> On Feb 3, 2018, at 7:57 AM, Igor Kozhukhov <i...@dilos.org> wrote: > > Hi All, > > i’d like to propose implenetation for soft-hba property for scsi layer with > timing updates. > > Problem: we have hw hba like LSI, where we are using direct connetion of > drives to HBA with low latency.
In the past, we’ve done this with an override property, similar to the other properties for sd devices like physical block size, retries, etc. In other words, adding a new global (aka /etc/system virus) is not as elegant as adding an override in sd.conf -- richard > > We have iSCSI drives with sd module usage where we try to use timing related > to HW HBA. > but, latency to denwork drives are different with direct connected local > drives. > > I have impleneted my idea to split sd_soft_io_time for hw nad soft drives: > https://bitbucket.org/dilos/dilos-illumos/commits/b82c668f9e837864afca983809c4d4a28f5051b0 > https://bitbucket.org/dilos/dilos-illumos/commits/4d805e127dc4211671ad70c2e026014e6de4a991 > > and i’m using it with iscsi and aoe drives. > > right now we can use /etc/system vriable sd_soft_io_time > for soft drives and it is not impacts for real hw drives. > > it is example of my idea and if it is can be interest to others i can try > contribute it ot you can try port it to illumos tree. > i have no time try to setup and use original build env and can provide > reports based on DilOS, but i hope change sin sd module based on smartos > changes and can be usable/applicable for illumos. > > Best regards, > -Igor > > openzfs-developer | Archives | Powered by Topicbox ------------------------------------------ openzfs-developer Archives: https://openzfs.topicbox.com/groups/developer/discussions/Ta14496565d3bc26c-M8f8a4e821a54690ec36d2f07 Powered by Topicbox: https://topicbox.com
