diff --git a/pbs-config/src/acl.rs b/pbs-config/src/acl.rs
index 88345f6c..928a4121 100644
--- a/pbs-config/src/acl.rs
+++ b/pbs-config/src/acl.rs
@@ -337,7 +337,7 @@ impl AclTree {
     fn get_node(&self, path: &[&str]) -> Option<&AclTreeNode> {
         let mut node = &self.root;
         for outer in path {
-            for comp in outer.split("/") {
+            for comp in outer.split('/') {
                 node = match node.children.get(comp) {
                     Some(n) => n,
                     None => return None,
@@ -350,7 +350,7 @@ impl AclTree {
     fn get_node_mut(&mut self, path: &[&str]) -> Option<&mut AclTreeNode> {
         let mut node = &mut self.root;
         for outer in path {
-            for comp in outer.split("/") {
+            for comp in outer.split('/') {
                 node = match node.children.get_mut(comp) {
                     Some(n) => n,
                     None => return None,
@@ -363,7 +363,7 @@ impl AclTree {
     fn get_or_insert_node(&mut self, path: &[&str]) -> &mut AclTreeNode {
         let mut node = &mut self.root;
         for outer in path {
-            for comp in outer.split("/") {
+            for comp in outer.split('/') {
                 node = node.children.entry(String::from(comp)).or_default();
             }
         }
@@ -666,7 +666,7 @@ impl AclTree {
     pub fn get_child_paths(&self, auth_id: &Authid, path: &[&str]) -> Result<Vec<String>, Error> {
         let mut res = Vec::new();
 
-        if let Some(node) = self.get_node(&path) {
+        if let Some(node) = self.get_node(path) {
             let path = path.join("/");
             node.get_child_paths(path, auth_id, &mut res)?;
         }
diff --git a/src/api2/tape/backup.rs b/src/api2/tape/backup.rs
index a1c84b55..472fd5c3 100644
--- a/src/api2/tape/backup.rs
+++ b/src/api2/tape/backup.rs
@@ -486,7 +486,7 @@ fn backup_worker(
                     print_ns_and_snapshot(info.backup_dir.backup_ns(), info.backup_dir.as_ref());
                 if pool_writer.contains_snapshot(
                     datastore_name,
-                    &info.backup_dir.backup_ns(),
+                    info.backup_dir.backup_ns(),
                     info.backup_dir.as_ref(),
                 ) {
                     task_log!(worker, "skip snapshot {}", rel_path);
@@ -512,7 +512,7 @@ fn backup_worker(
 
                 if pool_writer.contains_snapshot(
                     datastore_name,
-                    &info.backup_dir.backup_ns(),
+                    info.backup_dir.backup_ns(),
                     info.backup_dir.as_ref(),
                 ) {
                     task_log!(worker, "skip snapshot {}", rel_path);
diff --git a/src/api2/tape/restore.rs b/src/api2/tape/restore.rs
index ef60380b..ba17bb6f 100644
--- a/src/api2/tape/restore.rs
+++ b/src/api2/tape/restore.rs
@@ -88,7 +88,7 @@ impl TryFrom<Vec<String>> for NamespaceMap {
 }
 
 impl NamespaceMap {
-    fn used_namespaces<'a>(&self, datastore: &str) -> HashSet<BackupNamespace> {
+    fn used_namespaces(&self, datastore: &str) -> HashSet<BackupNamespace> {
         let mut set = HashSet::new();
         if let Some(mapping) = self.map.get(datastore) {
             for (ns, _) in mapping.values() {
@@ -190,8 +190,8 @@ impl DataStoreMap {
     fn target_store(&self, source_datastore: &str) -> Option<Arc<DataStore>> {
         self.map
             .get(source_datastore)
-            .or_else(|| self.default.as_ref())
-            .map(|store| Arc::clone(store))
+            .or(self.default.as_ref())
+            .map(Arc::clone)
     }
 
     fn get_targets(
@@ -397,7 +397,7 @@ pub fn restore(
 
             let email = notify_user
                 .as_ref()
-                .and_then(|userid| lookup_user_email(userid))
+                .and_then(lookup_user_email)
                 .or_else(|| lookup_user_email(&auth_id.clone().into()));
 
