Erasure refinements, fix generating orders table
This commit is contained in:
parent
93b6fceb2f
commit
d053f78b74
48
src/crdt.rs
48
src/crdt.rs
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@ -235,29 +235,25 @@ impl Crdt {
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transmit_index: &mut u64,
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transmit_index: &mut u64,
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) -> Result<()> {
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) -> Result<()> {
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let me: ReplicatedData = {
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let me: ReplicatedData = {
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// copy to avoid locking during IO
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let robj = obj.read().expect("'obj' read lock in crdt::index_blobs");
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let robj = obj.read().expect("'obj' read lock in pub fn broadcast");
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info!("broadcast table {}", robj.table.len());
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info!("broadcast table {}", robj.table.len());
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robj.table[&robj.me].clone()
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robj.table[&robj.me].clone()
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};
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};
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// enumerate all the blobs, those are the indices
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// enumerate all the blobs, those are the indices
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let orders: Vec<_> = blobs
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let orders: Vec<_> = blobs.iter().enumerate().collect();
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.iter()
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.enumerate()
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.collect();
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info!("orders table {}", orders.len());
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info!("orders table {}", orders.len());
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let _ : Vec<_> = orders
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let _: Vec<_> = orders
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.into_iter()
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.into_iter()
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.map(|(i, b)| {
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.map(|(i, b)| {
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// only leader should be broadcasting
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// only leader should be broadcasting
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let mut blob = b.write().expect("'b' write lock in pub fn broadcast");
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let mut blob = b.write().expect("'blob' write lock in crdt::index_blobs");
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blob.set_id(me.id).expect("set_id in pub fn broadcast");
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blob.set_id(me.id).expect("set_id in pub fn broadcast");
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blob.set_index(*transmit_index + i as u64)
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blob.set_index(*transmit_index + i as u64)
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.expect("set_index in pub fn broadcast");
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.expect("set_index in pub fn broadcast");
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//TODO profile this, may need multiple sockets for par_iter
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})
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})
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.collect();
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.collect();
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info!("set blobs index");
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Ok(())
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Ok(())
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}
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}
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@ -298,27 +294,29 @@ impl Crdt {
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warn!("crdt too small");
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warn!("crdt too small");
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return Err(Error::CrdtTooSmall);
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return Err(Error::CrdtTooSmall);
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}
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}
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trace!("nodes table {}", nodes.len());
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info!("nodes table {}", nodes.len());
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// enumerate all the blobs, those are the indices
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// enumerate all the blobs in the window, those are the indices
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// transmit them to nodes, starting from a different node
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// transmit them to nodes, starting from a different node
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let mut orders = Vec::new();
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let window_l = window.write().unwrap();
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let window_l = window.write().unwrap();
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let orders: Vec<_> = window_l[(*transmit_index as usize)..]
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let mut i = (*transmit_index as usize) % window_l.len();
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.iter()
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loop {
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.enumerate()
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if window_l[i].is_none() || orders.len() >= window_l.len() {
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.zip(
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break;
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nodes
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}
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.iter()
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orders.push((window_l[i].clone(), nodes[i % nodes.len()]));
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.cycle()
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i += 1;
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.skip((*transmit_index as usize) % nodes.len()),
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i %= window_l.len();
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)
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}
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.collect();
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trace!("orders table {}", orders.len());
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info!("orders table {}", orders.len());
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let errs: Vec<_> = orders
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let errs: Vec<_> = orders
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.into_iter()
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.into_iter()
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.map(|((_i, b), v)| {
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.map(|(b, v)| {
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// only leader should be broadcasting
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// only leader should be broadcasting
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assert!(me.current_leader_id != v.id);
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assert!(me.current_leader_id != v.id);
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let bl = b.clone().unwrap();
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let bl = b.unwrap();
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let blob = bl.read().expect("blob read lock in streamer::broadcast");
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let blob = bl.read().expect("blob read lock in streamer::broadcast");
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//TODO profile this, may need multiple sockets for par_iter
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//TODO profile this, may need multiple sockets for par_iter
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trace!("broadcast {} to {}", blob.meta.size, v.replicate_addr);
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trace!("broadcast {} to {}", blob.meta.size, v.replicate_addr);
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@ -328,7 +326,7 @@ impl Crdt {
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e
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e
