id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
236	measure the effect of a more memory-local zfec variant on a webapi server	zooko	zooko	"The preliminary results of the load tests (""the webapi servers are the busy points. Each webapi server is on its own machine. Each one is consuming anywhere from 30% to 70% CPU."") suggest that zfec might be a bottleneck in a complete system (grid plus webapi servers).  I have some patches to zfec which constrain its use of memory to be more localized in order to fit into smaller caches.

I will measure whethermany zfec processes running in parallel on one server-sized machine (an Athlon64 2.4 GHz, 512 KiB L2 cache, 4 GiB DDR2 RAM) benefit or suffer from this locality optimization.
"	enhancement	new	minor	undecided	code-encoding	0.7.0		performance memory zfec large