id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,cpu,platform 1625,Disk performance degrades by several orders of magnitude on two processes,sprice,grass-dev@…,"When there are two GRASS process competing for a single disk on an I/O bound task, performance doesn't just half. It decreases by several orders of magnitude. However, 'iostat' lists just as much data flowing off the disk as would be expected. Also, when one task is canceled, the other process doesn't recover. 'iostat' claims that just as much data is flowing, but the remaining process remains degraded until it is canceled and restarted. I'd try to give a bit more debug info, but I suspect that it's some sort of interaction with a caching layer in GRASS where extra data is read, and then discarded, many times.",defect,closed,normal,7.0.7,Default,svn-trunk,wontfix,,,x86-64,MacOSX