mirror of
https://github.com/octoleo/restic.git
synced 2024-11-30 08:44:02 +00:00
103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
package repository
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/restic/chunker"
|
|
"github.com/restic/restic/backend"
|
|
"github.com/restic/restic/crypto"
|
|
"github.com/restic/restic/debug"
|
|
"github.com/restic/restic/pack"
|
|
)
|
|
|
|
// packerManager keeps a list of open packs and creates new on demand.
|
|
type packerManager struct {
|
|
be backend.Backend
|
|
key *crypto.Key
|
|
pm sync.Mutex
|
|
packs []*pack.Packer
|
|
}
|
|
|
|
const minPackSize = 4 * chunker.MiB
|
|
const maxPackSize = 16 * chunker.MiB
|
|
const maxPackers = 200
|
|
|
|
// findPacker returns a packer for a new blob of size bytes. Either a new one is
|
|
// created or one is returned that already has some blobs.
|
|
func (r *packerManager) findPacker(size uint) (*pack.Packer, error) {
|
|
r.pm.Lock()
|
|
defer r.pm.Unlock()
|
|
|
|
// search for a suitable packer
|
|
if len(r.packs) > 0 {
|
|
debug.Log("Repo.findPacker", "searching packer for %d bytes\n", size)
|
|
for i, p := range r.packs {
|
|
if p.Size()+size < maxPackSize {
|
|
debug.Log("Repo.findPacker", "found packer %v", p)
|
|
// remove from list
|
|
r.packs = append(r.packs[:i], r.packs[i+1:]...)
|
|
return p, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
// no suitable packer found, return new
|
|
blob, err := r.be.Create()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
debug.Log("Repo.findPacker", "create new pack %p for %d bytes", blob, size)
|
|
return pack.NewPacker(r.key, blob), nil
|
|
}
|
|
|
|
// insertPacker appends p to s.packs.
|
|
func (r *packerManager) insertPacker(p *pack.Packer) {
|
|
r.pm.Lock()
|
|
defer r.pm.Unlock()
|
|
|
|
r.packs = append(r.packs, p)
|
|
debug.Log("Repo.insertPacker", "%d packers\n", len(r.packs))
|
|
}
|
|
|
|
// savePacker stores p in the backend.
|
|
func (r *Repository) savePacker(p *pack.Packer) error {
|
|
debug.Log("Repo.savePacker", "save packer with %d blobs\n", p.Count())
|
|
_, err := p.Finalize()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// move file to the final location
|
|
sid := p.ID()
|
|
err = p.Writer().(backend.Blob).Finalize(backend.Data, sid.String())
|
|
if err != nil {
|
|
debug.Log("Repo.savePacker", "blob Finalize() error: %v", err)
|
|
return err
|
|
}
|
|
|
|
debug.Log("Repo.savePacker", "saved as %v", sid.Str())
|
|
|
|
// update blobs in the index
|
|
for _, b := range p.Blobs() {
|
|
debug.Log("Repo.savePacker", " updating blob %v to pack %v", b.ID.Str(), sid.Str())
|
|
r.idx.Current().Store(PackedBlob{
|
|
Type: b.Type,
|
|
ID: b.ID,
|
|
PackID: sid,
|
|
Offset: b.Offset,
|
|
Length: uint(b.Length),
|
|
})
|
|
r.idx.RemoveFromInFlight(b.ID)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// countPacker returns the number of open (unfinished) packers.
|
|
func (r *packerManager) countPacker() int {
|
|
r.pm.Lock()
|
|
defer r.pm.Unlock()
|
|
|
|
return len(r.packs)
|
|
}
|