periodically save config in separate folders

core/src/bank_forks.rs

@@ -166,7 +166,7 @@ impl BankForks {
             for slot in diff.iter() {
                 if **slot > root {
                     let _ = self.add_snapshot(**slot, root);
-                } else if **slot > 0 {
+                } else {
                     BankForks::remove_snapshot(**slot, &self.snapshot_path);
                 }
             }

multinode-demo/fullnode.sh

@@ -410,8 +410,10 @@ while true; do
     (
       set -x
       $rsync -qvPr "${rsync_entrypoint_url:?}"/config/ledger "$SOLANA_RSYNC_CONFIG_DIR"
-      $rsync -vqPr "${rsync_entrypoint_url:?}"/config/snapshots "$SOLANA_RSYNC_CONFIG_DIR"
-      $rsync -vqPr "${rsync_entrypoint_url:?}"/config/accounts "$SOLANA_RSYNC_CONFIG_DIR"
+      $rsync -qvPr "${rsync_entrypoint_url:?}"/config/snapshot_dir "$SOLANA_RSYNC_CONFIG_DIR"
+      current_snapshot_dir=$(cat "$SOLANA_RSYNC_CONFIG_DIR"/snapshot_dir)
+      $rsync -vqPr "${rsync_entrypoint_url:?}"/config/"$current_snapshot_dir"/snapshots "$SOLANA_RSYNC_CONFIG_DIR"
+      $rsync -vqPr "${rsync_entrypoint_url:?}"/config/"$current_snapshot_dir"/accounts "$SOLANA_RSYNC_CONFIG_DIR"
     ) || true
   fi
 
@@ -470,6 +472,7 @@ while true; do
   fi
 
   if [[ $node_type = bootstrap_leader ]]; then
+    snapshot_dir=0
     secs_to_next_sync_poll=30
     while true; do
       if ! kill -0 "$pid"; then
@@ -482,11 +485,15 @@ while true; do
       ((secs_to_next_sync_poll--)) && continue
       (
         if [[ -d $snapshot_config_dir ]]; then
-          $rsync -qrt --delete-after "$snapshot_config_dir"/ "$SOLANA_RSYNC_CONFIG_DIR"/snapshots
-          $rsync -qrt --delete-after "$accounts_config_dir"/ "$SOLANA_RSYNC_CONFIG_DIR"/accounts
+          current_config_dir="$SOLANA_RSYNC_CONFIG_DIR"/$snapshot_dir
+          mkdir -p "$current_config_dir"
+          cp -a "$snapshot_config_dir"/ "$current_config_dir"/snapshots
+          cp -a "$accounts_config_dir"/ "$current_config_dir"/accounts
+          echo $snapshot_dir > "$SOLANA_RSYNC_CONFIG_DIR"/snapshot_dir
 	fi
       ) || true
       secs_to_next_sync_poll=60
+      snapshot_dir=$((snapshot_dir+1))
     done
   else
     secs_to_next_genesis_poll=1

runtime/src/accounts.rs

@@ -22,7 +22,6 @@ use std::collections::{HashMap, HashSet};
 use std::env;
 use std::fs::remove_dir_all;
 use std::io::{BufReader, Read};
-use std::iter::once;
 use std::ops::Neg;
 use std::path::Path;
 use std::sync::atomic::{AtomicUsize, Ordering};

runtime/src/accounts_db.rs

@@ -39,7 +39,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::{Arc, RwLock};
 use sys_info;
 
-const ACCOUNT_DATA_FILE_SIZE: u64 = 64 * 1024 * 1024;
+const ACCOUNT_DATA_FILE_SIZE: u64 = 16 * 1024 * 1024;
 const ACCOUNT_DATA_FILE: &str = "data";
 pub const NUM_THREADS: u32 = 10;
 
@@ -340,8 +340,9 @@ impl AccountsDB {
             let union = index.roots.union(&accounts_index.roots);
             index.roots = union.cloned().collect();
             index.last_root = accounts_index.last_root;
+            let mut stores = self.storage.write().unwrap();
+            stores.0.extend(storage.0);
         }
-        *self.storage.write().unwrap() = storage;
         self.next_id
             .store(ids[ids.len() - 1] + 1, Ordering::Relaxed);
         self.write_version.store(version, Ordering::Relaxed);

runtime/src/bank.rs

@@ -4,7 +4,7 @@
 //! already been signed and verified.
 use crate::accounts::Accounts;
 use crate::accounts_db::{
-    AccountsDB, ErrorCounters, InstructionAccounts, InstructionCredits, InstructionLoaders,
+    ErrorCounters, InstructionAccounts, InstructionCredits, InstructionLoaders,
 };
 use crate::accounts_index::Fork;
 use crate::blockhash_queue::BlockhashQueue;