On 0407T1632, Slawa Olhovchenkov wrote: > On Thu, Apr 07, 2016 at 04:23:25AM +0000, Edward Tomasz Napierala wrote: > > > Author: trasz > > Date: Thu Apr 7 04:23:25 2016 > > New Revision: 297633 > > URL: https://svnweb.freebsd.org/changeset/base/297633 > > > > Log: > > Add four new RCTL resources - readbps, readiops, writebps and writeiops, > > for limiting disk (actually filesystem) IO. > > > > Note that in some cases these limits are not quite precise. It's ok, > > as long as it's within some reasonable bounds. > > > > Testing - and review of the code, in particular the VFS and VM parts - is > > very welcome. > > How you calculate iops for sequential IOs? As distinc IOPS or merged? > > I.e. readin 1 sector from offset 100 and immediately reading 1 sectro > from offset 101 accounting as 2IOPS or as 1IOPS?
Probably one, due to taking readahead into account. But it depends on the filesystem, and is only an best-effort estimation. _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
