Merge branch 'master' into 3198-writable-fuse

[arvados.git] / services / fuse / arvados_fuse / fusedir.py

diff --git a/services/fuse/arvados_fuse/fusedir.py b/services/fuse/arvados_fuse/fusedir.py
index 898af31d263904d73dcd3583ac0c9f83cf54eb4b..0e86c8db2ba1316d01040fbaff32064542f5ddd5 100644 (file)
--- a/services/fuse/arvados_fuse/fusedir.py
+++ b/services/fuse/arvados_fuse/fusedir.py
@@ -344,6 +344,9 @@ class CollectionDirectory(CollectionDirectoryBase):
         return (self.collection_locator is not None)
 
     def objsize(self):
+        # This is an empirically-derived heuristic to estimate the memory used
+        # to store this collection's metadata.  Calculating the memory
+        # footprint directly would be more accurate, but also more complicated.
         return self._manifest_size * 128
 
 class MagicDirectory(Directory):