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fix crash and clean up record data size housekeeping

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This commit is contained in:
Christien Rioux 2023-09-09 13:30:48 -04:00
parent 36957d84f1
commit 853976789f
6 changed files with 103 additions and 48 deletions
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3
veilid-core/src/storage_manager/limited_size.rs
View File

@ -93,13 +93,14 @@ impl<T: PrimInt + Unsigned + fmt::Display + fmt::Debug> LimitedSize<T> {
}
}
log_stor!(debug "Commit ({}): {} => {}", self.description, self.value, uncommitted_value);
self.uncommitted_value = None;
self.value = uncommitted_value;
}
Ok(self.value)
}
pub fn rollback(&mut self) -> T {
if let Some(uv) = self.uncommitted_value {
if let Some(uv) = self.uncommitted_value.take() {
log_stor!(debug "Rollback ({}): {} (drop {})", self.description, self.value, uv);
}
return self.value;

130
veilid-core/src/storage_manager/record_store.rs
View File

@ -7,6 +7,21 @@
use super::*;
use hashlink::LruCache;
#[derive(Debug, Clone)]
/// A dead record that is yet to be purged from disk and statistics
struct DeadRecord<D>
where
D: fmt::Debug + Clone + Serialize + for<'d> Deserialize<'d>,
{
// The key used in the record_index
key: RecordTableKey,
// The actual record
record: Record<D>,
// True if this record is accounted for in the total storage
// and needs to have the statistics updated or not when purged
in_total_storage: bool,
}
pub struct RecordStore<D>
where
D: fmt::Debug + Clone + Serialize + for<'d> Deserialize<'d>,
@ -15,16 +30,24 @@ where
name: String,
limits: RecordStoreLimits,
/// The tabledb used for record data
record_table: Option<TableDB>,
/// The tabledb used for subkey data
subkey_table: Option<TableDB>,
/// The in-memory index that keeps track of what records are in the tabledb
record_index: LruCache<RecordTableKey, Record<D>>,
/// The in-memory cache of commonly accessed subkey data so we don't have to keep hitting the db
subkey_cache: LruCache<SubkeyTableKey, RecordData>,
/// Total storage space or subkey data inclusive of structures in memory
subkey_cache_total_size: LimitedSize<usize>,
/// Total storage space of records in the tabledb inclusive of subkey data and structures
total_storage_space: LimitedSize<u64>,
dead_records: Vec<(RecordTableKey, Record<D>)>,
/// Records to be removed from the tabledb upon next purge
dead_records: Vec<DeadRecord<D>>,
/// The list of records that have changed since last flush to disk (optimization for batched writes)
changed_records: HashSet<RecordTableKey>,
/// A mutex to ensure we handle this concurrently
purge_dead_records_mutex: Arc<AsyncMutex<()>>,
}
@ -97,33 +120,45 @@ where
// Sort the record index by last touched time and insert in sorted order
record_index_saved.sort_by(|a, b| a.1.last_touched().cmp(&b.1.last_touched()));
let mut dead_records = Vec::new();
let mut dead_records = Vec::<DeadRecord<D>>::new();
for ri in record_index_saved {
// total the storage space
self.total_storage_space
.add(mem::size_of::<RecordTableKey>() as u64)
.unwrap();
self.total_storage_space
.add(ri.1.total_size() as u64)
.add((mem::size_of::<RecordTableKey>() + ri.1.total_size()) as u64)
.unwrap();
if let Err(_) = self.total_storage_space.commit() {
// If we overflow the limit, kill off the record
dead_records.push((ri.0, ri.1));
// Revert the total storage space because the commit failed
self.total_storage_space.rollback();
// If we overflow the limit, kill off the record, noting that it has not yet been added to the total storage space
dead_records.push(DeadRecord {
key: ri.0,
record: ri.1,
in_total_storage: false,
});
continue;
}
// add to index and ensure we deduplicate in the case of an error
if let Some(v) = self.record_index.insert_with_callback(ri.0, ri.1, |k, v| {
// If the configuration change, we only want to keep the 'limits.max_records' records
dead_records.push((k, v));
dead_records.push(DeadRecord {
key: k,
record: v,
in_total_storage: true,
});
}) {
// This shouldn't happen, but deduplicate anyway
log_stor!(warn "duplicate record in table: {:?}", ri.0);
dead_records.push((ri.0, v));
dead_records.push(DeadRecord {
key: ri.0,
record: v,
in_total_storage: true,
});
}
}
for (k, v) in dead_records {
self.add_dead_record(k, v);
for dr in dead_records {
self.dead_records.push(dr);
}
self.record_table = Some(record_table);
@ -132,7 +167,11 @@ where
}
fn add_dead_record(&mut self, key: RecordTableKey, record: Record<D>) {
self.dead_records.push((key, record));
self.dead_records.push(DeadRecord {
key,
record,
in_total_storage: true,
});
}
fn mark_record_changed(&mut self, key: RecordTableKey) {
@ -208,23 +247,23 @@ where
let rt_xact = record_table.transact();
let st_xact = subkey_table.transact();
let dead_records = mem::take(&mut self.dead_records);
for (k, v) in dead_records {
for dr in dead_records {
// Record should already be gone from index
if self.record_index.contains_key(&k) {
