more info on current periodic snapshot

ethcore/src/service.rs

@@ -147,16 +147,22 @@ struct ClientIoHandler {
 }
 
 const CLIENT_TICK_TIMER: TimerToken = 0;
+const SNAPSHOT_TICK_TIMER: TimerToken = 1;
+
 const CLIENT_TICK_MS: u64 = 5000;
+const SNAPSHOT_TICK_MS: u64 = 10000;
 
 impl IoHandler<ClientIoMessage> for ClientIoHandler {
 	fn initialize(&self, io: &IoContext<ClientIoMessage>) {
 		io.register_timer(CLIENT_TICK_TIMER, CLIENT_TICK_MS).expect("Error registering client timer");
+		io.register_timer(SNAPSHOT_TICK_TIMER, SNAPSHOT_TICK_MS).expect("Error registering snapshot timer");
 	}
 
 	fn timeout(&self, _io: &IoContext<ClientIoMessage>, timer: TimerToken) {
-		if timer == CLIENT_TICK_TIMER {
-			self.client.tick();
+		match timer {
+			CLIENT_TICK_TIMER => self.client.tick(),
+			SNAPSHOT_TICK_TIMER => self.snapshot.tick(),
+			_ => warn!("IO service triggered unregistered timer '{}'", timer),
 		}
 	}
 

ethcore/src/snapshot/mod.rs

@@ -83,17 +83,28 @@ pub struct Progress {
 }
 
 impl Progress {
+	/// Reset the progress.
+	pub fn reset(&self) {
+		self.accounts.store(0, Ordering::Release);
+		self.blocks.store(0, Ordering::Release);
+		self.size.store(0, Ordering::Release);
+
+		// atomic fence here to ensure the others are written first?
+		// logs might very rarely get polluted if not.
+		self.done.store(false, Ordering::Release);
+	}
+
 	/// Get the number of accounts snapshotted thus far.
-	pub fn accounts(&self) -> usize { self.accounts.load(Ordering::Relaxed) }
+	pub fn accounts(&self) -> usize { self.accounts.load(Ordering::Acquire) }
 
 	/// Get the number of blocks snapshotted thus far.
-	pub fn blocks(&self) -> usize { self.blocks.load(Ordering::Relaxed) }
+	pub fn blocks(&self) -> usize { self.blocks.load(Ordering::Acquire) }
 
 	/// Get the written size of the snapshot in bytes.
-	pub fn size(&self) -> usize { self.size.load(Ordering::Relaxed) }
+	pub fn size(&self) -> usize { self.size.load(Ordering::Acquire) }
 
 	/// Whether the snapshot is complete.
-	pub fn done(&self) -> bool  { self.done.load(Ordering::SeqCst) }
+	pub fn done(&self) -> bool  { self.done.load(Ordering::Acquire) }
 
 }
 /// Take a snapshot using the given blockchain, starting block hash, and database, writing into the given writer.

ethcore/src/snapshot/service.rs

@@ -191,6 +191,7 @@ pub struct Service {
 	state_chunks: AtomicUsize,
 	block_chunks: AtomicUsize,
 	db_restore: Arc<DatabaseRestore>,
+	progress: super::Progress,
 }
 
 impl Service {
@@ -220,6 +221,7 @@ impl Service {
 			state_chunks: AtomicUsize::new(0),
 			block_chunks: AtomicUsize::new(0),
 			db_restore: db_restore,
+			progress: Default::default(),
 		};
 
 		// create the root snapshot dir if it doesn't exist.
@@ -297,24 +299,35 @@ impl Service {
 		Ok(())
 	}
 
+	/// Tick the snapshot service. This will log any active snapshot
+	/// being taken.
+	pub fn tick(&self) {
+		if self.progress.done() { return }
+
+		let p = &self.progress;
+		info!("Snapshot: {} accounts {} blocks {} bytes", p.accounts(), p.blocks(), p.size());
+	}
+
 	/// Take a snapshot at the block with the given number.
 	/// calling this while a restoration is in progress or vice versa
 	/// will lead to a race condition where the first one to finish will
 	/// have their produced snapshot overwritten.
 	pub fn take_snapshot(&self, client: &Client, num: u64) -> Result<(), Error> {
 		info!("Taking snapshot at #{}", num);
+		self.progress.reset();
 
 		let temp_dir = self.temp_snapshot_dir();
 		let snapshot_dir = self.snapshot_dir();
 
 		let _ = fs::remove_dir_all(&temp_dir);
 
 		let writer = try!(LooseWriter::new(temp_dir.clone()));
-		let progress = Default::default();
 
-		// Todo [rob] log progress.
 		let guard = Guard::new(temp_dir.clone());
-		try!(client.take_snapshot(writer, BlockID::Number(num), &progress));
+		try!(client.take_snapshot(writer, BlockID::Number(num), &self.progress));
+
+		info!("Finished taking snapshot at #{}", num);
+
 		let mut reader = self.reader.write();
 
 		// destroy the old snapshot reader.