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Merge pull request 'Refactoring of db engines' (#765) from factor-db-open into main

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Reviewed-on: Deuxfleurs/garage#765
This commit is contained in:
Alex 2024-03-08 12:56:40 +00:00
commit 238545e564
4 changed files with 183 additions and 183 deletions
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47
src/db/lib.rs
View file

@ -1,5 +1,4 @@
#[macro_use]
#[cfg(feature = "sqlite")]
extern crate tracing;
#[cfg(feature = "lmdb")]
@ -11,6 +10,8 @@ pub mod sqlite_adapter;
pub mod counted_tree_hack;
pub mod open;
#[cfg(test)]
pub mod test;
@ -22,6 +23,8 @@ use std::sync::Arc;
use err_derive::Error;
pub use open::*;
pub(crate) type OnCommit = Vec<Box<dyn FnOnce()>>;
#[derive(Clone)]
@ -171,48 +174,6 @@ impl Db {
}
}
/// List of supported database engine types
///
/// The `enum` holds list of *all* database engines that are are be supported by crate, no matter
/// if relevant feature is enabled or not. It allows us to distinguish between invalid engine
/// and valid engine, whose support is not enabled via feature flag.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Engine {
Lmdb,
Sqlite,
Sled,
}
impl Engine {
/// Return variant name as static `&str`
pub fn as_str(&self) -> &'static str {
match self {
Self::Lmdb => "lmdb",
Self::Sqlite => "sqlite",
Self::Sled => "sled",
}
}
}
impl std::fmt::Display for Engine {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
self.as_str().fmt(fmt)
}
}
impl std::str::FromStr for Engine {
type Err = Error;
fn from_str(text: &str) -> Result<Engine> {
match text {
"lmdb" | "heed" => Ok(Self::Lmdb),
"sqlite" | "sqlite3" | "rusqlite" => Ok(Self::Sqlite),
"sled" => Ok(Self::Sled),
kind => Err(Error(format!("Invalid DB engine: {}", kind).into())),
}
}
}
#[allow(clippy::len_without_is_empty)]
impl Tree {
#[inline]

153
src/db/open.rs Normal file
View file

@ -0,0 +1,153 @@
use std::path::PathBuf;
use crate::{Db, Error, Result};
/// List of supported database engine types
///
/// The `enum` holds list of *all* database engines that are are be supported by crate, no matter
/// if relevant feature is enabled or not. It allows us to distinguish between invalid engine
/// and valid engine, whose support is not enabled via feature flag.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Engine {
Lmdb,
Sqlite,
Sled,
}
impl Engine {
/// Return variant name as static `&str`
pub fn as_str(&self) -> &'static str {
match self {
Self::Lmdb => "lmdb",
Self::Sqlite => "sqlite",
Self::Sled => "sled",
}
}
}
impl std::fmt::Display for Engine {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
self.as_str().fmt(fmt)
}
}
impl std::str::FromStr for Engine {
type Err = Error;
fn from_str(text: &str) -> Result<Engine> {
match text {
"lmdb" | "heed" => Ok(Self::Lmdb),
"sqlite" | "sqlite3" | "rusqlite" => Ok(Self::Sqlite),
"sled" => Ok(Self::Sled),
kind => Err(Error(
format!(
"Invalid DB engine: {} (options are: lmdb, sled, sqlite)",
kind
)
.into(),
)),
}
}
}
pub struct OpenOpt {
pub fsync: bool,
pub lmdb_map_size: Option<usize>,
pub sled_cache_capacity: usize,
pub sled_flush_every_ms: u64,
}
impl Default for OpenOpt {
fn default() -> Self {
Self {
fsync: false,
lmdb_map_size: None,
sled_cache_capacity: 1024 * 1024 * 1024,
sled_flush_every_ms: 2000,
}
}
}
pub fn open_db(path: &PathBuf, engine: Engine, opt: &OpenOpt) -> Result<Db> {
match engine {
// ---- Sled DB ----
#[cfg(feature = "sled")]
Engine::Sled => {
if opt.fsync {
return Err(Error(
"`metadata_fsync = true` is not supported with the Sled database engine".into(),
));
}
info!("Opening Sled database at: {}", path.display());
let db = crate::sled_adapter::sled::Config::default()
.path(&path)
.cache_capacity(opt.sled_cache_capacity as u64)
.flush_every_ms(Some(opt.sled_flush_every_ms))
.open()?;
Ok(crate::sled_adapter::SledDb::init(db))
}
// ---- Sqlite DB ----
#[cfg(feature = "sqlite")]
Engine::Sqlite => {
info!("Opening Sqlite database at: {}", path.display());
let db = crate::sqlite_adapter::rusqlite::Connection::open(&path)?;
db.pragma_update(None, "journal_mode", "WAL")?;
if opt.fsync {
db.pragma_update(None, "synchronous", "NORMAL")?;
} else {
db.pragma_update(None, "synchronous", "OFF")?;
}
Ok(crate::sqlite_adapter::SqliteDb::init(db))
}
// ---- LMDB DB ----
#[cfg(feature = "lmdb")]
Engine::Lmdb => {
info!("Opening LMDB database at: {}", path.display());
if let Err(e) = std::fs::create_dir_all(&path) {
return Err(Error(
format!("Unable to create LMDB data directory: {}", e).into(),
));
}
let map_size = match opt.lmdb_map_size {
None => crate::lmdb_adapter::recommended_map_size(),
Some(v) => v - (v % 4096),
};
let mut env_builder = heed::EnvOpenOptions::new();
env_builder.max_dbs(100);
env_builder.map_size(map_size);
env_builder.max_readers(2048);
unsafe {
env_builder.flag(crate::lmdb_adapter::heed::flags::Flags::MdbNoMetaSync);
if !opt.fsync {
env_builder.flag(heed::flags::Flags::MdbNoSync);
}
}
match env_builder.open(&path) {
Err(heed::Error::Io(e)) if e.kind() == std::io::ErrorKind::OutOfMemory => {
return Err(Error(
"OutOfMemory error while trying to open LMDB database. This can happen \
if your operating system is not allowing you to use sufficient virtual \
memory address space. Please check that no limit is set (ulimit -v). \
You may also try to set a smaller `lmdb_map_size` configuration parameter. \
On 32-bit machines, you should probably switch to another database engine."
.into(),
))
}
Err(e) => Err(Error(format!("Cannot open LMDB database: {}", e).into())),
Ok(db) => Ok(crate::lmdb_adapter::LmdbDb::init(db)),
}
}
// Pattern is unreachable when all supported DB engines are compiled into binary. The allow
// attribute is added so that we won't have to change this match in case stop building
// support for one or more engines by default.
#[allow(unreachable_patterns)]
engine => Err(Error(
format!("DB engine support not available in this build: {}", engine).into(),
)),
}
}