             task_log!(worker, "Mediaset '{media_set}'");
@@ -406,7 +406,7 @@ pub fn restore(
             let res = if snapshots.is_some() || namespaces {
                 restore_list_worker(
                     worker.clone(),
-                    snapshots.unwrap_or_else(Vec::new),
+                    snapshots.unwrap_or_default(),
                     inventory,
                     media_set_uuid,
                     drive_config,
@@ -521,7 +521,7 @@ fn restore_full_worker(
             &mut checked_chunks_map,
             restore_owner,
             &email,
-            &auth_id,
+            auth_id,
         )?;
     }
 
@@ -589,7 +589,7 @@ fn check_snapshot_restorable(
 
         have_some_permissions = true;
 
-        if datastore.snapshot_path(&ns, &dir).exists() {
+        if datastore.snapshot_path(&ns, dir).exists() {
             task_warn!(
                 worker,
                 "found snapshot {snapshot} on target datastore/namespace, skipping...",
@@ -603,7 +603,7 @@ fn check_snapshot_restorable(
         bail!("cannot restore {snapshot} to any target namespace due to permissions");
     }
 
-    return Ok(can_restore_some);
+    Ok(can_restore_some)
 }
 
 fn restore_list_worker(
@@ -670,13 +670,13 @@ fn restore_list_worker(
                     let (store, snapshot) = store_snapshot.split_at(idx + 1);
                     let store = &store[..idx]; // remove ':'
 
-                    match parse_ns_and_snapshot(&snapshot) {
+                    match parse_ns_and_snapshot(snapshot) {
                         Ok((ns, dir)) => {
                             match check_snapshot_restorable(
                                 &worker,
                                 &store_map,
-                                &store,
-                                &snapshot,
+                                store,
+                                snapshot,
                                 &ns,
                                 &dir,
                                 true,
@@ -710,7 +710,7 @@ fn restore_list_worker(
                 None => bail!("unexpected error"), // we already checked those
             };
             let (media_id, file_num) =
-                if let Some((media_uuid, file_num)) = catalog.lookup_snapshot(store, &snapshot) {
+                if let Some((media_uuid, file_num)) = catalog.lookup_snapshot(store, snapshot) {
                     let media_id = inventory.lookup_media(media_uuid).unwrap();
                     (media_id, file_num)
                 } else {
@@ -926,7 +926,7 @@ fn restore_list_worker(
     }
 
     for (datastore, _) in store_map.used_datastores().values() {
-        let tmp_path = media_set_tmpdir(&datastore, &media_set_uuid);
+        let tmp_path = media_set_tmpdir(datastore, &media_set_uuid);
         match std::fs::remove_dir_all(&tmp_path) {
             Ok(()) => {}
             Err(err) if err.kind() == std::io::ErrorKind::NotFound => {}
@@ -1193,15 +1193,12 @@ fn restore_partial_chunk_archive<'a>(
 
     let verify_and_write_channel = writer_pool.channel();
 
-    loop {
-        let (digest, blob) = match decoder.next_chunk()? {
-            Some((digest, blob)) => (digest, blob),
-            None => break,
-        };
+    while let Some((digest, blob)) = decoder.next_chunk()? {
+            
         worker.check_abort()?;
 
         if chunk_list.remove(&digest) {
-            verify_and_write_channel.send((blob, digest.clone()))?;
+            verify_and_write_channel.send((blob, digest))?;
             count += 1;
         }
         if chunk_list.is_empty() {
@@ -1326,7 +1323,7 @@ pub fn restore_media(
             &mut catalog,
             checked_chunks_map,
             verbose,
-            &auth_id,
+            auth_id,
         )?;
     }
 
