.

wcfs/wcfs.go

@@ -273,6 +273,14 @@ package main
 //	won't be served from OS file cache and instead will trigger a FUSE read
 //	request to wcfs.
 //
+// - for file δFtail invalidation info is maintained:
+//
+//	- tail of [](rev↑, []#blk)
+//	- {} #blk -> []rev↑ in tail	XXX needed?
+//
+//   δFtail describes changes to file we learned from ZODB invalidation.
+//   XXX and allows to quick #blk -> ... ?
+//
 // - XXX δZtail of invalidation info is maintained.
 //
 //	- tail of [](tid↑, []oid)
@@ -365,7 +373,7 @@ package main
 // δ(BTree) in wcfs context:
 //
 // . -k(blk) -> invalidata #blk
-// . +k(blk) -> ignore (no need to invalidate)
+// . +k(blk) -> invalidate #blk (e.g. if blk was previously read as hold)
 //
 //
 //
@@ -374,7 +382,8 @@ package main
 // XXX serving read from @<rev>/data
 //
 //
-//
+// XXX(integrate place=?) ZData - ne need to keep track -> ZBlk1 is always
+// marked as changed on blk data change.
 //
 //
 // - XXX(kill) 1 ZODB connection per 1 bigfile (each bigfile can be at its different @at,