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compress blocs with zstd

This commit is contained in:
Trinity Pointard 2021-03-17 20:37:31 +01:00
parent 7560a41ab1
commit de8e47435f
4 changed files with 140 additions and 25 deletions
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42
Cargo.lock generated
View File

@ -95,6 +95,9 @@ name = "cc"
version = "1.0.67"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e3c69b077ad434294d3ce9f1f6143a2a4b89a8a2d54ef813d85003a4fd1137fd"
dependencies = [
"jobserver",
]
[[package]]
name = "cfg-if"
@ -429,6 +432,7 @@ dependencies = [
"serde_bytes",
"sled",
"tokio",
"zstd",
]
[[package]]
@ -779,6 +783,15 @@ version = "0.4.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
[[package]]
name = "jobserver"
version = "0.1.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5c71313ebb9439f74b00d9d2dcec36440beaf57a6aa0623068441dd7cd81a7f2"
dependencies = [
"libc",
]
[[package]]
name = "js-sys"
version = "0.3.49"
@ -1769,3 +1782,32 @@ name = "xxhash-rust"
version = "0.8.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e575e15bedf6e57b5c2d763ffc6c3c760143466cbd09d762d539680ab5992ded"
[[package]]
name = "zstd"
version = "0.6.1+zstd.1.4.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5de55e77f798f205d8561b8fe2ef57abfb6e0ff2abe7fd3c089e119cdb5631a3"
dependencies = [
"zstd-safe",
]
[[package]]
name = "zstd-safe"
version = "3.0.1+zstd.1.4.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1387cabcd938127b30ce78c4bf00b30387dddf704e3f0881dbc4ff62b5566f8c"
dependencies = [
"libc",
"zstd-sys",
]
[[package]]
name = "zstd-sys"
version = "1.4.20+zstd.1.4.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ebd5b733d7cf2d9447e2c3e76a5589b4f5e5ae065c22a2bc0b023cbc331b6c8e"
dependencies = [
"cc",
"libc",
]

2
src/model/Cargo.toml
View File

@ -21,8 +21,8 @@ arc-swap = "1.0"
hex = "0.4"
log = "0.4"
rand = "0.8"
sled = "0.34"
zstd = "0.6.1"
rmp-serde = "0.15"
serde = { version = "1.0", default-features = false, features = ["derive", "rc"] }

