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Update pageserver/src/tenant/timeline.rs

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Co-authored-by: Joonas Koivunen <joonas@neon.tech>
This commit is contained in:
Konstantin Knizhnik
2023-05-16 21:18:20 +03:00
co-authored by Joonas Koivunen
parent 0785d92577
commit 2d015a1464
1 changed files with 26 additions and 29 deletions
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pageserver/src/tenant/timeline.rs
+26 -29
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@@ -3837,44 +3837,41 @@ impl Timeline {
// delta layers. Image layers can form "stairs" preventing old image from been deleted.
// But image layers are in any case less sparse than delta layers. Also we need some
// protection from replacing recent image layers with new one after each GC iteration.
if l.is_incremental() {
if l.is_incremental() && !LayerMap::is_l0(&*l) {
let mut to_remove: Vec<Key> = Vec::new();
let mut insert_new_range = true;
let start = l.get_key_range().start;
let mut end = l.get_key_range().end;
if !LayerMap::is_l0(&*l) {
// check if this range overlaps with exited ranges
let mut iter = wanted_image_layers.range_mut(..end);
while let Some((prev_start, prev_end)) = iter.next_back() {
if *prev_end >= start {
// two ranges overlap
if *prev_start <= start {
// combine with prev range
insert_new_range = false;
if *prev_end < end {
// extend prev range
*prev_end = end;
info!("Extend wanted image {}..{}", *prev_start, end);
}
break;
} else {
to_remove.push(*prev_start);
if *prev_end > end {
end = *prev_end;
}
// check if this range overlaps with existing ranges
let mut iter = wanted_image_layers.range_mut(..end);
while let Some((prev_start, prev_end)) = iter.next_back() {
if *prev_end >= start {
// two ranges overlap
if *prev_start <= start {
// combine with prev range
insert_new_range = false;
if *prev_end < end {
*prev_end = end;
info!("Extend wanted image {}..{}", *prev_start, end);
}
} else {
break;
} else {
to_remove.push(*prev_start);
if *prev_end > end {
end = *prev_end;
}
}
} else {
break;
}
for key in to_remove {
wanted_image_layers.remove(&key);
}
if insert_new_range {
info!("Wanted image {}..{}", start, end);
wanted_image_layers.insert(start, end);
}
}
for key in to_remove {
wanted_image_layers.remove(&key);
}
if insert_new_range {
info!("Wanted image {}..{}", start, end);
wanted_image_layers.insert(start, end);
}
}
result.layers_not_updated += 1;