Only serialize rooted append vecs

core/tests/bank_forks.rs

@@ -237,7 +237,7 @@ mod tests {
             let key1 = Keypair::new().pubkey();
             let tx = system_transaction::transfer(&mint_keypair, &key1, 1, genesis_config.hash());
             assert_eq!(bank.process_transaction(&tx), Ok(()));
-            bank.freeze();
+            bank.squash();
             bank_forks.insert(bank);
 
             let package_sender = {

ledger/src/snapshot_utils.rs

@@ -86,7 +86,7 @@ pub fn package_snapshot<P: AsRef<Path>, Q: AsRef<Path>>(
     // Get a reference to all the relevant AccountStorageEntries
     let account_storage_entries: Vec<_> = bank
         .rc
-        .get_storage_entries()
+        .get_rooted_storage_entries()
         .into_iter()
         .filter(|x| x.slot_id() <= bank.slot())
         .collect();

runtime/src/accounts_db.rs

@@ -487,13 +487,21 @@ impl AccountsDB {
                         append_vecs_path.as_ref().join(&append_vec_relative_path);
                     let mut copy_options = CopyOptions::new();
                     copy_options.overwrite = true;
-                    fs_extra::move_items(&vec![&append_vec_abs_path], &local_dir, &copy_options)
-                        .map_err(|e| {
-                            AccountsDB::get_io_error(&format!(
-                                "Unable to move {:?} to {:?}: {}",
-                                append_vec_abs_path, local_dir, e
-                            ))
-                        })?;
+                    let e = fs_extra::move_items(
+                        &vec![&append_vec_abs_path],
+                        &local_dir,
+                        &copy_options,
+                    )
+                    .map_err(|e| {
+                        AccountsDB::get_io_error(&format!(
+                            "Unable to move {:?} to {:?}: {}",
+                            append_vec_abs_path, local_dir, e
+                        ))
+                    });
+                    if e.is_err() {
+                        info!("{:?}", e);
+                        continue;
+                    }
 
                     // Notify the AppendVec of the new file location
                     let local_path = local_dir.join(append_vec_relative_path);
@@ -508,7 +516,13 @@ impl AccountsDB {
             .collect();
 
         let new_storage_map = new_storage_map?;
-        let storage = AccountStorage(new_storage_map);
+        let mut storage = AccountStorage(new_storage_map);
+
+        // discard any slots with no storage entries
+        // this can happen if a non-root slot was serialized
+        // but non-root stores should not be included in the snapshot
+        storage.0.retain(|_slot_id, stores| !stores.is_empty());
+
         let version: u64 = deserialize_from(&mut stream)
             .map_err(|_| AccountsDB::get_io_error("write version deserialize error"))?;
 
@@ -1095,12 +1109,14 @@ impl AccountsDB {
         self.accounts_index.write().unwrap().add_root(slot)
     }
 
-    pub fn get_storage_entries(&self) -> Vec<Arc<AccountStorageEntry>> {
+    pub fn get_rooted_storage_entries(&self) -> Vec<Arc<AccountStorageEntry>> {
+        let accounts_index = self.accounts_index.read().unwrap();
         let r_storage = self.storage.read().unwrap();
         r_storage
             .0
             .values()
             .flat_map(|slot_store| slot_store.values().cloned())
+            .filter(|store| accounts_index.is_root(store.slot_id))
             .collect()
     }
 
@@ -2094,7 +2110,7 @@ pub mod tests {
         accounts_db: &AccountsDB,
         output_dir: P,
     ) -> IOResult<()> {
-        let storage_entries = accounts_db.get_storage_entries();
+        let storage_entries = accounts_db.get_rooted_storage_entries();
         for storage in storage_entries {
             let storage_path = storage.get_path();
             let output_path = output_dir.as_ref().join(

