move compactor logic to sqld wal-toolkit command

Author: MarinPostma

libsql-server/src/lib.rs

@@ -115,6 +115,7 @@ mod stats;
 #[cfg(test)]
 mod test;
 mod utils;
+pub mod wal_toolkit;
 
 const DB_CREATE_TIMEOUT: Duration = Duration::from_secs(1);
 const DEFAULT_AUTO_CHECKPOINT: u32 = 1000;

libsql-server/src/main.rs

@@ -8,6 +8,7 @@ use bytesize::ByteSize;
 use clap::Parser;
 use hyper::client::HttpConnector;
 use libsql_server::auth::{parse_http_basic_auth_arg, parse_jwt_keys, user_auth_strategies, Auth};
+use libsql_server::wal_toolkit::{S3Args, WalToolkit};
 use tokio::sync::Notify;
 use tokio::time::Duration;
 use tracing_subscriber::prelude::*;
@@ -316,6 +317,14 @@ enum UtilsSubcommands {
         #[clap(long)]
         auth: Option<String>,
     },
+    WalToolkit {
+        #[arg(long, short, default_value = ".compactor")]
+        path: PathBuf,
+        #[clap(flatten)]
+        s3_args: S3Args,
+        #[clap(subcommand)]
+        command: WalToolkit,
+    },
 }
 
 impl Cli {
@@ -731,6 +740,13 @@ async fn main() -> Result<()> {
                     client.run_namespace(ns).await?;
                 }
             }
+            UtilsSubcommands::WalToolkit {
+                command,
+                path,
+                s3_args,
+            } => {
+                command.run(path, s3_args).await?;
+            }
         }
 
         return Ok(());

