Changeset 5239 for trunk/Ohana/src/addstar/doc/Changes.txt

Timestamp:

Oct 7, 2005, 3:00:23 PM (21 years ago)

Author:

eugene

Message:

finished basic update concept, added libdvo support

File:

• trunk/Ohana/src/addstar/doc/Changes.txt (modified) (1 diff)

trunk/Ohana/src/addstar/doc/Changes.txt

@@ +1 @@
+
+2005.10.07
+
+        I have finished the basic implementation of the update mode.
+        I have been able to demonstrate substantial improvements in
+        speed when the number of existing measurements dominates the
+        total number of measurements and the number of averages is
+        typically small compared to the number of measurements (ie,
+        most objects are real, detected in most images, and each new
+        image supplies many new measurements of objects which exist
+        and not many of objects which don't exist already).  The speed
+        gain is significant in this context because the average table
+        is small compared to the measure table; since both update and
+        full-load methods require the complete average table, there is
+        no difference in the load time for the average table.  
+
+        I was having some memory collision problems, and attempting to
+        use the ohana_allocate functions reminded me that the libFITS
+        functions were not supported under ohana_allocate.  This was
+        unhelpful.  I bit the bullet and split libohana into libohana
+        (base functions only, including ohana_allocate) and libdvo
+        (functions based on the libautocode structures).  Doing this
+        allowed me to make libFITS depend on libohana (including
+        ohana_allocate).  BUT, this forced me to change all LDFLAGS
+        entries in ohana to swap -lohana -lFITS for -lFITS -lohana,
+        and to add include <fitsio.h> in some cases.
 
 2005.10.06