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use crate::engine::RocksEngine;
use crate::util;
use engine_traits::{CFNamesExt, CompactExt, Result};
use rocksdb::{CompactOptions, CompactionOptions, DBCompressionType};
use std::cmp;
impl CompactExt for RocksEngine {
type CompactedEvent = crate::compact_listener::RocksCompactedEvent;
fn auto_compactions_is_disabled(&self) -> Result<bool> {
for cf_name in self.cf_names() {
let cf = util::get_cf_handle(self.as_inner(), cf_name)?;
if self
.as_inner()
.get_options_cf(cf)
.get_disable_auto_compactions()
{
return Ok(true);
}
}
Ok(false)
}
fn compact_range(
&self,
cf: &str,
start_key: Option<&[u8]>,
end_key: Option<&[u8]>,
exclusive_manual: bool,
max_subcompactions: u32,
) -> Result<()> {
let db = self.as_inner();
let handle = util::get_cf_handle(db, cf)?;
let mut compact_opts = CompactOptions::new();
compact_opts.set_exclusive_manual_compaction(exclusive_manual);
compact_opts.set_max_subcompactions(max_subcompactions as i32);
db.compact_range_cf_opt(handle, &compact_opts, start_key, end_key);
Ok(())
}
fn compact_files_in_range(
&self,
start: Option<&[u8]>,
end: Option<&[u8]>,
output_level: Option<i32>,
) -> Result<()> {
for cf_name in self.cf_names() {
self.compact_files_in_range_cf(cf_name, start, end, output_level)?;
}
Ok(())
}
fn compact_files_in_range_cf(
&self,
cf: &str,
start: Option<&[u8]>,
end: Option<&[u8]>,
output_level: Option<i32>,
) -> Result<()> {
let db = self.as_inner();
let handle = util::get_cf_handle(db, cf)?;
let cf_opts = db.get_options_cf(handle);
let output_level = output_level.unwrap_or(cf_opts.get_num_levels() as i32 - 1);
let mut input_files = Vec::new();
let cf_meta = db.get_column_family_meta_data(handle);
for (i, level) in cf_meta.get_levels().iter().enumerate() {
if i as i32 >= output_level {
break;
}
for f in level.get_files() {
if end.is_some() && end.unwrap() <= f.get_smallestkey() {
continue;
}
if start.is_some() && start.unwrap() > f.get_largestkey() {
continue;
}
input_files.push(f.get_name());
}
}
if input_files.is_empty() {
return Ok(());
}
self.compact_files_cf(
cf,
input_files,
Some(output_level),
cmp::min(num_cpus::get(), 32) as u32,
false,
)
}
fn compact_files_cf(
&self,
cf: &str,
mut files: Vec<String>,
output_level: Option<i32>,
max_subcompactions: u32,
exclude_l0: bool,
) -> Result<()> {
let db = self.as_inner();
let handle = util::get_cf_handle(db, cf)?;
let cf_opts = db.get_options_cf(handle);
let output_level = output_level.unwrap_or(cf_opts.get_num_levels() as i32 - 1);
let output_compression = cf_opts
.get_compression_per_level()
.get(output_level as usize)
.cloned()
.unwrap_or(DBCompressionType::No);
let output_file_size_limit = cf_opts.get_target_file_size_base() as usize;
if exclude_l0 {
let cf_meta = db.get_column_family_meta_data(handle);
let l0_files = cf_meta.get_levels()[0].get_files();
files.retain(|f| !l0_files.iter().any(|n| f.ends_with(&n.get_name())));
}
if files.is_empty() {
return Ok(());
}
let mut opts = CompactionOptions::new();
opts.set_compression(output_compression);
opts.set_max_subcompactions(max_subcompactions as i32);
opts.set_output_file_size_limit(output_file_size_limit);
db.compact_files_cf(handle, &opts, &files, output_level)?;
Ok(())
}
}
#[cfg(test)]
mod tests {
use crate::raw_util::{new_engine, CFOptions};
use crate::Compat;
use engine_traits::CompactExt;
use rocksdb::{ColumnFamilyOptions, Writable};
use std::sync::Arc;
use tempfile::Builder;
#[test]
fn test_compact_files_in_range() {
let temp_dir = Builder::new()
.prefix("test_compact_files_in_range")
.tempdir()
.unwrap();
let mut cf_opts = ColumnFamilyOptions::new();
cf_opts.set_disable_auto_compactions(true);
let cfs_opts = vec![
CFOptions::new("default", cf_opts.clone()),
CFOptions::new("test", cf_opts),
];
let db = new_engine(
temp_dir.path().to_str().unwrap(),
None,
&["default", "test"],
Some(cfs_opts),
)
.unwrap();
let db = Arc::new(db);
for cf_name in db.cf_names() {
let cf = db.cf_handle(cf_name).unwrap();
for i in 0..5 {
db.put_cf(cf, &[i], &[i]).unwrap();
db.put_cf(cf, &[i + 1], &[i + 1]).unwrap();
db.flush_cf(cf, true).unwrap();
}
let cf_meta = db.get_column_family_meta_data(cf);
let cf_levels = cf_meta.get_levels();
assert_eq!(cf_levels.first().unwrap().get_files().len(), 5);
}
db.c()
.compact_files_in_range(None, Some(&[4]), Some(1))
.unwrap();
for cf_name in db.cf_names() {
let cf = db.cf_handle(cf_name).unwrap();
let cf_meta = db.get_column_family_meta_data(cf);
let cf_levels = cf_meta.get_levels();
let level_0 = cf_levels[0].get_files();
assert_eq!(level_0.len(), 1);
assert_eq!(level_0[0].get_smallestkey(), &[4]);
assert_eq!(level_0[0].get_largestkey(), &[5]);
let level_1 = cf_levels[1].get_files();
assert_eq!(level_1.len(), 1);
assert_eq!(level_1[0].get_smallestkey(), &[0]);
assert_eq!(level_1[0].get_largestkey(), &[4]);
}
db.c()
.compact_files_in_range(Some(&[2]), Some(&[4]), None)
.unwrap();
for cf_name in db.cf_names() {
let cf = db.cf_handle(cf_name).unwrap();
let cf_opts = db.get_options_cf(cf);
let cf_meta = db.get_column_family_meta_data(cf);
let cf_levels = cf_meta.get_levels();
let level_0 = cf_levels[0].get_files();
assert_eq!(level_0.len(), 1);
assert_eq!(level_0[0].get_smallestkey(), &[4]);
assert_eq!(level_0[0].get_largestkey(), &[5]);
let level_n = cf_levels[cf_opts.get_num_levels() - 1].get_files();
assert_eq!(level_n.len(), 1);
assert_eq!(level_n[0].get_smallestkey(), &[0]);
assert_eq!(level_n[0].get_largestkey(), &[4]);
}
for cf_name in db.cf_names() {
let mut files = vec![];
let cf = db.cf_handle(cf_name).unwrap();
let cf_meta = db.get_column_family_meta_data(cf);
let cf_levels = cf_meta.get_levels();
for level in cf_levels.into_iter().rev() {
files.extend(level.get_files().iter().map(|f| f.get_name()));
}
assert_eq!(files.len(), 2);
db.c()
.compact_files_cf(cf_name, files.clone(), Some(3), 0, true)
.unwrap();
let cf_meta = db.get_column_family_meta_data(cf);
let cf_levels = cf_meta.get_levels();
assert_eq!(cf_levels[0].get_files().len(), 1);
assert_eq!(cf_levels[3].get_files().len(), 1);
}
}
}