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Do not keep oldest full snapshot

This commit is contained in:
Michael Vines 2022-02-20 08:06:23 -07:00
parent d0d256ee9a
commit 72c68695b5
1 changed files with 24 additions and 22 deletions
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46
runtime/src/snapshot_utils.rs
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@ -1259,9 +1259,7 @@ pub fn purge_old_snapshot_archives<P>(
let mut snapshot_archives = get_full_snapshot_archives(&snapshot_archives_dir);
snapshot_archives.sort_unstable();
snapshot_archives.reverse();
// Keep the oldest snapshot so we can always play the ledger from it.
snapshot_archives.pop();
let max_snaps = max(1, maximum_full_snapshot_archives_to_retain);
let max_snaps = max(1, maximum_full_snapshot_archives_to_retain); // Always keep at least one snapshot
for old_archive in snapshot_archives.into_iter().skip(max_snaps) {
trace!(
"Purging old full snapshot archive: {}",
@ -2427,20 +2425,24 @@ mod tests {
}
for snap_name in expected_snapshots {
assert!(retained_snaps.contains(snap_name.as_str()));
assert!(
retained_snaps.contains(snap_name.as_str()),
"{} not found",
snap_name
);
}
assert!(retained_snaps.len() == expected_snapshots.len());
}
#[test]
fn test_purge_old_full_snapshot_archives() {
// Create 3 snapshots, retaining 1,
// expecting the oldest 1 and the newest 1 are retained
let snap1_name = format!("snapshot-1-{}.tar.zst", Hash::default());
let snap2_name = format!("snapshot-3-{}.tar.zst", Hash::default());
let snap3_name = format!("snapshot-50-{}.tar.zst", Hash::default());
let snapshot_names = vec![&snap1_name, &snap2_name, &snap3_name];
let expected_snapshots = vec![&snap1_name, &snap3_name];
// expecting only the newest to be retained
let expected_snapshots = vec![&snap3_name];
common_test_purge_old_snapshot_archives(
&snapshot_names,
1,
@ -2448,7 +2450,7 @@ mod tests {
&expected_snapshots,
);
// retaining 0, the expectation is the same as for 1, as at least 1 newest is expected to be retained
// retaining 0, but minimum to retain is 1
common_test_purge_old_snapshot_archives(
&snapshot_names,
0,
@ -2456,14 +2458,23 @@ mod tests {
&expected_snapshots,
);
// retaining 2, all three should be retained
let expected_snapshots = vec![&snap1_name, &snap2_name, &snap3_name];
// retaiing 2, expecting the 2 newest to be retained
let expected_snapshots = vec![&snap2_name, &snap3_name];
common_test_purge_old_snapshot_archives(
&snapshot_names,
2,
DEFAULT_MAX_INCREMENTAL_SNAPSHOT_ARCHIVES_TO_RETAIN,
&expected_snapshots,
);
// retaining 3, all three should be retained
let expected_snapshots = vec![&snap1_name, &snap2_name, &snap3_name];
common_test_purge_old_snapshot_archives(
&snapshot_names,
3,
DEFAULT_MAX_INCREMENTAL_SNAPSHOT_ARCHIVES_TO_RETAIN,
&expected_snapshots,
);
}
/// Mimic a running node's behavior w.r.t. purging old snapshot archives. Take snapshots in a
@ -2500,18 +2511,9 @@ mod tests {
);
let mut full_snapshot_archives = get_full_snapshot_archives(&snapshot_archives_dir);
full_snapshot_archives.sort_unstable();
assert_eq!(
full_snapshot_archives.len(),
maximum_snapshots_to_retain + 1
);
assert_eq!(
full_snapshot_archives.first().unwrap().slot(),
starting_slot
);
assert_eq!(full_snapshot_archives.len(), maximum_snapshots_to_retain,);
assert_eq!(full_snapshot_archives.last().unwrap().slot(), slot);
for (i, full_snapshot_archive) in
full_snapshot_archives.iter().skip(1).rev().enumerate()
{
for (i, full_snapshot_archive) in full_snapshot_archives.iter().rev().enumerate() {
assert_eq!(full_snapshot_archive.slot(), slot - i as Slot);
}
}
@ -2572,7 +2574,7 @@ mod tests {
get_full_snapshot_archives(snapshot_archives_dir.path());
assert_eq!(
remaining_full_snapshot_archives.len(),
maximum_full_snapshot_archives_to_retain + 1,
maximum_full_snapshot_archives_to_retain,
);
remaining_full_snapshot_archives.sort_unstable();