View File

@ -17,6 +17,7 @@ INFO : Bisync successful
(07) : test bisync run
(08) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - subdir/file20.txt
INFO : Path1: 1 changes: 0 new, 1 newer, 0 older, 0 deleted

1
cmd/bisync/testdata/test_changes/golden/test.log vendored
View File

@ -49,6 +49,7 @@ INFO : Bisync successful
(31) : test bisync run
(32) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - file2.txt
INFO : - Path1 File was deleted - file4.txt

5
cmd/bisync/testdata/test_check_access/golden/test.log vendored
View File

@ -12,6 +12,7 @@ INFO : Bisync successful
(04) : test 1. see that check-access passes with the initial setup
(05) : bisync check-access
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -25,6 +26,7 @@ INFO : Bisync successful
(07) : delete-file {path2/}subdir/RCLONE_TEST
(08) : bisync check-access
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : - Path2 File was deleted - subdir/RCLONE_TEST
@ -49,6 +51,7 @@ INFO : Bisync successful
(13) : test 4. run sync with check-access. should pass.
(14) : bisync check-access
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -62,6 +65,7 @@ INFO : Bisync successful
(16) : delete-file {path1/}RCLONE_TEST
(17) : bisync check-access
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - RCLONE_TEST
INFO : Path1: 1 changes: 0 new, 0 newer, 0 older, 1 deleted
@ -95,6 +99,7 @@ INFO : Bisync successful
(24) : test 8. run sync with --check-access. should pass.
(25) : bisync check-access
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health

8
cmd/bisync/testdata/test_check_access_filters/golden/test.log vendored
View File

@ -18,6 +18,7 @@ INFO : Bisync successful
(07) : bisync check-access filters-file={workdir/}exclude-other-filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}exclude-other-filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -38,6 +39,7 @@ INFO : Bisync successful
(15) : bisync check-access filters-file={workdir/}exclude-other-filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}exclude-other-filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -56,6 +58,7 @@ INFO : Bisync successful
(21) : bisync check-access filters-file={workdir/}exclude-other-filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}exclude-other-filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - subdir/RCLONE_TEST
INFO : Path1: 1 changes: 0 new, 0 newer, 0 older, 1 deleted
@ -88,6 +91,7 @@ INFO : Bisync successful
(30) : bisync check-access filters-file={workdir/}include-other-filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}include-other-filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -107,6 +111,7 @@ INFO : Bisync successful
(37) : bisync check-access filters-file={workdir/}include-other-filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}include-other-filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -126,6 +131,7 @@ INFO : Bisync successful
(44) : bisync check-access filters-file={workdir/}include-other-filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}include-other-filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - subdir/RCLONE_TEST
INFO : - Path1 File was deleted - subdirX/subdirX1/RCLONE_TEST
@ -136,8 +142,8 @@ INFO : Path2: 1 changes: 0 new, 0 newer, 0 older, 1 deleted
INFO : Checking access health
ERROR : Access test failed: Path1 count 3, Path2 count 4 - RCLONE_TEST
ERROR : -  Access test failed: Path1 file not found in Path2 - RCLONE_TEST
ERROR : -  Access test failed: Path2 file not found in Path1 - subdirX/subdirX1/RCLONE_TEST
ERROR : -  Access test failed: Path2 file not found in Path1 - subdir/RCLONE_TEST
ERROR : -  Access test failed: Path2 file not found in Path1 - subdirX/subdirX1/RCLONE_TEST
ERROR : Bisync critical error: check file check failed
ERROR : Bisync aborted. Must run --resync to recover.
Bisync error: bisync aborted

3
cmd/bisync/testdata/test_check_filename/golden/test.log vendored
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@ -12,6 +12,7 @@ INFO : Bisync successful
(04) : test 1. see that check-access passes with the initial setup
(05) : bisync check-access check-filename=.chk_file
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -26,6 +27,7 @@ INFO : Bisync successful
(08) : delete-file {path2/}subdir/.chk_file
(09) : bisync check-access check-filename=.chk_file
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : - Path2 File was deleted - subdir/.chk_file
@ -52,6 +54,7 @@ INFO : Bisync successful
(14) : test 4. run sync with check-access. should pass.
(15) : bisync check-access check-filename=.chk_file
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health