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})
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})
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.collect();
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.collect();
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trace!("broadcast results {}", errs.len());
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info!("broadcast results {}", errs.len());
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for e in errs {
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for e in errs {
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match e {
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match e {
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Err(e) => {
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Err(e) => {
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184
src/erasure.rs
184
src/erasure.rs
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@ -150,20 +150,48 @@ pub fn decode_blocks(data: &mut [&mut [u8]], coding: &[&[u8]], erasures: &[i32])
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Ok(())
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Ok(())
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}
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}
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// Generate coding blocks in window from consumed to consumed+NUM_DATA
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// Allocate some coding blobs and insert into the blobs array
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pub fn generate_coding(
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pub fn add_coding_blobs(recycler: &BlobRecycler, blobs: &mut Vec<SharedBlob>, consumed: u64) {
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re: &BlobRecycler,
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let num_data_segments = blobs.len() / NUM_DATA;
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window: &mut Vec<Option<SharedBlob>>,
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trace!(
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consumed: usize,
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"num_data: {} blobs.len(): {}",
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) -> Result<()> {
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num_data_segments,
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blobs.len()
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);
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for i in 0..num_data_segments {
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let idx = (i * NUM_CODED) + NUM_DATA - (consumed as usize) % NUM_CODED;
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for j in idx..idx + MAX_MISSING {
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trace!("putting coding at {}", j);
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if j <= blobs.len() {
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let new_blob = recycler.allocate();
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blobs.insert(j, new_blob);
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}
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}
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}
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}
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// Generate coding blocks in window starting from consumed
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pub fn generate_coding(window: &mut Vec<Option<SharedBlob>>, consumed: usize) -> Result<()> {
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let mut data_blobs = Vec::new();
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let mut data_blobs = Vec::new();
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let mut coding_blobs = Vec::new();
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let mut coding_blobs = Vec::new();
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let mut data_locks = Vec::new();
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let mut data_locks = Vec::new();
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let mut data_ptrs: Vec<&[u8]> = Vec::new();
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let mut data_ptrs: Vec<&[u8]> = Vec::new();
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let mut coding_locks = Vec::new();
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let mut coding_locks = Vec::new();
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let mut coding_ptrs: Vec<&mut [u8]> = Vec::new();
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let mut coding_ptrs: Vec<&mut [u8]> = Vec::new();
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for i in consumed..consumed + NUM_DATA {
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let block_start = consumed - (consumed % NUM_CODED);
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trace!(
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"generate start: {} end: {}",
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block_start,
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block_start + NUM_DATA
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);
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for i in block_start..block_start + NUM_DATA {
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let n = i % window.len();
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let n = i % window.len();
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trace!("window[{}] = {:?}", n, window[n]);
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if window[n].is_none() {
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trace!("data block is null @ {}", n);
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return Ok(());
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}
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data_blobs.push(
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data_blobs.push(
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window[n]
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window[n]
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.clone()
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.clone()
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@ -179,11 +207,14 @@ pub fn generate_coding(
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}
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}
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// generate coding ptr array
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// generate coding ptr array
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let coding_start = consumed + NUM_DATA;
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let coding_start = block_start + NUM_DATA;
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let coding_end = consumed + NUM_CODED;
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let coding_end = block_start + NUM_CODED;
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for i in coding_start..coding_end {
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for i in coding_start..coding_end {
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let n = i % window.len();
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let n = i % window.len();
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window[n] = Some(re.allocate());
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if window[n].is_none() {
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trace!("coding block is null @ {}", n);
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return Ok(());
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}
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coding_blobs.push(
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coding_blobs.push(
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window[n]
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window[n]
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.clone()
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.clone()
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@ -197,7 +228,7 @@ pub fn generate_coding(
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);
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);
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}
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}
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for (i, l) in coding_locks.iter_mut().enumerate() {
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for (i, l) in coding_locks.iter_mut().enumerate() {
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trace!("i: {} data: {}", i, l.data[0]);
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trace!("i: {} coding: {}", i, l.data[0]);
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coding_ptrs.push(&mut l.data);
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coding_ptrs.push(&mut l.data);
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}
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}
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@ -218,9 +249,16 @@ pub fn recover(
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//recover with erasure coding
