Shmuel Metz , Seymour J. wrote:
> More like a precursor to the cache on a 3880-12.
splitting the difference :-)
3880-11 was "ironwood" ... 8mbyte 4k, "page" record cache
3880-13 was "sheriff" ... 8mbyte, full-track cache
later they were both upgraded to 32mbyte as -21 & -23
old post with some product "code" names
http://www.garlic.com/~lynn/2007e.html#38
FBA rant
there were some early -13 (& -23) literature showing 90percent
cache hit rate. i pointed out that the example was actually 3880
with 10 records per track and reading sequentially. the first record
read
for a track would have a miss and bring in the whole track and then
the subsequent 9 reads would all be hits. I raised the issue that
if the application were to do full-track buffer reads ... that the
same
sequently read would drop to zero percent hit rate.
past posts in this thread:
http://www.garlic.com/~lynn/2008i.html#19
American Airlines
http://www.garlic.com/~lynn/2008i.html#34
American Airlines
http://www.garlic.com/~lynn/2008i.html#35
American Airlines
http://www.garlic.com/~lynn/2008i.html#37
American Airlines
http://www.garlic.com/~lynn/2008i.html#38
American Airlines
http://www.garlic.com/~lynn/2008i.html#39
American Airlines