runtime/src/bank.rs

@@ -96,8 +96,8 @@ impl BankRc {
         Ok(())
     }
 
-    pub fn get_storage_entries(&self) -> Vec<Arc<AccountStorageEntry>> {
-        self.accounts.accounts_db.get_storage_entries()
+    pub fn get_rooted_storage_entries(&self) -> Vec<Arc<AccountStorageEntry>> {
+        self.accounts.accounts_db.get_rooted_storage_entries()
     }
 
     fn get_io_error(error: &str) -> IOError {
@@ -3635,44 +3635,54 @@ mod tests {
 
     #[test]
     fn test_bank_serialize() {
+        solana_logger::setup();
         let (genesis_config, _) = create_genesis_config(500);
         let bank0 = Arc::new(Bank::new(&genesis_config));
-        let bank = new_from_parent(&bank0);
+        let bank1 = Bank::new_from_parent(&bank0, &Pubkey::default(), 1);
+        bank0.squash();
 
-        // Test new account
-        let key = Keypair::new();
-        bank.deposit(&key.pubkey(), 10);
-        assert_eq!(bank.get_balance(&key.pubkey()), 10);
+        // Create an account on a non-root fork
+        let key1 = Keypair::new();
+        bank1.deposit(&key1.pubkey(), 5);
+
+        let bank2 = Bank::new_from_parent(&bank0, &Pubkey::default(), 2);
 
+        // Test new account
         let key2 = Keypair::new();
-        bank.deposit(&key2.pubkey(), 0);
+        bank2.deposit(&key2.pubkey(), 10);
+        assert_eq!(bank2.get_balance(&key2.pubkey()), 10);
 
-        let len = serialized_size(&bank).unwrap() + serialized_size(&bank.rc).unwrap();
+        let key3 = Keypair::new();
+        bank2.deposit(&key3.pubkey(), 0);
+
+        bank2.squash();
+
+        let len = serialized_size(&bank2).unwrap() + serialized_size(&bank2.rc).unwrap();
         let mut buf = vec![0u8; len as usize];
         let mut writer = Cursor::new(&mut buf[..]);
-        serialize_into(&mut writer, &bank).unwrap();
-        serialize_into(&mut writer, &bank.rc).unwrap();
+        serialize_into(&mut writer, &bank2).unwrap();
+        serialize_into(&mut writer, &bank2.rc).unwrap();
 
         let mut rdr = Cursor::new(&buf[..]);
         let mut dbank: Bank = deserialize_from(&mut rdr).unwrap();
         let mut reader = BufReader::new(&buf[rdr.position() as usize..]);
 
         // Create a new set of directories for this bank's accounts
         let (_accounts_dir, dbank_paths) = get_temp_accounts_paths(4).unwrap();
-        dbank.set_bank_rc(
-            &BankRc::new(dbank_paths.clone(), 0, dbank.slot()),
-            &StatusCacheRc::default(),
-        );
+        let ref_sc = StatusCacheRc::default();
+        ref_sc.status_cache.write().unwrap().add_root(2);
+        dbank.set_bank_rc(&BankRc::new(dbank_paths.clone(), 0, dbank.slot()), &ref_sc);
         // Create a directory to simulate AppendVecs unpackaged from a snapshot tar
         let copied_accounts = TempDir::new().unwrap();
-        copy_append_vecs(&bank.rc.accounts.accounts_db, copied_accounts.path()).unwrap();
+        copy_append_vecs(&bank2.rc.accounts.accounts_db, copied_accounts.path()).unwrap();
         dbank
             .rc
             .accounts_from_stream(&mut reader, dbank_paths, copied_accounts.path())
             .unwrap();
-        assert_eq!(dbank.get_balance(&key.pubkey()), 10);
-        assert_eq!(dbank.get_balance(&key2.pubkey()), 0);
-        bank.compare_bank(&dbank);
+        assert_eq!(dbank.get_balance(&key1.pubkey()), 0);
+        assert_eq!(dbank.get_balance(&key2.pubkey()), 10);
+        assert_eq!(dbank.get_balance(&key3.pubkey()), 0);
+        bank2.compare_bank(&dbank);
     }
 
     #[test]