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-rw-r--r--src/block/Cargo.toml4
-rw-r--r--src/block/block.rs37
-rw-r--r--src/block/manager.rs267
-rw-r--r--src/block/resync.rs35
4 files changed, 265 insertions, 78 deletions
diff --git a/src/block/Cargo.toml b/src/block/Cargo.toml
index 8cf5a01c..cd409001 100644
--- a/src/block/Cargo.toml
+++ b/src/block/Cargo.toml
@@ -27,6 +27,8 @@ bytes = "1.0"
hex = "0.4"
tracing = "0.1.30"
rand = "0.8"
+
+async-compression = { version = "0.3", features = ["tokio", "zstd"] }
zstd = { version = "0.9", default-features = false }
rmp-serde = "0.15"
@@ -36,7 +38,7 @@ serde_bytes = "0.11"
futures = "0.3"
futures-util = "0.3"
tokio = { version = "1.0", default-features = false, features = ["rt", "rt-multi-thread", "io-util", "net", "time", "macros", "sync", "signal", "fs"] }
-
+tokio-util = { version = "0.6", features = ["io"] }
[features]
system-libs = [ "zstd/pkg-config" ]
diff --git a/src/block/block.rs b/src/block/block.rs
index f17bd2c0..935aa900 100644
--- a/src/block/block.rs
+++ b/src/block/block.rs
@@ -5,13 +5,18 @@ use zstd::stream::{decode_all as zstd_decode, Encoder};
use garage_util::data::*;
use garage_util::error::*;
+#[derive(Debug, Serialize, Deserialize, Copy, Clone)]
+pub enum DataBlockHeader {
+ Plain,
+ Compressed,
+}
+
/// A possibly compressed block of data
-#[derive(Debug, Serialize, Deserialize)]
pub enum DataBlock {
/// Uncompressed data
- Plain(#[serde(with = "serde_bytes")] Vec<u8>),
+ Plain(Bytes),
/// Data compressed with zstd
- Compressed(#[serde(with = "serde_bytes")] Vec<u8>),
+ Compressed(Bytes),
}
impl DataBlock {
@@ -31,7 +36,7 @@ impl DataBlock {
/// Get the buffer, possibly decompressing it, and verify it's integrity.
/// For Plain block, data is compared to hash, for Compressed block, zstd checksumming system
/// is used instead.
- pub fn verify_get(self, hash: Hash) -> Result<Vec<u8>, Error> {
+ pub fn verify_get(self, hash: Hash) -> Result<Bytes, Error> {
match self {
DataBlock::Plain(data) => {
if blake2sum(&data) == hash {
@@ -40,9 +45,9 @@ impl DataBlock {
Err(Error::CorruptData(hash))
}
}
- DataBlock::Compressed(data) => {
- zstd_decode(&data[..]).map_err(|_| Error::CorruptData(hash))
- }
+ DataBlock::Compressed(data) => zstd_decode(&data[..])
+ .map_err(|_| Error::CorruptData(hash))
+ .map(Bytes::from),
}
}
@@ -66,14 +71,28 @@ impl DataBlock {
tokio::task::spawn_blocking(move || {
if let Some(level) = level {
if let Ok(data) = zstd_encode(&data[..], level) {
- return DataBlock::Compressed(data);
+ return DataBlock::Compressed(data.into());
}
}
- DataBlock::Plain(data.to_vec()) // TODO: remove to_vec here
+ DataBlock::Plain(data)
})
.await
.unwrap()
}
+
+ pub fn into_parts(self) -> (DataBlockHeader, Bytes) {
+ match self {
+ DataBlock::Plain(data) => (DataBlockHeader::Plain, data),
+ DataBlock::Compressed(data) => (DataBlockHeader::Compressed, data),
+ }
+ }
+
+ pub fn from_parts(h: DataBlockHeader, bytes: Bytes) -> Self {
+ match h {
+ DataBlockHeader::Plain => DataBlock::Plain(bytes),
+ DataBlockHeader::Compressed => DataBlock::Compressed(bytes),
+ }
+ }
}
fn zstd_encode<R: std::io::Read>(mut source: R, level: i32) -> std::io::Result<Vec<u8>> {
diff --git a/src/block/manager.rs b/src/block/manager.rs
index b5199b62..b9cd09e7 100644
--- a/src/block/manager.rs
+++ b/src/block/manager.rs
@@ -1,4 +1,5 @@
use std::path::PathBuf;
+use std::pin::Pin;
use std::sync::Arc;
use std::time::Duration;
