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restorer: Allow writing target file blobs out of order

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Much simpler implementation that guarantees each required pack
is downloaded only once (and hence does not need to manage
pack cache). Also improves large file restore performance.

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
This commit is contained in:
Igor Fedorenko
2019-11-27 07:22:38 -05:00
committed by Leo R. Lundgren
parent f2bf06a419
commit f17ffa0283
13 changed files with 321 additions and 1448 deletions
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26
internal/restorer/fileswriter_test.go
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@@ -16,23 +16,21 @@ func TestFilesWriterBasic(t *testing.T) {
f1 := dir + "/f1"
f2 := dir + "/f2"
rtest.OK(t, w.writeToFile(f1, []byte{1}))
rtest.Equals(t, 1, len(w.cache))
rtest.Equals(t, 1, len(w.inprogress))
rtest.OK(t, w.writeToFile(f1, []byte{1}, 0, true))
rtest.Equals(t, 0, len(w.buckets[0].files))
rtest.Equals(t, 0, len(w.buckets[0].users))
rtest.OK(t, w.writeToFile(f2, []byte{2}))
rtest.Equals(t, 1, len(w.cache))
rtest.Equals(t, 2, len(w.inprogress))
rtest.OK(t, w.writeToFile(f2, []byte{2}, 0, true))
rtest.Equals(t, 0, len(w.buckets[0].files))
rtest.Equals(t, 0, len(w.buckets[0].users))
rtest.OK(t, w.writeToFile(f1, []byte{1}))
w.close(f1)
rtest.Equals(t, 0, len(w.cache))
rtest.Equals(t, 1, len(w.inprogress))
rtest.OK(t, w.writeToFile(f1, []byte{1}, 1, false))
rtest.Equals(t, 0, len(w.buckets[0].files))
rtest.Equals(t, 0, len(w.buckets[0].users))
rtest.OK(t, w.writeToFile(f2, []byte{2}))
w.close(f2)
rtest.Equals(t, 0, len(w.cache))
rtest.Equals(t, 0, len(w.inprogress))
rtest.OK(t, w.writeToFile(f2, []byte{2}, 1, false))
rtest.Equals(t, 0, len(w.buckets[0].files))
rtest.Equals(t, 0, len(w.buckets[0].users))
buf, err := ioutil.ReadFile(f1)
rtest.OK(t, err)