func findIndex(f *os.File) (*sst.Reader, error) {
// The last 8 bytes in the file is the length
// of the SSTable spaces index.
f.Seek(-8, 2)
indexLen := binary.ReadInt64(f)
return sst.NewReader(bounded.New(f, -8-indexLen, -8), indexLen)
}
func findSpaceIndex(r io.ReadSeeker, offset, length int64) (*sst.Reader, error) {
footerOffset := offset + length - 8
// The last 8 bytes in the file is the length
// of the SSTable grouping index.
r.Seek(footerOffset, 0)
indexLen := binary.ReadInt64(r)
return sst.NewReader(bounded.New(r, footerOffset-indexLen, footerOffset), indexLen)
}