Documentation
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Overview ¶
Package restorer contains code to restore data from a repository.
The Restorer tries to keep the number of backend requests minimal. It does this by downloading all required blobs of a pack file with a single backend request and avoiding repeated downloads of the same pack. In addition, several pack files are fetched concurrently.
Here is high-level pseudo-code of how the Restorer attempts to achieve these goals:
while there are packs to process choose a pack to process [1] retrieve the pack from the backend [2] write pack blobs to the files that need them [3]
Retrieval of repository packs (step [2]) and writing target files (step [3]) are performed concurrently on multiple goroutines.
Implementation does not guarantee order in which blobs are written to the target files and, for example, the last blob of a file can be written to the file before any of the preceding file blobs. It is therefore possible to have gaps in the data written to the target files if restore fails or interrupted by the user.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type HardlinkIndex ¶
type HardlinkIndex struct {
Index map[HardlinkKey]string
// contains filtered or unexported fields
}
HardlinkIndex contains a list of inodes, devices these inodes are one, and associated file names.
func NewHardlinkIndex ¶
func NewHardlinkIndex() *HardlinkIndex
NewHardlinkIndex create a new index for hard links
func (*HardlinkIndex) Add ¶
func (idx *HardlinkIndex) Add(inode uint64, device uint64, name string)
Add adds a link to the index.
func (*HardlinkIndex) GetFilename ¶
func (idx *HardlinkIndex) GetFilename(inode uint64, device uint64) string
GetFilename obtains the filename from the index.
func (*HardlinkIndex) Has ¶
func (idx *HardlinkIndex) Has(inode uint64, device uint64) bool
Has checks wether the link already exist in the index.
func (*HardlinkIndex) Remove ¶
func (idx *HardlinkIndex) Remove(inode uint64, device uint64)
Remove removes a link from the index.
type HardlinkKey ¶
type HardlinkKey struct {
Inode, Device uint64
}
HardlinkKey is a composed key for finding inodes on a specific device.
type Restorer ¶
type Restorer struct {
Error func(location string, err error) error
SelectFilter func(item string, dstpath string, node *restic.Node) (selectedForRestore bool, childMayBeSelected bool)
// contains filtered or unexported fields
}
Restorer is used to restore a snapshot to a directory.
func NewRestorer ¶
func NewRestorer(repo restic.Repository, sn *restic.Snapshot, sparse bool, progress *restoreui.Progress) *Restorer
NewRestorer creates a restorer preloaded with the content from the snapshot id.
func (*Restorer) RestoreTo ¶
RestoreTo creates the directories and files in the snapshot below dst. Before an item is created, res.Filter is called.
func (*Restorer) VerifyFiles ¶
VerifyFiles checks whether all regular files in the snapshot res.sn have been successfully written to dst. It stops when it encounters an error. It returns that error and the number of files it has successfully verified.
Source Files