Faster GetObject workflow for getting entire objects

Cargo.lock

@@ -1063,6 +1063,7 @@ dependencies = [
  "serde_json",
  "sha2 0.10.2",
  "tokio",
+ "tokio-stream",
  "tracing",
  "url",
 ]

Cargo.nix

@@ -780,7 +780,7 @@ in
     registry = "registry+https://github.com/rust-lang/crates.io-index";
     src = fetchCratesIo { inherit name version; sha256 = "59a6001667ab124aebae2a495118e11d30984c3a653e99d86d58971708cf5e4b"; };
     dependencies = {
-      ${ if hostPlatform.config == "aarch64-linux-android" || hostPlatform.config == "aarch64-apple-darwin" || hostPlatform.parsed.cpu.name == "aarch64" && hostPlatform.parsed.kernel.name == "linux" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.121" { inherit profileName; };
+      ${ if hostPlatform.config == "aarch64-linux-android" || hostPlatform.parsed.cpu.name == "aarch64" && hostPlatform.parsed.kernel.name == "linux" || hostPlatform.config == "aarch64-apple-darwin" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.121" { inherit profileName; };
     };
   });
   
@@ -1506,6 +1506,7 @@ in
       ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_web" then "serde_json" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde_json."1.0.81" { inherit profileName; };
       ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_web" then "sha2" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".sha2."0.10.2" { inherit profileName; };
       ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_web" then "tokio" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio."1.17.0" { inherit profileName; };
+      ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_web" then "tokio_stream" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tokio-stream."0.1.8" { inherit profileName; };
       ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_web" then "tracing" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".tracing."0.1.32" { inherit profileName; };
       ${ if rootFeatures' ? "garage" || rootFeatures' ? "garage_api" || rootFeatures' ? "garage_web" then "url" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".url."2.2.2" { inherit profileName; };
     };
@@ -2742,7 +2743,7 @@ in
       [ "os-poll" ]
     ];
     dependencies = {
-      ${ if hostPlatform.parsed.kernel.name == "wasi" || hostPlatform.isUnix then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.121" { inherit profileName; };
+      ${ if hostPlatform.isUnix || hostPlatform.parsed.kernel.name == "wasi" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.121" { inherit profileName; };
       log = rustPackages."registry+https://github.com/rust-lang/crates.io-index".log."0.4.16" { inherit profileName; };
       ${ if hostPlatform.isWindows then "miow" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".miow."0.3.7" { inherit profileName; };
       ${ if hostPlatform.isWindows then "ntapi" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".ntapi."0.3.7" { inherit profileName; };
@@ -3886,7 +3887,7 @@ in
     ];
     dependencies = {
       ${ if hostPlatform.parsed.kernel.name == "android" || hostPlatform.parsed.kernel.name == "linux" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.121" { inherit profileName; };
-      ${ if hostPlatform.parsed.kernel.name == "dragonfly" || hostPlatform.parsed.kernel.name == "freebsd" || hostPlatform.parsed.kernel.name == "illumos" || hostPlatform.parsed.kernel.name == "netbsd" || hostPlatform.parsed.kernel.name == "openbsd" || hostPlatform.parsed.kernel.name == "solaris" || hostPlatform.parsed.kernel.name == "android" || hostPlatform.parsed.kernel.name == "linux" then "once_cell" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".once_cell."1.10.0" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "android" || hostPlatform.parsed.kernel.name == "linux" || hostPlatform.parsed.kernel.name == "dragonfly" || hostPlatform.parsed.kernel.name == "freebsd" || hostPlatform.parsed.kernel.name == "illumos" || hostPlatform.parsed.kernel.name == "netbsd" || hostPlatform.parsed.kernel.name == "openbsd" || hostPlatform.parsed.kernel.name == "solaris" then "once_cell" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".once_cell."1.10.0" { inherit profileName; };
       ${ if hostPlatform.parsed.cpu.name == "i686" || hostPlatform.parsed.cpu.name == "x86_64" || (hostPlatform.parsed.cpu.name == "aarch64" || hostPlatform.parsed.cpu.name == "armv6l" || hostPlatform.parsed.cpu.name == "armv7l") && (hostPlatform.parsed.kernel.name == "android" || hostPlatform.parsed.kernel.name == "fuchsia" || hostPlatform.parsed.kernel.name == "linux") then "spin" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".spin."0.5.2" { inherit profileName; };