libsql-server/src/wal_toolkit.rs

@@ -0,0 +1,212 @@
+use std::path::{Path, PathBuf};
+
+use anyhow::Context as _;
+use aws_config::{retry::RetryConfig, BehaviorVersion, Region};
+use aws_sdk_s3::config::{Credentials, SharedCredentialsProvider};
+use libsql_wal::io::StdIO;
+use libsql_wal::storage::backend::s3::S3Backend;
+use libsql_wal::storage::compaction::strategy::identity::IdentityStrategy;
+use libsql_wal::storage::compaction::strategy::log_strategy::LogReductionStrategy;
+use libsql_wal::storage::compaction::strategy::PartitionStrategy;
+use libsql_wal::storage::compaction::Compactor;
+
+#[derive(Clone, Debug, clap::ValueEnum)]
+pub enum CompactStrategy {
+    Logarithmic,
+    CompactAll,
+}
+
+#[derive(Debug, clap::Subcommand)]
+pub enum WalToolkit {
+    /// Register namespaces to monitor
+    Monitor { namespace: String },
+    /// Analyze segments for a namespaces
+    Analyze {
+        /// list all segments
+        #[clap(long)]
+        list_all: bool,
+        namespace: String,
+    },
+    /// Compact segments into bigger segments
+    Compact {
+        /// compaction strategy
+        #[clap(long, short)]
+        strategy: CompactStrategy,
+        /// prints the compaction plan, but doesn't perform it.
+        #[clap(long)]
+        dry_run: bool,
+        namespace: String,
+    },
+    /// Sync namespace metadata from remote storage
+    Sync {
+        /// When performing a full sync, all the segment space is scanned again. By default, only
+        /// segments with frame_no greated that the last frame_no are retrieved.
+        #[clap(long)]
+        full: bool,
+        /// unless this is specified, all monitored namespaces are synced
+        namespace: Option<String>,
+    },
+    /// Restore namespace
+    Restore {
+        #[clap(long)]
+        verify: bool,
+        namespace: String,
+        out: PathBuf,
+    },
+}
+
+impl WalToolkit {
+    pub async fn run(&self, compact_path: &Path, s3_args: &S3Args) -> anyhow::Result<()> {
+        let backend = setup_storage(s3_args).await?;
+        tokio::fs::create_dir_all(compact_path).await?;
+        let mut compactor = Compactor::new(backend.into(), compact_path)?;
+        match self {
+            Self::Monitor { namespace } => {
+                let namespace = libsql_sys::name::NamespaceName::from_string(namespace.to_string());
+                compactor.monitor(&namespace).await?;
+                println!("monitoring {namespace}");
+            }
+            Self::Analyze {
+                namespace,
+                list_all,
+            } => {
+                let namespace = libsql_sys::name::NamespaceName::from_string(namespace.to_string());
+                let analysis = compactor.analyze(&namespace)?;
+                println!("stats for {namespace}:");
+                println!("- segment count: {}", analysis.segment_count());
+                println!("- last frame_no: {}", analysis.last_frame_no());
+                let set = analysis.shortest_restore_path();
+                println!("- shortest restore path len: {}", set.len());
+                if let Some((first, last)) = compactor.get_segment_range(&namespace)? {
+                    println!(
+                        "- oldest segment: {}-{} ({})",
+                        first.key.start_frame_no, first.key.end_frame_no, first.created_at
+                    );
+                    println!(
+                        "- most recent segment: {}-{} ({})",
+                        last.key.start_frame_no, last.key.end_frame_no, last.created_at
+                    );
+                }
+
+                if *list_all {
+                    println!("segments:");
+                    compactor.list_all(&namespace, |info| {
+                        println!(
+                            "- {}-{} ({})",
+                            info.key.start_frame_no, info.key.end_frame_no, info.created_at
+                        );
+                    })?;
+                }
+            }
+            Self::Compact {
+                strategy,
+                dry_run,
+                namespace,
+            } => {
+                let namespace = libsql_sys::name::NamespaceName::from_string(namespace.to_string());
+                let analysis = compactor.analyze(&namespace)?;
+                let strat: Box<dyn PartitionStrategy> = match strategy {
+                    CompactStrategy::Logarithmic => Box::new(LogReductionStrategy),
+                    CompactStrategy::CompactAll => Box::new(IdentityStrategy),
+                };
+                let set = analysis.shortest_restore_path();
+                let partition = strat.partition(&set);
+
+                println!("initial shortest restore path len: {}", set.len());
+                println!("compacting into {} segments", partition.len());
+                for set in partition.iter() {
+                    println!("- {:?}", set.range().unwrap());
+                }
+                if *dry_run {
+                    println!("dry run: stopping");
+                } else {
+                    println!("performing compaction");
+                    let part_len = partition.len();
+                    for (idx, set) in partition.into_iter().enumerate() {
+                        let Some((start, end)) = set.range() else {
+                            continue;
+                        };
+                        println!("compacting {start}-{end} ({}/{})", idx + 1, part_len);
+                        // TODO: we can compact in conccurently
+                        compactor.compact(set).await?;
+                    }
+                }
+            }
+            Self::Sync { full, namespace } => match namespace {
+                Some(_ns) => {
+                    todo!()
+                }
+                None if *full => {
+                    compactor.sync_full().await?;
+                    println!("all monitored namespace fully up to date.");
+                }
+                _ => todo!(),
+            },
+            Self::Restore {
+                namespace,
+                out,
+                verify,
+            } => {
+                let namespace = libsql_sys::name::NamespaceName::from_string(namespace.to_string());
+                let analysis = compactor.analyze(&namespace)?;
+                let set = analysis.shortest_restore_path();
+                compactor.restore(set, &out).await?;
+                if *verify {
+                    let conn = libsql_sys::rusqlite::Connection::open(&out)?;
+                    conn.pragma_query(None, "integrity_check", |r| {
+                        println!("{r:?}");
+                        Ok(())
+                    })?;
+                }
+            }
+        }
+
+        Ok(())
+    }
+}
+
+async fn setup_storage(opt: &S3Args) -> anyhow::Result<S3Backend<StdIO>> {
+    let config = aws_config::load_defaults(BehaviorVersion::latest()).await;
+
+    let mut builder = config.into_builder();
+    builder.set_endpoint_url(opt.s3_url.clone());
+    builder.set_retry_config(RetryConfig::standard().with_max_attempts(10).into());
+    builder.set_region(Region::new(
+        opt.s3_region_id.clone().expect("expected aws region"),
+    ));
+    let cred = Credentials::new(
+        opt.s3_access_key_id.as_ref().unwrap(),
+        opt.s3_access_key.as_ref().unwrap(),
+        None,
+        None,
+        "Static",
+    );
+    builder.set_credentials_provider(Some(SharedCredentialsProvider::new(cred)));
+    let config = builder.build();
+    let backend = S3Backend::from_sdk_config(
+        config,
+        opt.s3_bucket.clone().context("missing bucket id")?,
+        opt.cluster_id.clone().context("missing cluster id")?,
+    )
+    .await?;
+
+    Ok(backend)
+}
+
+#[derive(Debug, clap::Args)]
+pub struct S3Args {
+    #[arg(long, requires = "S3Args")]
+    enable_s3: bool,
+    #[arg(long, env = "LIBSQL_BOTTOMLESS_DATABASE_ID")]
+    cluster_id: Option<String>,
+    #[arg(long, env = "LIBSQL_BOTTOMLESS_ENDPOINT")]
+    s3_url: Option<String>,
+    #[arg(long, env = "LIBSQL_BOTTOMLESS_AWS_SECRET_ACCESS_KEY")]
+    s3_access_key: Option<String>,
+    #[arg(long, env = "LIBSQL_BOTTOMLESS_AWS_ACCESS_KEY_ID")]
+    s3_access_key_id: Option<String>,
+    #[arg(long, env = "LIBSQL_BOTTOMLESS_BUCKET")]
+    s3_bucket: Option<String>,
+    #[arg(long, env = "LIBSQL_BOTTOMLESS_AWS_DEFAULT_REGION")]
+    s3_region_id: Option<String>,
+}