diff --git a/Filer-Active-Active-xDC-synchronization.md b/Filer-Active-Active-xDC-synchronization.md
index 4e243ed..79c0057 100644
--- a/Filer-Active-Active-xDC-synchronization.md
+++ b/Filer-Active-Active-xDC-synchronization.md
@@ -73,3 +73,4 @@ Also, the "signature" will ensure same change will only be applied once in one f
 
 This should be fairly scalable. However, it is limited by network bandwidth and latency. So even though changes are received within milliseconds and replayed right away, there would be data discrepancies if a file is changed quickly in two distant data centers.
 
+For large clusters, the rate of change may be so high that the replication can not catch up. You may want to only synchronize a specific folder to reduce the work load.