fix(nexus): fixing missing I/Os during nexus rebuild

io-engine-tests/Cargo.toml

@@ -15,6 +15,7 @@ bytes = "1.5.0"
 chrono = "0.4.31"
 colored_json = "4.0.0"
 crossbeam = "0.8.2"
+derive_builder = "0.12.0"
 etcd-client = "0.12.1"
 function_name = "0.3.0"
 futures = "0.3.28"

io-engine-tests/src/file_io.rs

@@ -1,6 +1,7 @@
 use once_cell::sync::OnceCell;
 use rand::{distributions::Uniform, Rng, SeedableRng};
 use rand_chacha::ChaCha8Rng;
+use serde::Serialize;
 use std::{
     fmt::{Display, Formatter},
     io::SeekFrom,
@@ -26,7 +27,8 @@ fn create_test_buf(buf_size: DataSize) -> Vec<u8> {
 }
 
 /// TODO
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize)]
+#[serde(into = "u64")]
 pub struct DataSize(u64);
 
 impl Display for DataSize {
@@ -47,6 +49,12 @@ impl From<DataSize> for usize {
     }
 }
 
+impl From<u64> for DataSize {
+    fn from(value: u64) -> Self {
+        Self::from_bytes(value)
+    }
+}
+
 impl Default for DataSize {
     fn default() -> Self {
         Self::from_bytes(0)