fix(ec): use constants for default EC shard counts and resolve compiler error

seaweed-volume/src/storage/erasure_coding/ec_volume.rs

@@ -28,8 +28,8 @@ pub struct EcVolume {
 }
 
 pub fn read_ec_shard_config(dir: &str, volume_id: VolumeId) -> (u32, u32) {
-    let mut data_shards = 10;
-    let mut parity_shards = 4;
+    let mut data_shards = crate::storage::erasure_coding::ec_shard::DATA_SHARDS_COUNT as u32;
+    let mut parity_shards = crate::storage::erasure_coding::ec_shard::PARITY_SHARDS_COUNT as u32;
     let vif_path = format!("{}/{}.vif", dir, volume_id.0);
     if let Ok(vif_content) = std::fs::read_to_string(&vif_path) {
         if let Ok(vif_info) = serde_json::from_str::<crate::storage::volume::VifVolumeInfo>(&vif_content) {

seaweed-volume/src/storage/volume.rs

@@ -173,13 +173,15 @@ pub struct VifEcShardConfig {
 pub struct VifVolumeInfo {
     #[serde(default)]
     pub files: Vec<VifRemoteFile>,
+    #[serde(default)]
     pub version: u32,
-    pub collection: String,
-    pub replica_placement: u32,
-    pub ttl: String,
-    #[serde(default, rename = "datFileSize")]
-    pub dat_file_size: u64,
-    #[serde(default, rename = "expireAtSec")]
+    #[serde(default)]
+    pub replication: String,
+    #[serde(default, rename = "bytesOffset")]
+    pub bytes_offset: u32,
+    #[serde(default, rename = "datFileSize", with = "string_or_i64")]
+    pub dat_file_size: i64,
+    #[serde(default, rename = "expireAtSec", with = "string_or_u64")]
     pub expire_at_sec: u64,
     #[serde(default, rename = "readOnly")]
     pub read_only: bool,
@@ -205,9 +207,8 @@ impl VifVolumeInfo {
                 })
                 .collect(),
             version: pb.version,
-            collection: pb.collection.clone(),
-            replica_placement: pb.replica_placement,
-            ttl: pb.ttl.clone(),
+            replication: pb.replication.clone(),
+            bytes_offset: pb.bytes_offset,
             dat_file_size: pb.dat_file_size,
             expire_at_sec: pb.expire_at_sec,
             read_only: pb.read_only,
@@ -235,9 +236,8 @@ impl VifVolumeInfo {
                 })
                 .collect(),
             version: self.version,
-            collection: self.collection.clone(),
-            replica_placement: self.replica_placement,
-            ttl: self.ttl.clone(),
+            replication: self.replication.clone(),
+            bytes_offset: self.bytes_offset,
             dat_file_size: self.dat_file_size,
             expire_at_sec: self.expire_at_sec,
             read_only: self.read_only,