54
src/garage/cli/convert_db.rs
View file

@ -51,53 +51,13 @@ pub(crate) fn do_conversion(args: ConvertDbOpt) -> Result<()> {
return Err(Error("input and output database engine must differ".into()));
}
let input = open_db(args.input_path, args.input_engine, &args.db_open)?;
let output = open_db(args.output_path, args.output_engine, &args.db_open)?;
let opt = OpenOpt {
lmdb_map_size: args.db_open.lmdb.map_size.map(|x| x.as_u64() as usize),
..Default::default()
};
let input = open_db(&args.input_path, args.input_engine, &opt)?;
let output = open_db(&args.output_path, args.output_engine, &opt)?;
output.import(&input)?;
Ok(())
}
fn open_db(path: PathBuf, engine: Engine, open: &OpenDbOpt) -> Result<Db> {
match engine {
#[cfg(feature = "sled")]
Engine::Sled => {
let db = sled_adapter::sled::Config::default().path(&path).open()?;
Ok(sled_adapter::SledDb::init(db))
}
#[cfg(feature = "sqlite")]
Engine::Sqlite => {
let db = sqlite_adapter::rusqlite::Connection::open(&path)?;
db.pragma_update(None, "journal_mode", "WAL")?;
db.pragma_update(None, "synchronous", "NORMAL")?;
Ok(sqlite_adapter::SqliteDb::init(db))
}
#[cfg(feature = "lmdb")]
Engine::Lmdb => {
std::fs::create_dir_all(&path).map_err(|e| {
Error(format!("Unable to create LMDB data directory: {}", e).into())
})?;
let map_size = match open.lmdb.map_size {
Some(c) => c.as_u64() as usize,
None => lmdb_adapter::recommended_map_size(),
};
let mut env_builder = lmdb_adapter::heed::EnvOpenOptions::new();
env_builder.max_dbs(100);
env_builder.map_size(map_size);
unsafe {
env_builder.flag(lmdb_adapter::heed::flags::Flags::MdbNoMetaSync);
}
let db = env_builder.open(&path)?;
Ok(lmdb_adapter::LmdbDb::init(db))
}
// Pattern is unreachable when all supported DB engines are compiled into binary. The allow
// attribute is added so that we won't have to change this match in case stop building
// support for one or more engines by default.
#[allow(unreachable_patterns)]
engine => Err(Error(
format!("Engine support not available in this build: {}", engine).into(),
)),
}
}

