Re: computational model of transactions

paul c <toledobythesea_at_oohay.ac> writes:
> Also, in the interest of preserving Marshall's sanity, I must mention
> that somewhere I think Gray mentioned that lock managers can be a
> bottomless pit. I once hired an assistant professor to implement more
> thorough predicate locks. Before he finished he had a nervous
> breakdown. The last time I saw him the secret police were tailing
> him. Then I got ordered to hire a professor. The walk-throughs were
> okay but he prompted only code that wouldn't compile. I thought it
> best to get out with my own sanity. After that the whole thing was
> handed over to a system programmer who knew nothing about db. He
> ignored predicates but being an expert in system resource monitoring
> for accounting purposes and having heard that lock managers could be
> performance hotspots, he added system calls to record things like cpu
> utilization which I thought was a self-fulfilling prophecy and proved
> Gray's point.

i had worked with jim in system/r days
http://www.garlic.com/~lynn/subtopic.html#systemr

and then when my wife and i were doing ha/cmp http://www.garlic.com/~lynn/subtopic.html#hacmp

i designed and did ha/cmp's initial dlm implementation; minor reference
http://www.garlic.com/~lynn/95.html#13

i actually had difference of opinion with jim during '91 sigops conference in asilomor about whether (ha/cmp) commodity clusters could be used in business critical settings.

for a little drift ... recent post about performance management http://www.garlic.com/~lynn/2006o.html#23 Strobe equivalents Received on Tue Aug 01 2006 - 14:50:58 CDT