refine docs

Signed-off-by: Bugen Zhao <i@bugenzhao.com>

risedev.yml

@@ -380,7 +380,6 @@ risedev:
       unsafe-no-fsync: true
     - use: meta-node
       unsafe-disable-recovery: true
-      enable-committed-sst-sanity-check: true
     - use: compute-node
       port: 5687
       exporter-port: 1222
@@ -430,6 +429,7 @@ risedev:
     - use: compactor
     - use: redis
 
+
 compose:
   risingwave: "ghcr.io/risingwavelabs/risingwave:latest"
   prometheus: "prom/prometheus:latest"

src/risedevtool/src/task/compute_node_service.rs

@@ -106,7 +106,8 @@ impl ComputeNodeService {
 
         if provide_compute_node.len() > 1 && !is_shared_backend {
             // Using a non-shared backend with multiple compute nodes will be problematic for state
-            // sharing like scaling. For normal end-to-end tests, this is acceptable.
+            // sharing like scaling. For distributed end-to-end tests with in-memory state store,
+            // this is acceptable.
         }
 
         let provide_meta_node = config.provide_meta_node.as_ref().unwrap();

src/storage/src/memory.rs

@@ -38,7 +38,10 @@ mod batched_iter {
 
     /// A utility struct for iterating over a range of keys in a locked `BTreeMap`, which will batch
     /// some records to make a trade-off between the copying overhead and the times of acquiring
-    /// the lock. Users should handle MVCC by themselves.
+    /// the lock.
+    ///
+    /// Therefore, it's not guaranteed that we're iterating over a consistent snapshot of the map.
+    /// Users should handle MVCC by themselves.
     pub struct Iter<K, V> {
         inner: Arc<RwLock<BTreeMap<K, V>>>,
         range: (Bound<K>, Bound<K>),