112
src/model/garage.rs
View file

@ -1,3 +1,4 @@
use std::str::FromStr;
use std::sync::Arc;
use garage_net::NetworkKey;
@ -113,108 +114,33 @@ impl Garage {
}
info!("Opening database...");
let db_engine = db::Engine::from_str(&config.db_engine)
.ok_or_message("Invalid `db_engine` value in configuration file")?;
let mut db_path = config.metadata_dir.clone();
let db = match config.db_engine.as_str() {
// ---- Sled DB ----
#[cfg(feature = "sled")]
"sled" => {
if config.metadata_fsync {
return Err(Error::Message(format!(
"`metadata_fsync = true` is not supported with the Sled database engine"
)));
}
match db_engine {
db::Engine::Sled => {
db_path.push("db");
info!("Opening Sled database at: {}", db_path.display());
let db = db::sled_adapter::sled::Config::default()
.path(&db_path)
.cache_capacity(config.sled_cache_capacity as u64)
.flush_every_ms(Some(config.sled_flush_every_ms))
.open()
.ok_or_message("Unable to open sled DB")?;
db::sled_adapter::SledDb::init(db)
}
#[cfg(not(feature = "sled"))]
"sled" => return Err(Error::Message("sled db not available in this build".into())),
// ---- Sqlite DB ----
#[cfg(feature = "sqlite")]
"sqlite" | "sqlite3" | "rusqlite" => {
db::Engine::Sqlite => {
db_path.push("db.sqlite");
info!("Opening Sqlite database at: {}", db_path.display());
let db = db::sqlite_adapter::rusqlite::Connection::open(db_path)
.and_then(|db| {
db.pragma_update(None, "journal_mode", &"WAL")?;
if config.metadata_fsync {
db.pragma_update(None, "synchronous", &"NORMAL")?;
} else {
db.pragma_update(None, "synchronous", &"OFF")?;
}
Ok(db)
})
.ok_or_message("Unable to open sqlite DB")?;
db::sqlite_adapter::SqliteDb::init(db)
}
#[cfg(not(feature = "sqlite"))]
"sqlite" | "sqlite3" | "rusqlite" => {
return Err(Error::Message(
"sqlite db not available in this build".into(),
))
}
// ---- LMDB DB ----
#[cfg(feature = "lmdb")]
"lmdb" | "heed" => {
db::Engine::Lmdb => {
db_path.push("db.lmdb");
info!("Opening LMDB database at: {}", db_path.display());
std::fs::create_dir_all(&db_path)
.ok_or_message("Unable to create LMDB data directory")?;
let map_size = match config.lmdb_map_size {
v if v == usize::default() => garage_db::lmdb_adapter::recommended_map_size(),
v => v - (v % 4096),
};
use db::lmdb_adapter::heed;
let mut env_builder = heed::EnvOpenOptions::new();
env_builder.max_dbs(100);
env_builder.max_readers(500);
env_builder.map_size(map_size);
unsafe {
env_builder.flag(heed::flags::Flags::MdbNoMetaSync);
if !config.metadata_fsync {
env_builder.flag(heed::flags::Flags::MdbNoSync);
}
}
let db = match env_builder.open(&db_path) {
Err(heed::Error::Io(e)) if e.kind() == std::io::ErrorKind::OutOfMemory => {
return Err(Error::Message(
"OutOfMemory error while trying to open LMDB database. This can happen \
if your operating system is not allowing you to use sufficient virtual \
memory address space. Please check that no limit is set (ulimit -v). \
You may also try to set a smaller `lmdb_map_size` configuration parameter. \
On 32-bit machines, you should probably switch to another database engine.".into()))
}
x => x.ok_or_message("Unable to open LMDB DB")?,
};
db::lmdb_adapter::LmdbDb::init(db)
}
#[cfg(not(feature = "lmdb"))]
"lmdb" | "heed" => return Err(Error::Message("lmdb db not available in this build".into())),
// ---- Unavailable DB engine ----
e => {
return Err(Error::Message(format!(
"Unsupported DB engine: {} (options: {})",
e,
vec![
#[cfg(feature = "sled")]
"sled",
#[cfg(feature = "sqlite")]
"sqlite",
#[cfg(feature = "lmdb")]
"lmdb",
]
.join(", ")
)));
}
}
let db_opt = db::OpenOpt {
fsync: config.metadata_fsync,
lmdb_map_size: match config.lmdb_map_size {
v if v == usize::default() => None,
v => Some(v),
},
sled_cache_capacity: config.sled_cache_capacity,
sled_flush_every_ms: config.sled_flush_every_ms,
};
let db = db::open_db(&db_path, db_engine, &db_opt)
.ok_or_message("Unable to open metadata db")?;
info!("Initializing RPC...");
let network_key = hex::decode(config.rpc_secret.as_ref().ok_or_message(
"rpc_secret value is missing, not present in config file or in environment",
)?)