@@ -1388,7 +1385,7 @@ fn restore_archive<'a>(
                         &user_info,
                         &datastore,
                         &backup_ns,
-                        &auth_id,
+                        auth_id,
                         Some(restore_owner),
                     )?;
                     let (owner, _group_lock) = datastore.create_locked_backup_group(
@@ -1483,7 +1480,7 @@ fn restore_archive<'a>(
                             .unwrap_or("_unused_")
                             .to_string(),
                     )
-                    .or_insert(HashSet::new());
+                    .or_default();
 
                 let chunks = if let Some(datastore) = datastore {
                     restore_chunk_archive(
@@ -1649,8 +1646,8 @@ fn restore_chunk_archive<'a>(
         worker.check_abort()?;
 
         if !checked_chunks.contains(&digest) {
-            verify_and_write_channel.send((blob, digest.clone()))?;
-            checked_chunks.insert(digest.clone());
+            verify_and_write_channel.send((blob, digest))?;
+            checked_chunks.insert(digest);
         }
         chunks.push(digest);
     }
@@ -1884,11 +1881,10 @@ pub fn fast_catalog_restore(
                 let wanted = media_set
                     .media_list()
                     .iter()
-                    .find(|e| match e {
+                    .any(|e| match e {
                         None => false,
                         Some(uuid) => uuid == catalog_uuid,
-                    })
-                    .is_some();
+                    });
 
                 if !wanted {
                     task_log!(
diff --git a/src/tape/changer/online_status_map.rs b/src/tape/changer/online_status_map.rs
index a8c2e5e6..5bfa3b3c 100644
--- a/src/tape/changer/online_status_map.rs
+++ b/src/tape/changer/online_status_map.rs
@@ -135,7 +135,7 @@ pub fn update_online_status(
 
     for mut changer_config in changers {
         if let Some(changer) = changer {
-            if changer != &changer_config.name {
+            if changer != changer_config.name {
                 continue;
             }
             found_changer = true;
@@ -158,7 +158,7 @@ pub fn update_online_status(
     let vtapes: Vec<VirtualTapeDrive> = config.convert_to_typed_array("virtual")?;
     for mut vtape in vtapes {
         if let Some(changer) = changer {
-            if changer != &vtape.name {
+            if changer != vtape.name {
                 continue;
             }
             found_changer = true;
diff --git a/src/tape/drive/lto/mod.rs b/src/tape/drive/lto/mod.rs
index 95b7ee1f..813e2179 100644
--- a/src/tape/drive/lto/mod.rs
+++ b/src/tape/drive/lto/mod.rs
@@ -49,7 +49,7 @@ pub fn open_lto_tape_drive(config: &LtoTapeDrive) -> Result<LtoTapeHandle, Error
 
         let mut handle = LtoTapeHandle::new(file)?;
 
-        if !handle.sg_tape.test_unit_ready().is_ok() {
+        if handle.sg_tape.test_unit_ready().is_err() {
             // for autoloader only, try to reload ejected tapes
             if config.changer.is_some() {
                 let _ = handle.sg_tape.load(); // just try, ignore error
@@ -302,7 +302,7 @@ impl TapeDriver for LtoTapeHandle {
 
                         let mut tape_key = [0u8; 32];
 
-                        let uuid_bytes: [u8; 16] = uuid.as_bytes().clone();
+                        let uuid_bytes: [u8; 16] = *uuid.as_bytes();
 
                         openssl::pkcs5::pbkdf2_hmac(
                             &item.key,
diff --git a/src/tape/drive/virtual_tape.rs b/src/tape/drive/virtual_tape.rs
index c325b931..b9423958 100644
--- a/src/tape/drive/virtual_tape.rs
+++ b/src/tape/drive/virtual_tape.rs
@@ -198,7 +198,7 @@ impl VirtualTapeHandle {
         match status.current_tape {
             Some(VirtualTapeStatus { ref mut pos, .. }) => {
                 if count <= *pos {
-                    *pos = *pos - count;
+                    *pos -= count;
                 } else {
                     bail!("backward_space_count_files failed: move before BOT");
                 }
diff --git a/src/tape/media_catalog.rs b/src/tape/media_catalog.rs
index f66542a2..7fd007be 100644
--- a/src/tape/media_catalog.rs
+++ b/src/tape/media_catalog.rs
@@ -18,6 +18,7 @@ use pbs_api_types::{parse_ns_and_snapshot, print_ns_and_snapshot, BackupDir, Bac
 
 use crate::tape::{file_formats::MediaSetLabel, MediaId};
 