2
cmd/bisync/testdata/test_check_sync/golden/test.log vendored
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@ -51,6 +51,7 @@ INFO : Bisync successful
(20) : test 7. run normal sync with check-sync enabled (default)
(21) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found
@ -61,6 +62,7 @@ INFO : Bisync successful
(22) : test 8. run normal sync with no-check-sync
(23) : bisync no-check-sync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found

5
cmd/bisync/testdata/test_createemptysrcdirs/golden/test.log vendored
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@ -24,6 +24,7 @@ INFO : Bisync successful
(15) : test 2. Run bisync without --create-empty-src-dirs
(16) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found
@ -39,6 +40,7 @@ subdir/
(20) : test 4.Run bisync WITH --create-empty-src-dirs
(21) : bisync create-empty-src-dirs
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is new - subdir
INFO : Path1: 1 changes: 1 new, 0 newer, 0 older, 0 deleted
@ -68,6 +70,7 @@ subdir/
(33) : test 7. Run bisync without --create-empty-src-dirs
(34) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - RCLONE_TEST
INFO : - Path1 File was deleted - subdir
@ -115,6 +118,7 @@ subdir/
(51) : bisync create-empty-src-dirs
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - subdir
INFO : Path1: 1 changes: 0 new, 0 newer, 0 older, 1 deleted
@ -134,6 +138,7 @@ INFO : Bisync successful
(55) : test 11. bisync again (because if we leave subdir in listings, test will fail due to mismatched modtime)
(56) : bisync create-empty-src-dirs
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found

2
cmd/bisync/testdata/test_dry_run/golden/test.log vendored
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@ -66,6 +66,7 @@ INFO : Bisync successful
(30) : test sync with dry-run
(31) : bisync dry-run
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - file2.txt
INFO : - Path1 File was deleted - file4.txt
@ -120,6 +121,7 @@ INFO : Bisync successful
(33) : test sync without dry-run
(34) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - file2.txt
INFO : - Path1 File was deleted - file4.txt

1
cmd/bisync/testdata/test_equal/golden/test.log vendored
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@ -23,6 +23,7 @@ INFO : Bisync successful
(13) : test bisync run
(14) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - file1.txt
INFO : - Path1 File is newer - file2.txt

4
cmd/bisync/testdata/test_extended_char_paths/golden/test.log vendored
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@ -19,6 +19,7 @@ INFO : Bisync successful
(09) : test normal sync of subdirs with extended chars
(10) : bisync subdir=測試_Русский_{spc}_{spc}_ě_áñ
INFO : Synching Path1 "{path1/}測試_Русский_ _ _ě_áñ/" with Path2 "{path2/}測試_Русский_ _ _ě_áñ/"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is new - 測試_file1p1
INFO : Path1: 1 changes: 1 new, 0 newer, 0 older, 0 deleted
@ -45,6 +46,7 @@ INFO : Bisync successful
(14) : delete-file {path1/}測試_Русский_{spc}_{spc}_ě_áñ/測試_check{spc}file
(15) : bisync check-access check-filename=測試_check{spc}file
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - 測試_Русский_ _ _ě_áñ/測試_check file
INFO : Path1: 1 changes: 0 new, 0 newer, 0 older, 1 deleted
@ -68,6 +70,7 @@ INFO : Resync updating listings
INFO : Bisync successful
(19) : bisync check-access check-filename=測試_check{spc}file
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : Checking access health
@ -92,6 +95,7 @@ INFO : Bisync successful
(25) : bisync filters-file={workdir/}測試_filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}測試_filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found

1
cmd/bisync/testdata/test_extended_filenames/golden/test.log vendored
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@ -38,6 +38,7 @@ INFO : Bisync successful
(26) : test bisync run
(27) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - Русский.txt
INFO : - Path1 File is new - file1_with white space.txt

1
cmd/bisync/testdata/test_filters/golden/test.log vendored
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@ -24,6 +24,7 @@ INFO : Bisync successful
(11) : bisync filters-file={workdir/}filtersfile.flt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}filtersfile.flt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is new - subdir/fileZ.txt
INFO : Path1: 1 changes: 1 new, 0 newer, 0 older, 0 deleted

1
cmd/bisync/testdata/test_filtersfile_checks/golden/test.log vendored
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@ -41,6 +41,7 @@ INFO : Bisync successful
(13) : bisync filters-file={workdir/}filtersfile.txt
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Using filters file {workdir/}filtersfile.txt
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found