@@ -6,8 +7,10 @@ use async_trait::async_trait;
use bytes::Bytes;
use serde::{Deserialize, Serialize};
+use futures::Stream;
+use futures_util::stream::StreamExt;
use tokio::fs;
-use tokio::io::{AsyncReadExt, AsyncWriteExt};
+use tokio::io::{AsyncReadExt, AsyncWriteExt, BufReader};
use tokio::sync::{mpsc, Mutex};
use opentelemetry::{
@@ -15,12 +18,15 @@ use opentelemetry::{
Context,
};
+use garage_rpc::rpc_helper::netapp::stream::{stream_asyncread, ByteStream};
+
use garage_db as db;
use garage_util::data::*;
use garage_util::error::*;
use garage_util::metrics::RecordDuration;
+use garage_rpc::rpc_helper::OrderTag;
use garage_rpc::system::System;
use garage_rpc::*;
@@ -36,7 +42,7 @@ use crate::resync::*;
pub const INLINE_THRESHOLD: usize = 3072;
// Timeout for RPCs that read and write blocks to remote nodes
-pub(crate) const BLOCK_RW_TIMEOUT: Duration = Duration::from_secs(30);
+pub(crate) const BLOCK_RW_TIMEOUT: Duration = Duration::from_secs(60);
// The delay between the moment when the reference counter
// drops to zero, and the moment where we allow ourselves
@@ -48,12 +54,12 @@ pub(crate) const BLOCK_GC_DELAY: Duration = Duration::from_secs(600);
pub enum BlockRpc {
Ok,
/// Message to ask for a block of data, by hash
- GetBlock(Hash),
+ GetBlock(Hash, Option<OrderTag>),
/// Message to send a block of data, either because requested, of for first delivery of new
/// block
PutBlock {
hash: Hash,
- data: DataBlock,
+ header: DataBlockHeader,
},
/// Ask other node if they should have this block, but don't actually have it
NeedBlockQuery(Hash),
@@ -143,56 +149,162 @@ impl BlockManager {
}
/// Ask nodes that might have a (possibly compressed) block for it
- pub(crate) async fn rpc_get_raw_block(&self, hash: &Hash) -> Result<DataBlock, Error> {
+ /// Return it as a stream with a header
+ async fn rpc_get_raw_block_streaming(
+ &self,
+ hash: &Hash,
+ order_tag: Option<OrderTag>,
+ ) -> Result<(DataBlockHeader, ByteStream), Error> {
let who = self.replication.read_nodes(hash);
- let resps = self
- .system
- .rpc
- .try_call_many(
- &self.endpoint,
- &who[..],
- BlockRpc::GetBlock(*hash),
- RequestStrategy::with_priority(PRIO_NORMAL)
- .with_quorum(1)
- .with_timeout(BLOCK_RW_TIMEOUT)
- .interrupt_after_quorum(true),
- )
- .await?;
+ let who = self.system.rpc.request_order(&who);
+
+ for node in who.iter() {
+ let node_id = NodeID::from(*node);
+ let rpc = self.endpoint.call_streaming(
+ &node_id,
+ BlockRpc::GetBlock(*hash, order_tag),
+ PRIO_NORMAL | PRIO_SECONDARY,
+ );
+ tokio::select! {
+ res = rpc => {
+ let res = match res {
+ Ok(res) => res,
+ Err(e) => {
+ debug!("Node {:?} returned error: {}", node, e);
+ continue;
+ }
+ };
+ let (header, stream) = match res.into_parts() {
+ (Ok(BlockRpc::PutBlock { hash: _, header }), Some(stream)) => (header, stream),
+ _ => {
+ debug!("Node {:?} returned a malformed response", node);
+ continue;
+ }
+ };
+ return Ok((header, stream));
+ }
+ _ = tokio::time::sleep(BLOCK_RW_TIMEOUT) => {
+ debug!("Node {:?} didn't return block in time, trying next.", node);
+ }
+ };
+ }
- for resp in resps {
- if let BlockRpc::PutBlock { data, .. } = resp {
- return Ok(data);
- }
+ Err(Error::Message(format!(
+ "Unable to read block {:?}: no node returned a valid block",
+ hash
+ )))
+ }
+
+ /// Ask nodes that might have a (possibly compressed) block for it
+ /// Return its entire body
+ pub(crate) async fn rpc_get_raw_block(
+ &self,
+ hash: &Hash,
+ order_tag: Option<OrderTag>,