117
src/model/block.rs
View File

@ -9,6 +9,7 @@ use serde::{Deserialize, Serialize};
use tokio::fs;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::sync::{watch, Mutex, Notify};
use zstd::stream::{decode_all as zstd_decode, encode_all as zstd_encode};
use garage_util::data::*;
use garage_util::error::Error;
@ -43,6 +44,7 @@ pub enum Message {
/// Message to send a block of data, either because requested, of for first delivery of new
/// block
PutBlock(PutBlockMessage),
PutCompressedBlock(PutBlockMessage),
/// Ask other node if they should have this block, but don't actually have it
NeedBlockQuery(Hash),
/// Response : whether the node do require that block
@ -134,7 +136,8 @@ impl BlockManager {
async fn handle(self: Arc<Self>, msg: &Message) -> Result<Message, Error> {
match msg {
Message::PutBlock(m) => self.write_block(&m.hash, &m.data).await,
Message::PutBlock(m) => self.write_block(&m.hash, &m.data, false).await,
Message::PutCompressedBlock(m) => self.write_block(&m.hash, &m.data, true).await,
Message::GetBlock(h) => self.read_block(h).await,
Message::NeedBlockQuery(h) => self.need_block(h).await.map(Message::NeedBlockReply),
_ => Err(Error::BadRPC(format!("Unexpected RPC message"))),
@ -157,15 +160,23 @@ impl BlockManager {
}
/// Write a block to disk
async fn write_block(&self, hash: &Hash, data: &[u8]) -> Result<Message, Error> {
pub async fn write_block(
&self,
hash: &Hash,
data: &[u8],
compressed: bool,
) -> Result<Message, Error> {
if self.is_block_compressed(hash).await.is_ok() {
return Ok(Message::Ok);
}
let _lock = self.data_dir_lock.lock().await;
let mut path = self.block_dir(hash);
fs::create_dir_all(&path).await?;
path.push(hex::encode(hash));
if fs::metadata(&path).await.is_ok() {
return Ok(Message::Ok);
if compressed {
path.set_extension("zst");
}
let mut f = fs::File::create(path).await?;
@ -176,35 +187,61 @@ impl BlockManager {
}
/// Read block from disk, verifying it's integrity
async fn read_block(&self, hash: &Hash) -> Result<Message, Error> {
let path = self.block_path(hash);
pub async fn read_block(&self, hash: &Hash) -> Result<Message, Error> {
let mut path = self.block_path(hash);
let mut f = match fs::File::open(&path).await {
Ok(f) => f,
Err(e) => {
let mut data = vec![];
let block = match self.is_block_compressed(hash).await {
Ok(false) => {
let f = fs::File::open(&path).await;
f.map(|f| (f, false)).map_err(Into::into)
}
Ok(true) => {
path.set_extension("zst");
let f = fs::File::open(&path).await;
f.map(|f| (f, true)).map_err(Into::into)
}
Err(e) => Err(e),
};
let (mut f, compressed) = match block {
Ok(ok) => ok,
e => {
// Not found but maybe we should have had it ??
self.put_to_resync(hash, Duration::from_millis(0))?;
return Err(Into::into(e));
e?
}
};
let mut data = vec![];
f.read_to_end(&mut data).await?;
drop(f);
if blake2sum(&data[..]) != *hash {
let sum = if compressed {
zstd_decode(&data[..])
.ok()
.map(|decompressed| blake2sum(&decompressed[..]))
} else {
Some(blake2sum(&data[..]))
};
if sum.is_none() || sum.unwrap() != *hash {
let _lock = self.data_dir_lock.lock().await;
warn!(
"Block {:?} is corrupted. Renaming to .corrupted and resyncing.",
hash
);
let mut path2 = path.clone();
path2.set_extension(".corrupted");
path2.set_extension("corrupted");
fs::rename(path, path2).await?;
self.put_to_resync(&hash, Duration::from_millis(0))?;
return Err(Error::CorruptData(*hash));
}
Ok(Message::PutBlock(PutBlockMessage { hash: *hash, data }))
if compressed {
Ok(Message::PutCompressedBlock(PutBlockMessage {
hash: *hash,
data,
}))
} else {
Ok(Message::PutBlock(PutBlockMessage { hash: *hash, data }))
}
}
/// Check if this node should have a block, but don't actually have it
@ -215,14 +252,22 @@ impl BlockManager {
.map(|x| u64_from_be_bytes(x) > 0)
.unwrap_or(false);
if needed {
let path = self.block_path(hash);
let exists = fs::metadata(&path).await.is_ok();
let exists = self.is_block_compressed(hash).await.is_ok();
Ok(!exists)
} else {
Ok(false)
}
}
async fn is_block_compressed(&self, hash: &Hash) -> Result<bool, Error> {
let mut path = self.block_path(hash);
if fs::metadata(&path).await.is_ok() {
return Ok(false);
}
path.set_extension("zst");
fs::metadata(&path).await.map(|_| true).map_err(Into::into)
}
fn block_dir(&self, hash: &Hash) -> PathBuf {
let mut path = self.data_dir.clone();
path.push(hex::encode(&hash.as_slice()[0..1]));
@ -323,7 +368,7 @@ impl BlockManager {
let path = self.block_path(hash);
let exists = fs::metadata(&path).await.is_ok();
let exists = self.is_block_compressed(hash).await.is_ok();
let needed = self
.rc
.get(hash.as_ref())?
@ -402,15 +447,14 @@ impl BlockManager {
// TODO find a way to not do this if they are sending it to us
// Let's suppose this isn't an issue for now with the BLOCK_RW_TIMEOUT delay
// between the RC being incremented and this part being called.
let block_data = self.rpc_get_block(&hash).await?;
self.write_block(hash, &block_data[..]).await?;
let (block_data, compressed) = self.rpc_get_raw_block(&hash).await?;
self.write_block(hash, &block_data[..], compressed).await?;
}
Ok(())
}
/// Ask nodes that might have a block for it
pub async fn rpc_get_block(&self, hash: &Hash) -> Result<Vec<u8>, Error> {
async fn rpc_get_raw_block(&self, hash: &Hash) -> Result<(Vec<u8>, bool), Error> {
let who = self.replication.read_nodes(&hash);
let resps = self
.rpc_client
@ -424,8 +468,10 @@ impl BlockManager {
.await?;
for resp in resps {
if let Message::PutBlock(msg) = resp {
return Ok(msg.data);
match resp {
Message::PutBlock(msg) => return Ok((msg.data, false)),
Message::PutCompressedBlock(msg) => return Ok((msg.data, true)),
_ => {}
}
}
Err(Error::Message(format!(
@ -434,13 +480,36 @@ impl BlockManager {
)))
}
/// 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
.and_then(|(data, compressed)| {
if compressed {
zstd_decode(&data[..]).map_err(|_| Error::CorruptData(*hash))
} else {
Ok(data)
}
})
}
/// Send block to nodes that should have it
pub async fn rpc_put_block(&self, hash: Hash, data: Vec<u8>) -> Result<(), Error> {
let garage = self.garage.load_full().unwrap();
let compressed = zstd_encode(&data[..], garage.config.compression_level);
let message = if compressed.is_ok() && compressed.as_ref().unwrap().len() < data.len() {
Message::PutCompressedBlock(PutBlockMessage {
hash,
data: compressed.unwrap(),
})
} else {
Message::PutBlock(PutBlockMessage { hash, data })
};
let who = self.replication.write_nodes(&hash);
self.rpc_client
.try_call_many(
&who[..],
Message::PutBlock(PutBlockMessage { hash, data }),
message,
RequestStrategy::with_quorum(self.replication.write_quorum())
.with_timeout(BLOCK_RW_TIMEOUT),
)

4
src/util/config.rs
View File

@ -45,6 +45,10 @@ pub struct Config {
#[serde(default = "default_replication_factor")]
pub data_replication_factor: usize,
/// Zstd compression level used on data blocks
#[serde(default)]
pub compression_level: i32,
/// Configuration for RPC TLS
pub rpc_tls: Option<TlsConfig>,