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vfs: add --vfs-writeback option to delay writes back to cloud storage

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This is enabled by default and can be disabled with --vfs-writeback 0
This commit is contained in:
Nick Craig-Wood
2020-04-17 11:18:58 +01:00
parent 28255f1bac
commit e4e53a2e61
19 changed files with 958 additions and 385 deletions
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31
vfs/read_test.go
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@@ -12,8 +12,8 @@ import (
)
// Open a file for write
func readHandleCreate(t *testing.T, r *fstest.Run) (*VFS, *ReadFileHandle) {
vfs := New(r.Fremote, nil)
func readHandleCreate(t *testing.T) (r *fstest.Run, vfs *VFS, fh *ReadFileHandle, cleanup func()) {
r, vfs, cleanup = newTestVFS(t)
file1 := r.WriteObject(context.Background(), "dir/file1", "0123456789abcdef", t1)
fstest.CheckItems(t, r.Fremote, file1)
@@ -23,7 +23,7 @@ func readHandleCreate(t *testing.T, r *fstest.Run) (*VFS, *ReadFileHandle) {
fh, ok := h.(*ReadFileHandle)
require.True(t, ok)
return vfs, fh
return r, vfs, fh, cleanup
}
// read data from the string
@@ -37,9 +37,8 @@ func readString(t *testing.T, fh *ReadFileHandle, n int) string {
}
func TestReadFileHandleMethods(t *testing.T) {
r := fstest.NewRun(t)
defer r.Finalise()
_, fh := readHandleCreate(t, r)
_, _, fh, cleanup := readHandleCreate(t)
defer cleanup()
// String
assert.Equal(t, "dir/file1 (r)", fh.String())
@@ -81,9 +80,8 @@ func TestReadFileHandleMethods(t *testing.T) {
}
func TestReadFileHandleSeek(t *testing.T) {
r := fstest.NewRun(t)
defer r.Finalise()
_, fh := readHandleCreate(t, r)
_, _, fh, cleanup := readHandleCreate(t)
defer cleanup()
assert.Equal(t, "0", readString(t, fh, 1))
@@ -125,9 +123,8 @@ func TestReadFileHandleSeek(t *testing.T) {
}
func TestReadFileHandleReadAt(t *testing.T) {
r := fstest.NewRun(t)
defer r.Finalise()
_, fh := readHandleCreate(t, r)
_, _, fh, cleanup := readHandleCreate(t)
defer cleanup()
// read from start
buf := make([]byte, 1)
@@ -182,9 +179,8 @@ func TestReadFileHandleReadAt(t *testing.T) {
}
func TestReadFileHandleFlush(t *testing.T) {
r := fstest.NewRun(t)
defer r.Finalise()
_, fh := readHandleCreate(t, r)
_, _, fh, cleanup := readHandleCreate(t)
defer cleanup()
// Check Flush does nothing if read not called
err := fh.Flush()
@@ -212,9 +208,8 @@ func TestReadFileHandleFlush(t *testing.T) {
}
func TestReadFileHandleRelease(t *testing.T) {
r := fstest.NewRun(t)
defer r.Finalise()
_, fh := readHandleCreate(t, r)
_, _, fh, cleanup := readHandleCreate(t)
defer cleanup()
// Check Release does nothing if file not read from
err := fh.Release()