+ ) -> Result<DataBlock, Error> {
+ let who = self.replication.read_nodes(hash);
+ let who = self.system.rpc.request_order(&who);
+
+ for node in who.iter() {
+ let node_id = NodeID::from(*node);
+ let rpc = self.endpoint.call_streaming(
+ &node_id,
+ BlockRpc::GetBlock(*hash, order_tag),
+ PRIO_NORMAL | PRIO_SECONDARY,
+ );
+ tokio::select! {
+ res = rpc => {
+ let res = match res {
+ Ok(res) => res,
+ Err(e) => {
+ debug!("Node {:?} returned error: {}", node, e);
+ continue;
+ }
+ };
+ let (header, stream) = match res.into_parts() {
+ (Ok(BlockRpc::PutBlock { hash: _, header }), Some(stream)) => (header, stream),
+ _ => {
+ debug!("Node {:?} returned a malformed response", node);
+ continue;
+ }
+ };
+ match read_stream_to_end(stream).await {
+ Ok(bytes) => return Ok(DataBlock::from_parts(header, bytes)),
+ Err(e) => {
+ debug!("Error reading stream from node {:?}: {}", node, e);
+ }
+ }
+ }
+ _ = tokio::time::sleep(BLOCK_RW_TIMEOUT) => {
+ debug!("Node {:?} didn't return block in time, trying next.", node);
+ }
+ };
}
+
Err(Error::Message(format!(
- "Unable to read block {:?}: no valid blocks returned",
+ "Unable to read block {:?}: no node returned a valid block",
hash
)))
}
// ---- Public interface ----
+ /// Ask nodes that might have a block for it,
+ /// return it as a stream
+ pub async fn rpc_get_block_streaming(
+ &self,
+ hash: &Hash,
+ order_tag: Option<OrderTag>,
+ ) -> Result<
+ Pin<Box<dyn Stream<Item = Result<Bytes, std::io::Error>> + Send + Sync + 'static>>,
+ Error,
+ > {
+ let (header, stream) = self.rpc_get_raw_block_streaming(hash, order_tag).await?;
+ match header {
+ DataBlockHeader::Plain => Ok(Box::pin(stream)),
+ DataBlockHeader::Compressed => {
+ // Too many things, I hate it.
+ let reader = stream_asyncread(stream);
+ let reader = BufReader::new(reader);
+ let reader = async_compression::tokio::bufread::ZstdDecoder::new(reader);
+ Ok(Box::pin(tokio_util::io::ReaderStream::new(reader)))
+ }
+ }
+ }
+
/// Ask nodes that might have a block for it
- pub async fn rpc_get_block(&self, hash: &Hash) -> Result<Vec<u8>, Error> {
- self.rpc_get_raw_block(hash).await?.verify_get(*hash)
+ pub async fn rpc_get_block(
+ &self,
+ hash: &Hash,
+ order_tag: Option<OrderTag>,
+ ) -> Result<Bytes, Error> {
+ self.rpc_get_raw_block(hash, order_tag)
+ .await?
+ .verify_get(*hash)
}
/// Send block to nodes that should have it
pub async fn rpc_put_block(&self, hash: Hash, data: Bytes) -> Result<(), Error> {
let who = self.replication.write_nodes(&hash);
- let data = DataBlock::from_buffer(data, self.compression_level).await;
+
+ let (header, bytes) = DataBlock::from_buffer(data, self.compression_level)
+ .await
+ .into_parts();
+ let put_block_rpc =
+ Req::new(BlockRpc::PutBlock { hash, header })?.with_stream_from_buffer(bytes);
+
self.system
.rpc
.try_call_many(
&self.endpoint,
&who[..],
- // TODO: remove to_vec() here
- BlockRpc::PutBlock { hash, data },
- RequestStrategy::with_priority(PRIO_NORMAL)
+ put_block_rpc,
+ RequestStrategy::with_priority(PRIO_NORMAL | PRIO_SECONDARY)
.with_quorum(self.replication.write_quorum())
.with_timeout(BLOCK_RW_TIMEOUT),
)
.await?;
+
Ok(())
}
@@ -259,17 +371,25 @@ impl BlockManager {
// ---- Reading and writing blocks locally ----
- /// Write a block to disk
- pub(crate) async fn write_block(
+ async fn handle_put_block(
&self,
- hash: &Hash,
- data: &DataBlock,
- ) -> Result<BlockRpc, Error> {
+ hash: Hash,
+ header: DataBlockHeader,