1
cmd/bisync/testdata/test_ignorelistingchecksum/golden/test.log vendored
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@ -23,6 +23,7 @@ INFO : Bisync successful
(08) : test bisync run
(09) : bisync ignore-listing-checksum
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - subdir/file20.txt
INFO : Path1: 1 changes: 0 new, 1 newer, 0 older, 0 deleted

2
cmd/bisync/testdata/test_max_delete_path1/golden/test.log vendored
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@ -19,6 +19,7 @@ INFO : Bisync successful
(10) : test sync should fail due to too many local deletes
(11) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - file1.txt
INFO : - Path1 File was deleted - file2.txt
@ -35,6 +36,7 @@ Bisync error: too many deletes
(13) : test change max-delete limit to 60%. sync should run.
(14) : bisync max-delete=60
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - file1.txt
INFO : - Path1 File was deleted - file2.txt

2
cmd/bisync/testdata/test_max_delete_path2_force/golden/test.log vendored
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@ -19,6 +19,7 @@ INFO : Bisync successful
(10) : test sync should fail due to too many path2 deletes
(11) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : - Path2 File was deleted - file1.txt
@ -35,6 +36,7 @@ Bisync error: too many deletes
(13) : test apply force option. sync should run.
(14) : bisync force
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : - Path2 File was deleted - file1.txt

1
cmd/bisync/testdata/test_rclone_args/golden/test.log vendored
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@ -23,6 +23,7 @@ INFO : Bisync successful
(10) : test run bisync with custom options
(11) : bisync size-only
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - file1.txt
INFO : - Path1 File is newer - subdir/file20.txt

2
cmd/bisync/testdata/test_resync/golden/test.log vendored
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@ -72,6 +72,7 @@ INFO : Bisync successful
(32) : test run normal bisync
(33) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found
@ -83,6 +84,7 @@ INFO : Bisync successful
(35) : purge-children {path2/}
(36) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
ERROR : Empty current Path2 listing. Cannot sync to an empty directory: {workdir/}{session}.path2.lst-new

2
cmd/bisync/testdata/test_rmdirs/golden/test.log vendored
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@ -15,6 +15,7 @@ INFO : Bisync successful
(06) : test 2. run bisync without remove-empty-dirs
(07) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File was deleted - subdir/file20.txt
INFO : Path1: 1 changes: 0 new, 0 newer, 0 older, 1 deleted
@ -35,6 +36,7 @@ subdir/
(11) : test 4. run bisync with remove-empty-dirs
(12) : bisync remove-empty-dirs
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : Path2 checking for diffs
INFO : No changes found

3
cmd/bisync/testdata/test_volatile/golden/test.log vendored
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@ -18,6 +18,7 @@ INFO : Bisync successful
(10) : test-func
(11) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is newer - file5.txt
INFO : Path1: 1 changes: 0 new, 1 newer, 0 older, 0 deleted
@ -51,6 +52,7 @@ INFO : Bisync successful
(18) : test-func
(19) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is new - file100.txt
INFO : - Path1 File is new - file5.txt
@ -268,6 +270,7 @@ INFO : Bisync successful
(26) : test-func
(27) : bisync
INFO : Synching Path1 "{path1/}" with Path2 "{path2/}"
INFO : Building Path1 and Path2 listings
INFO : Path1 checking for diffs
INFO : - Path1 File is new - file5.txt
INFO : Path1: 1 changes: 1 new, 0 newer, 0 older, 0 deleted

3
docs/content/bisync.md
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@ -1275,6 +1275,9 @@ about _Unison_ and synchronization in general.
* Final listings are now generated from sync results, to avoid needing to re-list
* Bisync is now much more resilient to changes that happen during a bisync run, and far less prone to critical errors / undetected changes
* Bisync is now capable of rolling a file listing back in cases of uncertainty, essentially marking the file as needing to be rechecked next time.
* A few basic terminal colors are now supported, controllable with [`--color`](/docs/#color-when) (`AUTO`|`NEVER`|`ALWAYS`)
* Initial listing snapshots of Path1 and Path2 are now generated concurrently, using the same "march" infrastructure as `check` and `sync`,
for performance improvements and less [risk of error](https://forum.rclone.org/t/bisync-bugs-and-feature-requests/37636#:~:text=4.%20Listings%20should%20alternate%20between%20paths%20to%20minimize%20errors).
### `v1.64`
* Fixed an [issue](https://forum.rclone.org/t/bisync-bugs-and-feature-requests/37636#:~:text=1.%20Dry%20runs%20are%20not%20completely%20dry)