+#[derive(Default)]
 pub struct DatastoreContent {
     pub snapshot_index: HashMap<String, u64>, // snapshot => file_nr
     pub chunk_index: HashMap<[u8; 32], u64>,  // chunk => file_nr
@@ -611,7 +612,7 @@ impl MediaCatalog {
 
         self.content
             .entry(store.to_string())
-            .or_insert(DatastoreContent::new());
+            .or_default();
 
         self.current_archive = Some((uuid, file_number, store.to_string()));
 
@@ -728,7 +729,7 @@ impl MediaCatalog {
         let content = self
             .content
             .entry(store.to_string())
-            .or_insert(DatastoreContent::new());
+            .or_default();
 
         content.snapshot_index.insert(path, file_number);
 
@@ -858,7 +859,7 @@ impl MediaCatalog {
 
                     self.content
                         .entry(store.to_string())
-                        .or_insert(DatastoreContent::new());
+                        .or_default();
 
                     self.current_archive = Some((uuid, file_number, store.to_string()));
                 }
@@ -895,7 +896,7 @@ impl MediaCatalog {
                     let content = self
                         .content
                         .entry(store.to_string())
-                        .or_insert(DatastoreContent::new());
+                        .or_default();
 
                     content
                         .snapshot_index
@@ -1016,19 +1017,17 @@ impl MediaSetCatalog {
     pub fn list_snapshots(&self) -> impl Iterator<Item = (&str, &str)> {
         self.catalog_list
             .values()
-            .map(|catalog| {
+            .flat_map(|catalog| {
                 catalog
                     .content
                     .iter()
-                    .map(|(store, content)| {
+                    .flat_map(|(store, content)| {
                         content
                             .snapshot_index
                             .keys()
                             .map(move |key| (store.as_str(), key.as_str()))
                     })
-                    .flatten()
             })
-            .flatten()
     }
 }
 
diff --git a/src/tape/media_pool.rs b/src/tape/media_pool.rs
index fa99c95c..0593feb4 100644
--- a/src/tape/media_pool.rs
+++ b/src/tape/media_pool.rs
@@ -432,14 +432,14 @@ impl MediaPool {
             res
         });
 
-        free_media.pop().map(|e| e.clone())
+        free_media.pop().cloned()
     }
 
     // Get next empty media
     pub fn next_empty_media(&self, media_list: &[BackupMedia]) -> Option<MediaId> {
         let mut empty_media = Vec::new();
 
-        for media in media_list.into_iter() {
+        for media in media_list.iter() {
             if !self.location_is_available(media.location()) {
                 continue;
             }
@@ -472,7 +472,7 @@ impl MediaPool {
     ) -> Option<MediaId> {
         let mut expired_media = Vec::new();
 
-        for media in media_list.into_iter() {
+        for media in media_list.iter() {
             if !self.location_is_available(media.location()) {
                 continue;
             }
diff --git a/src/tape/pool_writer/mod.rs b/src/tape/pool_writer/mod.rs
index d87f7dec..25123720 100644
--- a/src/tape/pool_writer/mod.rs
+++ b/src/tape/pool_writer/mod.rs
@@ -106,7 +106,7 @@ impl PoolWriter {
     pub fn get_used_media_labels(&self) -> Result<Vec<String>, Error> {
         let mut res = Vec::with_capacity(self.used_tapes.len());
         for media_uuid in &self.used_tapes {
-            let media_info = self.pool.lookup_media(&media_uuid)?;
+            let media_info = self.pool.lookup_media(media_uuid)?;
             res.push(media_info.label_text().to_string());
         }
 
@@ -271,7 +271,7 @@ impl PoolWriter {
 
         self.catalog_set.lock().unwrap().append_catalog(catalog)?;
 
-        let media_set = media.media_set_label().clone().unwrap();
+        let media_set = media.media_set_label().unwrap();
 
         let encrypt_fingerprint = media_set
             .encryption_key_fingerprint
@@ -390,7 +390,7 @@ impl PoolWriter {
     fn append_media_set_catalogs(&mut self, worker: &WorkerTask) -> Result<(), Error> {
         let media_set = self.pool.current_media_set();
 
-        let mut media_list = &media_set.media_list()[..];
+        let mut media_list = media_set.media_list();
         if media_list.len() < 2 {
             return Ok(());
         }