+ stream: Option<ByteStream>,
+ ) -> Result<(), Error> {
+ let stream = stream.ok_or_message("missing stream")?;
+ let bytes = read_stream_to_end(stream).await?;
+ let data = DataBlock::from_parts(header, bytes);
+ self.write_block(&hash, &data).await
+ }
+
+ /// Write a block to disk
+ pub(crate) async fn write_block(&self, hash: &Hash, data: &DataBlock) -> Result<(), Error> {
let tracer = opentelemetry::global::tracer("garage");
let write_size = data.inner_buffer().len() as u64;
- let res = self.mutation_lock[hash.as_slice()[0] as usize]
+ self.mutation_lock[hash.as_slice()[0] as usize]
.lock()
.with_context(Context::current_with_span(
tracer.start("Acquire mutation_lock"),
@@ -284,11 +404,32 @@ impl BlockManager {
self.metrics.bytes_written.add(write_size);
- Ok(res)
+ Ok(())
+ }
+
+ async fn handle_get_block(&self, hash: &Hash, order_tag: Option<OrderTag>) -> Resp<BlockRpc> {
+ let block = match self.read_block(hash).await {
+ Ok(data) => data,
+ Err(e) => return Resp::new(Err(e)),
+ };
+
+ let (header, data) = block.into_parts();
+
+ let resp = Resp::new(Ok(BlockRpc::PutBlock {
+ hash: *hash,
+ header,
+ }))
+ .with_stream_from_buffer(data);
+
+ if let Some(order_tag) = order_tag {
+ resp.with_order_tag(order_tag)
+ } else {
+ resp
+ }
}
/// Read block from disk, verifying it's integrity
- pub(crate) async fn read_block(&self, hash: &Hash) -> Result<BlockRpc, Error> {
+ pub(crate) async fn read_block(&self, hash: &Hash) -> Result<DataBlock, Error> {
let data = self
.read_block_internal(hash)
.bound_record_duration(&self.metrics.block_read_duration)
@@ -298,7 +439,7 @@ impl BlockManager {
.bytes_read
.add(data.inner_buffer().len() as u64);
- Ok(BlockRpc::PutBlock { hash: *hash, data })
+ Ok(data)
}
async fn read_block_internal(&self, hash: &Hash) -> Result<DataBlock, Error> {
@@ -321,9 +462,9 @@ impl BlockManager {
drop(f);
let data = if compressed {
- DataBlock::Compressed(data)
+ DataBlock::Compressed(data.into())
} else {
- DataBlock::Plain(data)
+ DataBlock::Plain(data.into())
};
if data.verify(*hash).is_err() {
@@ -394,17 +535,19 @@ impl BlockManager {
}
#[async_trait]
-impl EndpointHandler<BlockRpc> for BlockManager {
- async fn handle(
- self: &Arc<Self>,
- message: &BlockRpc,
- _from: NodeID,
- ) -> Result<BlockRpc, Error> {
- match message {
- BlockRpc::PutBlock { hash, data } => self.write_block(hash, data).await,
- BlockRpc::GetBlock(h) => self.read_block(h).await,
- BlockRpc::NeedBlockQuery(h) => self.need_block(h).await.map(BlockRpc::NeedBlockReply),
- m => Err(Error::unexpected_rpc_message(m)),
+impl StreamingEndpointHandler<BlockRpc> for BlockManager {
+ async fn handle(self: &Arc<Self>, mut message: Req<BlockRpc>, _from: NodeID) -> Resp<BlockRpc> {
+ match message.msg() {
+ BlockRpc::PutBlock { hash, header } => Resp::new(
+ self.handle_put_block(*hash, *header, message.take_stream())
+ .await
+ .map(|_| BlockRpc::Ok),
+ ),
+ BlockRpc::GetBlock(h, order_tag) => self.handle_get_block(h, *order_tag).await,
+ BlockRpc::NeedBlockQuery(h) => {
+ Resp::new(self.need_block(h).await.map(BlockRpc::NeedBlockReply))
+ }
+ m => Resp::new(Err(Error::unexpected_rpc_message(m))),
}
}
}
@@ -431,7 +574,7 @@ impl BlockManagerLocked {
hash: &Hash,
data: &DataBlock,
mgr: &BlockManager,
- ) -> Result<BlockRpc, Error> {
+ ) -> Result<(), Error> {
let compressed = data.is_compressed();
let data = data.inner_buffer();
@@ -442,8 +585,8 @@ impl BlockManagerLocked {
