[server][hotfix] Allow not to do kv snapshot (#30)

Author: luoyuxia

fluss-server/src/main/java/com/alibaba/fluss/server/kv/snapshot/PeriodicSnapshotManager.java

@@ -141,8 +141,8 @@ public static PeriodicSnapshotManager create(
     }
 
     public void start() {
-        // disable periodic snapshot when periodicMaterializeDelay is negative
-        if (!started && periodicSnapshotDelay >= 0) {
+        // disable periodic snapshot when periodicMaterializeDelay is not positive
+        if (!started && periodicSnapshotDelay > 0) {
 
             started = true;
 

website/docs/quickstart/flink.md

@@ -54,6 +54,7 @@ services:
         tablet-server.host: tablet-server
         data.dir: /tmp/fluss/data
         remote.data.dir: /tmp/fluss/remote-data
+        kv.snapshot.interval: 0s
         lakehouse.storage: paimon
         paimon.catalog.metastore: filesystem
         paimon.catalog.warehouse: /tmp/paimon