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Restore snapshot hard linking

This commit is contained in:
Michael Vines 2021-01-11 09:11:02 -08:00
parent 3bd4c38a84
commit 872a249e97
1 changed files with 13 additions and 21 deletions
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34
runtime/src/snapshot_utils.rs
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@ -135,22 +135,6 @@ impl Ord for SlotSnapshotPaths {
}
}
impl SlotSnapshotPaths {
fn copy_snapshot_directory<P: AsRef<Path>>(&self, snapshot_hardlink_dir: P) -> Result<()> {
// Create a new directory in snapshot_hardlink_dir
let new_slot_hardlink_dir = snapshot_hardlink_dir.as_ref().join(self.slot.to_string());
let _ = fs::remove_dir_all(&new_slot_hardlink_dir);
fs::create_dir_all(&new_slot_hardlink_dir)?;
// Copy the snapshot
fs::copy(
&self.snapshot_file_path,
&new_slot_hardlink_dir.join(self.slot.to_string()),
)?;
Ok(())
}
}
pub fn package_snapshot<P: AsRef<Path>, Q: AsRef<Path>>(
bank: &Bank,
snapshot_files: &SlotSnapshotPaths,
@ -162,7 +146,7 @@ pub fn package_snapshot<P: AsRef<Path>, Q: AsRef<Path>>(
snapshot_version: SnapshotVersion,
) -> Result<AccountsPackage> {
// Hard link all the snapshots we need for this package
let snapshot_hard_links_dir = tempfile::Builder::new()
let snapshot_tmpdir = tempfile::Builder::new()
.prefix(&format!("{}{}-", TMP_SNAPSHOT_DIR_PREFIX, bank.slot()))
.tempdir_in(snapshot_path)?;
@ -173,9 +157,17 @@ pub fn package_snapshot<P: AsRef<Path>, Q: AsRef<Path>>(
snapshot_storages.len()
);
// Any errors from this point on will cause the above AccountsPackage to drop, clearing
// any temporary state created for the AccountsPackage (like the snapshot_hard_links_dir)
snapshot_files.copy_snapshot_directory(snapshot_hard_links_dir.path())?;
// Hard link the snapshot into a tmpdir, to ensure its not removed prior to packaging.
{
let snapshot_hardlink_dir = snapshot_tmpdir
.as_ref()
.join(snapshot_files.slot.to_string());
fs::create_dir_all(&snapshot_hardlink_dir)?;
fs::hard_link(
&snapshot_files.snapshot_file_path,
&snapshot_hardlink_dir.join(snapshot_files.slot.to_string()),
)?;
}
let snapshot_package_output_file = get_snapshot_archive_path(
&snapshot_package_output_path,
@ -187,7 +179,7 @@ pub fn package_snapshot<P: AsRef<Path>, Q: AsRef<Path>>(
bank.slot(),
bank.block_height(),
status_cache_slot_deltas,
snapshot_hard_links_dir,
snapshot_tmpdir,
snapshot_storages,
snapshot_package_output_file,
bank.get_accounts_hash(),