feat: add iperf3 for Dockerfile and change is_expired for PersistentCacheTask (#975)

Signed-off-by: Gaius <[email protected]>

Author: gaius-qi

ci/Dockerfile

@@ -54,7 +54,7 @@ RUN go install github.com/google/pprof@latest
 
 FROM debian:bookworm-slim
 
-RUN apt-get update && apt-get install -y --no-install-recommends wget curl \
+RUN apt-get update && apt-get install -y --no-install-recommends iperf3 wget curl \
     bash-completion procps apache2-utils ca-certificates binutils bpfcc-tools \
     dnsutils iputils-ping vim linux-perf llvm graphviz \
     && rm -rf /var/lib/apt/lists/*

dragonfly-client-storage/src/metadata.rs

@@ -185,10 +185,7 @@ impl PersistentCacheTask {
 
     /// is_expired returns whether the persistent cache task is expired.
     pub fn is_expired(&self) -> bool {
-        // When scheduler runs garbage collection, it will trigger dfdaemon to evict the persistent cache task.
-        // But sometimes the dfdaemon may not evict the persistent cache task in time, so we select the ttl * 1.2
-        // as the expired time to force evict the persistent cache task.
-        self.created_at + self.ttl * 2 < Utc::now().naive_utc()
+        self.created_at + self.ttl < Utc::now().naive_utc()
     }
 
     /// is_failed returns whether the persistent cache task downloads failed.