Changes between Version 3 and Version 4 of CreditNotes

Timestamp:

Oct 12, 2009, 8:52:33 PM (15 years ago)

Author:

davea

Comment:

--

CreditNotes

@@ -22 +22 @@
 So the two goals are inconsistent; we can't satisfy them both.
 
+We've had two "credit philosophies":
+
+ Credit for FLOPs performed:: this provides device neutrality (more or less).
+ 
+ Credit for peak FLOPS * time:: this provides project neutrality.
+
+Neither approach is adequate by itself.
+We need to find something in the middle.
+
 == Scenarios ==
 
@@ -32 +41 @@
    (say, because of its memory access pattern)
 
+How much credit should the various jobs get?
+It depends.
 
+If almost all hosts are like host B,
+then project 2's jobs should get almost 10 times as much;
+after all, they cost most volunteers 10 times as much electricity.
+
+If almost all hosts are like host A,
+then project 2's jobs should get about as much as project 1's.
+
+Let's try to quantify this.