Re: [HPDD-discuss] How to read the I/O in flight statistic in obdfilter.*.brw_stats

On 2015/04/08, 6:43 AM, "Michael Kluge" <michael.kluge(a)tu-dresden.de&gt; wrote: > Hi all, > > can anyone please explain how this individual statistic is > calculated/updated? From what I understand it shows how many read or > write requests have been in flight at certain points in time in the > past. What I don't know is: when is this statistic updated. If I had to > guess I would say it must be any of these: > 1) whenever a new I/O request is issued, it puts the number of open > requests in the statistic field It's this one. Cheers, Andreas > 2) there is a service thread that reads the I/O queue size at a fixed > interval > Any help is appreciated! > > > Regards, Michael > > -- > Dr.-Ing. Michael Kluge > > Technische Universität Dresden > Center for Information Services and > High Performance Computing (ZIH) > D-01062 Dresden > Germany > > Contact: > Willersbau, Room A 208 > Phone: (+49) 351 463-34217 > Fax: (+49) 351 463-37773 > e-mail: michael.kluge(a)tu-dresden.de > WWW: http://www.tu-dresden.de/zih > > Cheers, Andreas