log_stor!(error "dead record found in index: {:?}", k);
if self.record_index.contains_key(&dr.key) {
log_stor!(error "dead record found in index: {:?}", dr.key);
}
// Delete record
if let Err(e) = rt_xact.delete(0, &k.bytes()) {
if let Err(e) = rt_xact.delete(0, &dr.key.bytes()) {
log_stor!(error "record could not be deleted: {}", e);
}
// Delete subkeys
let stored_subkeys = v.stored_subkeys();
let stored_subkeys = dr.record.stored_subkeys();
for sk in stored_subkeys.iter() {
// From table
let stk = SubkeyTableKey {
key: k.key,
key: dr.key.key,
subkey: sk,
};
let stkb = stk.bytes();
@ -237,11 +276,12 @@ where
}
// Remove from total size
self.total_storage_space
.saturating_sub(mem::size_of::<RecordTableKey>() as u64);
self.total_storage_space
.saturating_sub(v.total_size() as u64);
self.total_storage_space.commit().unwrap();
if dr.in_total_storage {
self.total_storage_space.saturating_sub(
(mem::size_of::<RecordTableKey>() + dr.record.total_size()) as u64,
);
self.total_storage_space.commit().unwrap();
}
}
if let Err(e) = rt_xact.commit().await {
log_stor!(error "failed to commit record table transaction: {}", e);
@ -306,6 +346,9 @@ where
.await
.map_err(VeilidAPIError::internal)?;
// Update storage space (won't fail due to check_limit above)
self.total_storage_space.commit().unwrap();
// Save to record index
let mut dead_records = Vec::new();
if let Some(v) = self.record_index.insert_with_callback(rtk, record, |k, v| {
@ -319,9 +362,6 @@ where
self.add_dead_record(dr.0, dr.1);
}
// Update storage space
self.total_storage_space.commit().unwrap();
Ok(())
}
@ -407,7 +447,7 @@ where
subkey: ValueSubkey,
want_descriptor: bool,
) -> VeilidAPIResult<Option<SubkeyResult>> {
// record from index
// Get record from index
let Some((subkey_count, has_subkey, opt_descriptor)) = self.with_record(key, |record| {
(record.subkey_count(), record.stored_subkeys().contains(subkey), if want_descriptor {
Some(record.descriptor().clone())
@ -545,9 +585,9 @@ where
);
}
// Get record from index
let Some((subkey_count, total_size)) = self.with_record(key, |record| {
(record.subkey_count(), record.total_size())
// Get record subkey count and total size of all record subkey data exclusive of structures
let Some((subkey_count, prior_record_data_size)) = self.with_record(key, |record| {
(record.subkey_count(), record.record_data_size())
}) else {
apibail_invalid_argument!("no record at this key", "key", key);
};
@ -563,14 +603,14 @@ where
};
// Get the previous subkey and ensure we aren't going over the record size limit
let mut prior_record_data_size = 0usize;
let mut prior_subkey_size = 0usize;
// If subkey exists in subkey cache, use that
let stk = SubkeyTableKey { key, subkey };
let stk_bytes = stk.bytes();
if let Some(record_data) = self.subkey_cache.peek(&stk) {
prior_record_data_size = record_data.total_size();
prior_subkey_size = record_data.data_size();
} else {
// If not in cache, try to pull from table store
if let Some(record_data) = subkey_table
@ -578,26 +618,26 @@ where
.await
.map_err(VeilidAPIError::internal)?
{
prior_record_data_size = record_data.total_size();
prior_subkey_size = record_data.data_size();
}
}
// Make new record data
let record_data = RecordData::new(signed_value_data);
let subkey_record_data = RecordData::new(signed_value_data);
// Check new total record size
let new_record_data_size = record_data.total_size();
let new_total_size = total_size + new_record_data_size - prior_record_data_size;
if new_total_size > self.limits.max_record_total_size {
let new_subkey_size = subkey_record_data.data_size();
let new_record_data_size = prior_record_data_size - prior_subkey_size + new_subkey_size;
if new_record_data_size > self.limits.max_record_total_size {
apibail_generic!("dht record too large");
}
// Check new total storage space
self.total_storage_space
.sub(prior_record_data_size as u64)
.sub(prior_subkey_size as u64)
.unwrap();
self.total_storage_space
.add(new_record_data_size as u64)
.add(new_subkey_size as u64)
.unwrap();
if !self.total_storage_space.check_limit() {
apibail_try_again!();
@ -605,17 +645,17 @@ where
// Write subkey
subkey_table
.store_json(0, &stk_bytes, &record_data)
.store_json(0, &stk_bytes, &subkey_record_data)
.await
.map_err(VeilidAPIError::internal)?;
// Write to subkey cache
self.add_to_subkey_cache(stk, record_data);
self.add_to_subkey_cache(stk, subkey_record_data);
// Update record
self.with_record_mut(key, |record| {
record.store_subkey(subkey);
record.set_record_data_size(new_total_size);
record.set_record_data_size(new_record_data_size);
})
.expect("record should still be here");
@ -666,7 +706,7 @@ where
out += &format!("Total Storage Space: {}\n", self.total_storage_space.get());
out += &format!("Dead Records: {}\n", self.dead_records.len());
for dr in &self.dead_records {
out += &format!(" {}\n", dr.0.key.to_string());
out += &format!(" {}\n", dr.key.key.to_string());
}
out += &format!("Changed Records: {}\n", self.changed_records.len());
for cr in &self.changed_records {