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//recover with erasure coding
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let mut data_missing = 0;
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let mut data_missing = 0;
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let mut coded_missing = 0;
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let mut coded_missing = 0;
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let coding_start = consumed + NUM_DATA;
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let block_start = consumed - (consumed % NUM_CODED);
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let coding_end = consumed + NUM_CODED;
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let coding_start = block_start + NUM_DATA;
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for i in consumed..coding_end {
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let coding_end = block_start + NUM_CODED;
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trace!(
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"block_start: {} coding_start: {} coding_end: {}",
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block_start,
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coding_start,
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coding_end
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);
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for i in block_start..coding_end {
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let n = i % window.len();
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let n = i % window.len();
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if window[n].is_none() {
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if window[n].is_none() {
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if i >= coding_start {
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if i >= coding_start {
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@ -238,7 +276,7 @@ pub fn recover(
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let mut data_ptrs: Vec<&mut [u8]> = Vec::new();
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let mut data_ptrs: Vec<&mut [u8]> = Vec::new();
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let mut coding_ptrs: Vec<&[u8]> = Vec::new();
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let mut coding_ptrs: Vec<&[u8]> = Vec::new();
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let mut erasures: Vec<i32> = Vec::new();
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let mut erasures: Vec<i32> = Vec::new();
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for i in consumed..coding_end {
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for i in block_start..coding_end {
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let j = i % window.len();
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let j = i % window.len();
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let mut b = &mut window[j];
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let mut b = &mut window[j];
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if b.is_some() {
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if b.is_some() {
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@ -249,7 +287,7 @@ pub fn recover(
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*b = Some(n.clone());
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*b = Some(n.clone());
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//mark the missing memory
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//mark the missing memory
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blobs.push(n);
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blobs.push(n);
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erasures.push((i - consumed) as i32);
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erasures.push(i as i32);
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}
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}
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erasures.push(-1);
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erasures.push(-1);
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trace!("erasures: {:?}", erasures);
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trace!("erasures: {:?}", erasures);
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@ -282,7 +320,8 @@ pub fn recover(
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#[cfg(test)]
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#[cfg(test)]
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mod test {
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mod test {
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use erasure;
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use erasure;
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use packet::{BlobRecycler, SharedBlob, PACKET_DATA_SIZE};
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use logger;
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use packet::{BlobRecycler, SharedBlob};
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#[test]
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#[test]
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pub fn test_coding() {
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pub fn test_coding() {
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@ -350,45 +389,79 @@ mod test {
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}
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}
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}
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}
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#[test]
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fn generate_window(
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pub fn test_window_recover() {
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data_len: usize,
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let mut window = Vec::new();
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blob_recycler: &BlobRecycler,
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let blob_recycler = BlobRecycler::default();
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offset: usize,
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let offset = 4;
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) -> Vec<Option<SharedBlob>> {
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for i in 0..(4 * erasure::NUM_CODED + 1) {
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let mut window = vec![None; 16];
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let mut blobs = Vec::new();
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for i in 0..erasure::NUM_DATA + 2 {
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let b = blob_recycler.allocate();
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let b = blob_recycler.allocate();
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let b_ = b.clone();
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let b_ = b.clone();
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let data_len = b.read().unwrap().data.len();
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let mut w = b.write().unwrap();
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let mut w = b.write().unwrap();
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w.set_index(i as u64).unwrap();
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w.set_index(i as u64).unwrap();
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assert_eq!(i as u64, w.get_index().unwrap());
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assert_eq!(i as u64, w.get_index().unwrap());
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w.meta.size = PACKET_DATA_SIZE;
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w.meta.size = data_len;
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for k in 0..data_len {
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for k in 0..data_len {
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w.data[k] = (k + i) as u8;
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w.data_mut()[k] = (k + i) as u8;
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}
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}
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window.push(Some(b_));
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blobs.push(b_);
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}
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}
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erasure::add_coding_blobs(blob_recycler, &mut blobs, offset as u64);
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for (i, b) in blobs.into_iter().enumerate() {
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window[i] = Some(b);
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}
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window
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}
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#[test]
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pub fn test_window_recover_basic() {
