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src/backup/backup_info.rs: improve prune algorithm

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This commit is contained in:
Dietmar Maurer 2019-12-05 08:55:19 +01:00
parent 0c875cf379
commit 2c034f8d0a
2 changed files with 57 additions and 20 deletions
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44
src/backup/backup_info.rs
View File

@ -3,7 +3,7 @@ use crate::tools;
use failure::*;
use regex::Regex;
use std::os::unix::io::RawFd;
use std::collections::HashSet;
use std::collections::{HashMap, HashSet};
use chrono::{DateTime, Datelike, TimeZone, SecondsFormat, Utc, Local};
@ -44,6 +44,8 @@ pub struct BackupGroup {
backup_id: String,
}
enum PruneMark { Keep, Remove }
impl BackupGroup {
pub fn new<T: Into<String>, U: Into<String>>(backup_type: T, backup_id: U) -> Self {
@ -102,20 +104,26 @@ impl BackupGroup {
}
fn mark_selections<F: Fn(DateTime<Local>, &BackupInfo) -> String> (
mark: &mut HashSet<PathBuf>,
mark: &mut HashMap<PathBuf, PruneMark>,
list: &Vec<BackupInfo>,
keep: usize,
select_id: F,
){
) {
let mut hash = HashSet::new();
for info in list {
let local_time = info.backup_dir.backup_time().with_timezone(&Local);
if hash.len() >= keep as usize { break; }
let backup_id = info.backup_dir.relative_path();
if let Some(_) = mark.get(&backup_id) {
continue;
}
let local_time = info.backup_dir.backup_time().with_timezone(&Local);
let sel_id: String = select_id(local_time, &info);
if !hash.contains(&sel_id) {
if hash.len() >= keep { break; }
hash.insert(sel_id);
mark.insert(backup_id);
mark.insert(backup_id, PruneMark::Keep);
} else {
mark.insert(backup_id, PruneMark::Remove);
}
}
}
@ -129,14 +137,17 @@ impl BackupGroup {
keep_yearly: Option<u64>,
) -> Result<Vec<BackupInfo>, Error> {
let mut mark = HashSet::new();
let mut mark = HashMap::new();
BackupInfo::sort_list(&mut list, false);
if let Some(keep_last) = keep_last {
list.iter().take(keep_last as usize).for_each(|info| {
mark.insert(info.backup_dir.relative_path());
});
for _ in 0..keep_last {
if list.is_empty() { break; }
let info = list.remove(0);
let backup_id = info.backup_dir.relative_path();
mark.insert(backup_id, PruneMark::Keep);
}
}
if let Some(keep_daily) = keep_daily {
@ -164,7 +175,14 @@ impl BackupGroup {
}
let mut remove_list: Vec<BackupInfo> = list.into_iter()
.filter(|info| !mark.contains(&info.backup_dir.relative_path())).collect();
.filter(|info| {
let backup_id = info.backup_dir.relative_path();
match mark.get(&backup_id) {
Some(PruneMark::Keep) => false,
_ => true,
}
})
.collect();
BackupInfo::sort_list(&mut remove_list, true);

33
tests/prune.rs
View File

@ -81,20 +81,16 @@ fn test_prune_simple() -> Result<(), Error> {
// keep-last, keep-daily mixed
let list = orig_list.clone();
let remove_list = get_prune_list(list, Some(2), Some(2), None, None, None);
let expect: Vec<PathBuf> = vec![
PathBuf::from("host/elsa/2019-12-02T11:59:15Z"),
];
let expect: Vec<PathBuf> = vec![];
assert_eq!(remove_list, expect);
// keep-daily test
let list = orig_list.clone();
let remove_list = get_prune_list(list, None, Some(3), None, None, None);
let expect: Vec<PathBuf> = vec![PathBuf::from("host/elsa/2019-12-04T11:59:15Z")];
assert_eq!(remove_list, expect);
// keep-daily test
let list = orig_list.clone();
let remove_list = get_prune_list(list, None, Some(2), None, None, None);
let expect: Vec<PathBuf> = vec![
@ -106,6 +102,7 @@ fn test_prune_simple() -> Result<(), Error> {
// keep-weekly
let list = orig_list.clone();
let remove_list = get_prune_list(list, None, None, Some(5), None, None);
// all backup are within the same week, so we only keep a single file
let expect: Vec<PathBuf> = vec![
PathBuf::from("host/elsa/2019-12-02T11:59:15Z"),
PathBuf::from("host/elsa/2019-12-03T11:59:15Z"),
@ -113,9 +110,19 @@ fn test_prune_simple() -> Result<(), Error> {
];
assert_eq!(remove_list, expect);
// keep-monthly
// keep-daily + keep-weekly
let list = orig_list.clone();
let remove_list = get_prune_list(list, None, Some(1), Some(5), None, None);
let expect: Vec<PathBuf> = vec![
PathBuf::from("host/elsa/2019-12-02T11:59:15Z"),
PathBuf::from("host/elsa/2019-12-04T11:59:15Z"),
];
assert_eq!(remove_list, expect);
// keep-monthly
let list = orig_list.clone();
let remove_list = get_prune_list(list, None, None, None, Some(6), None);
// all backup are within the same month, so we only keep a single file
let expect: Vec<PathBuf> = vec![
PathBuf::from("host/elsa/2019-12-02T11:59:15Z"),
PathBuf::from("host/elsa/2019-12-03T11:59:15Z"),
@ -123,9 +130,21 @@ fn test_prune_simple() -> Result<(), Error> {
];
assert_eq!(remove_list, expect);
// keep-yearly
// keep-yearly
let list = orig_list.clone();
let remove_list = get_prune_list(list, None, None, None, None, Some(7));
// all backup are within the same year, so we only keep a single file
let expect: Vec<PathBuf> = vec![
PathBuf::from("host/elsa/2019-12-02T11:59:15Z"),
PathBuf::from("host/elsa/2019-12-03T11:59:15Z"),
PathBuf::from("host/elsa/2019-12-04T11:59:15Z"),
];
assert_eq!(remove_list, expect);
// keep-weekly + keep-monthly + keep-yearly
let list = orig_list.clone();
let remove_list = get_prune_list(list, None, None, Some(5), Some(6), Some(7));
// all backup are within one week, so we only keep a single file
let expect: Vec<PathBuf> = vec![
PathBuf::from("host/elsa/2019-12-02T11:59:15Z"),
PathBuf::from("host/elsa/2019-12-03T11:59:15Z"),