fs::create_dir_all(&directory).await?;
let to_delete = match (mgr.is_block_compressed(hash).await, compressed) {
- (Ok(true), _) => return Ok(BlockRpc::Ok),
- (Ok(false), false) => return Ok(BlockRpc::Ok),
+ (Ok(true), _) => return Ok(()),
+ (Ok(false), false) => return Ok(()),
(Ok(false), true) => {
let path_to_delete = path.clone();
path.set_extension("zst");
@@ -482,7 +625,7 @@ impl BlockManagerLocked {
dir.sync_all().await?;
drop(dir);
- Ok(BlockRpc::Ok)
+ Ok(())
}
async fn move_block_to_corrupted(&self, hash: &Hash, mgr: &BlockManager) -> Result<(), Error> {
@@ -516,3 +659,17 @@ impl BlockManagerLocked {
Ok(())
}
}
+
+async fn read_stream_to_end(mut stream: ByteStream) -> Result<Bytes, Error> {
+ let mut parts: Vec<Bytes> = vec![];
+ while let Some(part) = stream.next().await {
+ parts.push(part.ok_or_message("error in stream")?);
+ }
+
+ Ok(parts
+ .iter()
+ .map(|x| &x[..])
+ .collect::<Vec<_>>()
+ .concat()
+ .into())
+}
diff --git a/src/block/resync.rs b/src/block/resync.rs
index 39e4d50f..bde3e98c 100644
--- a/src/block/resync.rs
+++ b/src/block/resync.rs
@@ -7,7 +7,6 @@ use arc_swap::ArcSwap;
use async_trait::async_trait;
use serde::{Deserialize, Serialize};
-use futures::future::*;
use tokio::select;
use tokio::sync::{watch, Notify};
@@ -36,7 +35,11 @@ use crate::manager::*;
// Timeout for RPCs that ask other nodes whether they need a copy
// of a given block before we delete it locally
-pub(crate) const NEED_BLOCK_QUERY_TIMEOUT: Duration = Duration::from_secs(5);
+// The timeout here is relatively low because we don't want to block
+// the entire resync loop when some nodes are not responding.
+// Nothing will be deleted if the nodes don't answer the queries,
+// we will just retry later.
+const NEED_BLOCK_QUERY_TIMEOUT: Duration = Duration::from_secs(15);
// The delay between the time where a resync operation fails
// and the time when it is retried, with exponential backoff
@@ -336,24 +339,24 @@ impl BlockResyncManager {
}
who.retain(|id| *id != manager.system.id);
- let msg = Arc::new(BlockRpc::NeedBlockQuery(*hash));
- let who_needs_fut = who.iter().map(|to| {
- manager.system.rpc.call_arc(
+ let who_needs_resps = manager
+ .system
+ .rpc
+ .call_many(
&manager.endpoint,
- *to,
- msg.clone(),
+ &who,
+ BlockRpc::NeedBlockQuery(*hash),
RequestStrategy::with_priority(PRIO_BACKGROUND)
.with_timeout(NEED_BLOCK_QUERY_TIMEOUT),
)
- });
- let who_needs_resps = join_all(who_needs_fut).await;
+ .await?;
let mut need_nodes = vec![];
- for (node, needed) in who.iter().zip(who_needs_resps.into_iter()) {
+ for (node, needed) in who_needs_resps {
match needed.err_context("NeedBlockQuery RPC")? {
BlockRpc::NeedBlockReply(needed) => {
if needed {
- need_nodes.push(*node);
+ need_nodes.push(node);
}
}
m => {
@@ -376,7 +379,13 @@ impl BlockResyncManager {
.add(1, &[KeyValue::new("to", format!("{:?}", node))]);
}
- let put_block_message = manager.read_block(hash).await?;
+ let block = manager.read_block(hash).await?;
+ let (header, bytes) = block.into_parts();
+ let put_block_message = Req::new(BlockRpc::PutBlock {
+ hash: *hash,
+ header,
+ })?
+ .with_stream_from_buffer(bytes);
manager
.system
.rpc
@@ -409,7 +418,7 @@ impl BlockResyncManager {
hash
);
- let block_data = manager.rpc_get_raw_block(hash).await?;
+ let block_data = manager.rpc_get_raw_block(hash, None).await?;
manager.metrics.resync_recv_counter.add(1);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 13:22:57 +0000