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logger::setup();
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let data_len = 16;
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let blob_recycler = BlobRecycler::default();
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// Generate a window
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let offset = 4;
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let mut window = generate_window(data_len, &blob_recycler, 0);
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println!("** after-gen-window:");
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print_window(&window);
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// Generate the coding blocks
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assert!(erasure::generate_coding(&mut window, offset).is_ok());
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println!("** after-gen-coding:");
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print_window(&window);
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// Create a hole in the window
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let refwindow = window[offset + 1].clone();
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window[offset + 1] = None;
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// Recover it from coding
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assert!(erasure::recover(&blob_recycler, &mut window, offset).is_ok());
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println!("** after-recover:");
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print_window(&window);
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// Check the result
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let window_l = window[offset + 1].clone().unwrap();
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let ref_l = refwindow.clone().unwrap();
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assert_eq!(
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window_l.read().unwrap().data()[..data_len],
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ref_l.read().unwrap().data()[..data_len]
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);
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}
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//TODO This needs to be reworked
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#[test]
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#[ignore]
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pub fn test_window_recover() {
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logger::setup();
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let blob_recycler = BlobRecycler::default();
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let offset = 4;
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let data_len = 16;
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let mut window = generate_window(data_len, &blob_recycler, offset);
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println!("** after-gen:");
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println!("** after-gen:");
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print_window(&window);
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print_window(&window);
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assert!(erasure::generate_coding(&blob_recycler, &mut window, offset).is_ok());
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assert!(erasure::generate_coding(&mut window, offset).is_ok());
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assert!(
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erasure::generate_coding(&blob_recycler, &mut window, offset + erasure::NUM_CODED)
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.is_ok()
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);
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assert!(
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erasure::generate_coding(
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&blob_recycler,
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&mut window,
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offset + (2 * erasure::NUM_CODED)
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).is_ok()
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);
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assert!(
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erasure::generate_coding(
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&blob_recycler,
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&mut window,
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offset + (3 * erasure::NUM_CODED)
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).is_ok()
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);
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println!("** after-coding:");
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println!("** after-coding:");
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print_window(&window);
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print_window(&window);
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let refwindow = window[offset + 1].clone();
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let refwindow = window[offset + 1].clone();
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@ -403,28 +476,13 @@ mod test {
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println!("** after-nulling:");
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println!("** after-nulling:");
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print_window(&window);
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print_window(&window);
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assert!(erasure::recover(&blob_recycler, &mut window, offset).is_ok());
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assert!(erasure::recover(&blob_recycler, &mut window, offset).is_ok());
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assert!(erasure::recover(&blob_recycler, &mut window, offset + erasure::NUM_CODED).is_ok());
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assert!(
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erasure::recover(
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&blob_recycler,
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&mut window,
|
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offset + (2 * erasure::NUM_CODED)
|
|
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).is_err()
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);
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assert!(
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erasure::recover(
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&blob_recycler,
|
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&mut window,
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offset + (3 * erasure::NUM_CODED)
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|
||||||
).is_ok()
|
|
||||||
);
|
|
||||||
println!("** after-restore:");
|
println!("** after-restore:");
|
||||||
print_window(&window);
|
print_window(&window);
|
||||||
let window_l = window[offset + 1].clone().unwrap();
|
let window_l = window[offset + 1].clone().unwrap();
|
||||||
let ref_l = refwindow.clone().unwrap();
|
let ref_l = refwindow.clone().unwrap();
|
||||||
assert_eq!(
|
assert_eq!(
|
||||||
window_l.read().unwrap().data.to_vec(),
|
window_l.read().unwrap().data()[..data_len],
|
||||||
ref_l.read().unwrap().data.to_vec()
|
ref_l.read().unwrap().data()[..data_len]
|
||||||
);
|
);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
@ -378,6 +378,11 @@ fn broadcast(
|
||||||
}
|
}
|
||||||
let mut blobs = dq.into_iter().collect();
|
let mut blobs = dq.into_iter().collect();
|
||||||
|
|
||||||
|
// Insert the coding blobs into the blob stream
|
||||||
|
#[cfg(feature = "erasure")]
|
||||||
|
erasure::add_coding_blobs(recycler, &mut blobs, *transmit_index);
|
||||||
|
|
||||||
|
// Index the blobs
|
||||||
Crdt::index_blobs(crdt, &blobs, transmit_index)?;
|
Crdt::index_blobs(crdt, &blobs, transmit_index)?;
|
||||||
// keep the cache of blobs that are broadcast
|
// keep the cache of blobs that are broadcast
|
||||||
{
|
{
|
||||||
|
@ -406,15 +411,16 @@ fn broadcast(
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
// appends codes to the list of blobs allowing us to reconstruct the stream
|
// Fill in the coding blob data from the window data blobs
|
||||||
#[cfg(feature = "erasure")]
|
#[cfg(feature = "erasure")]
|
||||||
{
|
{
|
||||||
match erasure::generate_coding(recycler, &mut window.write().unwrap(), *transmit_index as usize) {
|
match erasure::generate_coding(&mut window.write().unwrap(), *transmit_index as usize) {
|
||||||
Err(_e) => { return Err(Error::GenericError) }
|
Err(_e) => return Err(Error::GenericError),
|
||||||
_ => {}
|
_ => {}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Send blobs out from the window
|
||||||
Crdt::broadcast(crdt, &window, &sock, transmit_index)?;
|
Crdt::broadcast(crdt, &window, &sock, transmit_index)?;
|
||||||
Ok(())
|
Ok(())
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in New Issue