snapshots: serialize version file first (backport #27192) (#27203)

snapshots: serialize version file first (#27192) serialize version file first (cherry picked from commit c1111fa) Co-authored-by: apfitzge <[email protected]>
solana-labs · Aug 18, 2022 · 8a30642 · 8a30642
1 parent 1123d58
commit 8a30642
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/runtime/src/snapshot_utils.rs b/runtime/src/snapshot_utils.rs
@@ -344,10 +344,12 @@ pub fn archive_snapshot_package(
 
         let do_archive_files = |encoder: &mut dyn Write| -> Result<()> {
             let mut archive = tar::Builder::new(encoder);
+            // Serialize the version and snapshots files before accounts so we can quickly determine the version
+            // and other bank fields. This is necessary if we want to interleave unpacking with reconstruction
+            archive.append_path_with_name(staging_dir.as_ref().join("version"), "version")?;
             for dir in ["snapshots", "accounts"] {
                 archive.append_dir_all(dir, staging_dir.as_ref().join(dir))?;
             }
-            archive.append_path_with_name(staging_dir.as_ref().join("version"), "version")?;
             archive.into_inner()?;
             Ok(())
         };