       untrusted = rustPackages."registry+https://github.com/rust-lang/crates.io-index".untrusted."0.7.1" { inherit profileName; };
       ${ if hostPlatform.parsed.cpu.name == "wasm32" && hostPlatform.parsed.vendor.name == "unknown" && hostPlatform.parsed.kernel.name == "unknown" && hostPlatform.parsed.abi.name == "" then "web_sys" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".web-sys."0.3.56" { inherit profileName; };
@@ -4496,7 +4497,7 @@ in
     ];
     dependencies = {
       bitflags = rustPackages."registry+https://github.com/rust-lang/crates.io-index".bitflags."1.3.2" { inherit profileName; };
-      ${ if hostPlatform.parsed.kernel.name == "android" || hostPlatform.parsed.kernel.name == "linux" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.121" { inherit profileName; };
+      ${ if hostPlatform.parsed.kernel.name == "linux" || hostPlatform.parsed.kernel.name == "android" then "libc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".libc."0.2.121" { inherit profileName; };
       ${ if !(hostPlatform.parsed.kernel.name == "linux" || hostPlatform.parsed.kernel.name == "android") then "parking_lot" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".parking_lot."0.11.2" { inherit profileName; };
       ${ if !(hostPlatform.parsed.kernel.name == "linux" || hostPlatform.parsed.kernel.name == "android") then "parking_lot_core" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".parking_lot_core."0.8.5" { inherit profileName; };
       static_init_macro = buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".static_init_macro."1.0.2" { profileName = "__noProfile"; };
@@ -5597,10 +5598,10 @@ in
     ];
     dependencies = {
       ${ if hostPlatform.config == "aarch64-uwp-windows-msvc" || hostPlatform.config == "aarch64-pc-windows-msvc" then "windows_aarch64_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_aarch64_msvc."0.32.0" { inherit profileName; };
-      ${ if hostPlatform.config == "i686-uwp-windows-gnu" || hostPlatform.config == "i686-pc-windows-gnu" then "windows_i686_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_i686_gnu."0.32.0" { inherit profileName; };
+      ${ if hostPlatform.config == "i686-pc-windows-gnu" || hostPlatform.config == "i686-uwp-windows-gnu" then "windows_i686_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_i686_gnu."0.32.0" { inherit profileName; };
-      ${ if hostPlatform.config == "i686-pc-windows-msvc" || hostPlatform.config == "i686-uwp-windows-msvc" then "windows_i686_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_i686_msvc."0.32.0" { inherit profileName; };
+      ${ if hostPlatform.config == "i686-uwp-windows-msvc" || hostPlatform.config == "i686-pc-windows-msvc" then "windows_i686_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_i686_msvc."0.32.0" { inherit profileName; };
-      ${ if hostPlatform.config == "x86_64-pc-windows-gnu" || hostPlatform.config == "x86_64-uwp-windows-gnu" then "windows_x86_64_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_x86_64_gnu."0.32.0" { inherit profileName; };
+      ${ if hostPlatform.config == "x86_64-uwp-windows-gnu" || hostPlatform.config == "x86_64-pc-windows-gnu" then "windows_x86_64_gnu" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_x86_64_gnu."0.32.0" { inherit profileName; };
-      ${ if hostPlatform.config == "x86_64-pc-windows-msvc" || hostPlatform.config == "x86_64-uwp-windows-msvc" then "windows_x86_64_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_x86_64_msvc."0.32.0" { inherit profileName; };
+      ${ if hostPlatform.config == "x86_64-uwp-windows-msvc" || hostPlatform.config == "x86_64-pc-windows-msvc" then "windows_x86_64_msvc" else null } = rustPackages."registry+https://github.com/rust-lang/crates.io-index".windows_x86_64_msvc."0.32.0" { inherit profileName; };
     };
   });
   

src/api/Cargo.toml

@@ -38,6 +38,7 @@ futures = "0.3"
 futures-util = "0.3"
 pin-project = "1.0"
 tokio = { version = "1.0", default-features = false, features = ["rt", "rt-multi-thread", "io-util", "net", "time", "macros", "sync", "signal", "fs"] }
+tokio-stream = "0.1"
 
 form_urlencoded = "1.0.0"
 http = "0.2"

src/api/s3/get.rs

@@ -2,16 +2,19 @@
 use std::sync::Arc;
 use std::time::{Duration, UNIX_EPOCH};
 
