Struct ethcore::snapshot::io::PackedWriter
[−]
[src]
pub struct PackedWriter { /* fields omitted */ }
A packed snapshot writer. This writes snapshots to a single concatenated file.
The file format is very simple and consists of three parts: [Concatenated chunk data] [manifest as RLP] [manifest start offset (8 bytes little-endian)]
The manifest contains all the same information as a standard ManifestData
,
but also maps chunk hashes to their lengths and offsets in the file
for easy reading.
Methods
impl PackedWriter
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fn new(path: &Path) -> Result<Self>
Create a new "PackedWriter", to write into the file at the given path.
Trait Implementations
impl SnapshotWriter for PackedWriter
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fn write_state_chunk(&mut self, hash: H256, chunk: &[u8]) -> Result<()>
Write a compressed state chunk.
fn write_block_chunk(&mut self, hash: H256, chunk: &[u8]) -> Result<()>
Write a compressed block chunk.
fn finish(self, manifest: ManifestData) -> Result<()>
Complete writing. The manifest's chunk lists must be consistent with the chunks written. Read more