4
veilid-core/src/storage_manager/types/record.rs
View File

@ -74,7 +74,9 @@ where
}
pub fn total_size(&self) -> usize {
mem::size_of::<Record<D>>() + self.descriptor.total_size() + self.record_data_size
(mem::size_of::<Self>() - mem::size_of::<SignedValueDescriptor>())
+ self.descriptor.total_size()
+ self.record_data_size
}
// pub fn detail(&self) -> &D {

6
veilid-core/src/storage_manager/types/record_data.rs
View File

@ -12,7 +12,11 @@ impl RecordData {
pub fn signed_value_data(&self) -> &SignedValueData {
&self.signed_value_data
}
pub fn data_size(&self) -> usize {
self.signed_value_data.data_size()
}
pub fn total_size(&self) -> usize {
mem::size_of::<RecordData>() + self.signed_value_data.value_data().data().len()
(mem::size_of::<Self>() - mem::size_of::<SignedValueData>())
+ self.signed_value_data.total_size()
}
}

4
veilid-core/src/storage_manager/types/signed_value_data.rs
View File

@ -56,6 +56,10 @@ impl SignedValueData {
&self.signature
}
pub fn data_size(&self) -> usize {
self.value_data.data_size()
}
pub fn total_size(&self) -> usize {
(mem::size_of::<Self>() - mem::size_of::<ValueData>()) + self.value_data.total_size()
}

4
veilid-core/src/veilid_api/types/dht/value_data.rs
View File

@ -56,6 +56,10 @@ impl ValueData {
&self.data
}
pub fn data_size(&self) -> usize {
self.data.len()
}
pub fn total_size(&self) -> usize {
mem::size_of::<Self>() + self.data.len()
}