-use futures::stream::*;
+use futures::future;
+use futures::stream::{self, StreamExt};
 use http::header::{
 	ACCEPT_RANGES, CONTENT_LENGTH, CONTENT_RANGE, CONTENT_TYPE, ETAG, IF_MODIFIED_SINCE,
 	IF_NONE_MATCH, LAST_MODIFIED, RANGE,
 };
 use hyper::{Body, Request, Response, StatusCode};
+use tokio::sync::mpsc;
 
 use garage_rpc::rpc_helper::{netapp::stream::ByteStream, OrderTag};
 use garage_table::EmptyKey;
 use garage_util::data::*;
+use garage_util::error::OkOrMessage;
 
 use garage_model::garage::Garage;
 use garage_model::s3::object_table::*;
@@ -242,43 +245,56 @@ pub async fn handle_get(
 			Ok(resp_builder.body(body)?)
 		}
 		ObjectVersionData::FirstBlock(_, first_block_hash) => {
+			let (tx, rx) = mpsc::channel(2);
+
 			let order_stream = OrderTag::stream();
+			let first_block_hash = *first_block_hash;
+			let version_uuid = last_v.uuid;
 
-			let read_first_block = garage
+			tokio::spawn(async move {
+				match async {
+					let garage2 = garage.clone();
+					let version_fut = tokio::spawn(async move {
+						garage2.version_table.get(&version_uuid, &EmptyKey).await
+					});
+
+					let stream_block_0 = garage
 						.block_manager
-				.rpc_get_block_streaming(first_block_hash, Some(order_stream.order(0)));
+						.rpc_get_block_streaming(&first_block_hash, Some(order_stream.order(0)))
-			let get_next_blocks = garage.version_table.get(&last_v.uuid, &EmptyKey);
+						.await?;
-
+					tx.send(stream_block_0)
-			let (first_block_stream, version) =
-				futures::try_join!(read_first_block, get_next_blocks)?;
-			let version = version.ok_or(Error::NoSuchKey)?;
-
-			let mut blocks = version
-				.blocks
-				.items()
-				.iter()
-				.map(|(_, vb)| (vb.hash, None))
-				.collect::<Vec<_>>();
-			blocks[0].1 = Some(first_block_stream);
-
-			let body_stream = futures::stream::iter(blocks)
-				.enumerate()
-				.map(move |(i, (hash, stream_opt))| {
-					let garage = garage.clone();
-					async move {
-						if let Some(stream) = stream_opt {
-							stream
-						} else {
-							garage
-								.block_manager
-								.rpc_get_block_streaming(&hash, Some(order_stream.order(i as u64)))
 						.await
-								.unwrap_or_else(|e| error_stream(i, e))
+						.ok_or_message("channel closed")?;
+
+					let version = version_fut.await.unwrap()?.ok_or(Error::NoSuchKey)?;
+					for (i, (_, vb)) in version.blocks.items().iter().enumerate().skip(1) {
+						let stream_block_i = garage
+							.block_manager
+							.rpc_get_block_streaming(&vb.hash, Some(order_stream.order(i as u64)))
+							.await?;
+						tx.send(stream_block_i)
+							.await
+							.ok_or_message("channel closed")?;
+					}
+
+					Ok::<(), Error>(())
+				}
+				.await
+				{
+					Ok(()) => (),
+					Err(e) => {
+						let err = std::io::Error::new(
+							std::io::ErrorKind::Other,
+							format!("Error while getting object data: {}", e),
+						);
+						let _ = tx
+							.send(Box::pin(stream::once(future::ready(Err(err)))))
+							.await;
 					}
 				}
-				})
+			});
-				.buffered(2)
+
-				.flatten();
+			let body_stream = tokio_stream::wrappers::ReceiverStream::new(rx).flatten();
 
 			let body = hyper::body::Body::wrap_stream(body_stream);
 			Ok(resp_builder.body(body)?)