adding xrootd/xrootd#2373 (#47)

* adding xrootd/xrootd#2373

b_todisk: number of bytes written to disk; and
b_prefetch: number of bytes requested via prefetching.
One can now determine the amount of data cache read from the remote (b_todisk + b_bypass) and also how much of this transfer was driven by prefetching (b_prefetch).

Note that b_todisk includes b_prefetch -- number of bytes for which explicit remote read calls had to be issued is b_todisk + b_bypass - b_prefetch.
adding xrootd/xrootd#2373

* Update Collectors/DetailedCollector.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update Collectors/DetailedCollector.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update Collectors/DetailedCollector.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Derek Weitzel <djw8605@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

Collectors/DetailedCollector.py

@@ -394,8 +394,22 @@ def process_gstream(self, gstream, addr, sid):
                           event["remotes_origin"] = ""
                      event["bytes_hit_cache"] = event.pop("b_hit")
                      event["bytes_miss_cache"] = event.pop("b_miss")
+
                      # number of bytes bypass by the cache due an overload
                      event["bytes_bypass_cache"] = event.pop("b_bypass")
+
+                     # b_todisk: number of bytes written to disk
+                     event["bytes_to_disk"] = event.pop("b_todisk")
+
+                     # b_prefetch: number of bytes requested via prefetching
+                     event["bytes_by_prefetch"] = event.pop("b_prefetch")
+
+                     # One can now determine the amount of data cache read from the remote (b_todisk + b_bypass) and also how much of this transfer was driven by prefetching (b_prefetch). Note that b_todisk includes b_prefetch.
+                     event["bytes_read_by_remote"] = event["bytes_to_disk"] + event["bytes_bypass_cache"] 
+                     
+                     # number of bytes for which explicit remote read calls had to be issued is b_todisk + b_bypass - b_prefetch.
+                     event["bytes_explicit_remote_read"] = event["bytes_to_disk"] + event["bytes_bypass_cache"] - event["bytes_by_prefetch"]
+
                      event["site"] = site
                      event["vo"] = self.returnVO(event["file_path"])
                      fname = event["file_path"]