[ovirt-users] Re: oVirt 4.2 and I/O threads configuration

Hi, Please see my comments below. On Tue, Jun 19, 2018 at 11:51 AM, Gianluca Cecchi <gianluca.cecchi(a)gmail.com > > On Tue, Jun 19, 2018 at 10:45 AM, Sharon Gratch <sgratch(a)redhat.com&gt; > >> Hi Gianluca, >> >> You are right, in oVirt 4.2 we removed the 'Num Of IO Threads' text field >> from the UI because it was decided that one IO thread is the best >> configuration from performance aspects for most cases (according to >> performance testings). We wanted to keep the UI simpler to use. >> >> So in case IO threads is enabled via Webadmin UI, only one IO thread is >> always created. >> >> For REST API the configuration remains unchanged in 4.2, so you can still >> set the number of IO threads to be >= 1 if you want for some reason. >> >> Regards, >> Sharon >> >> > Thanks for confirmation. > So I think the manual has to be updated. > Let me know if you want me to open a documentation bug or not. > yes, ​please open a bug ​on that. ​Sure, for setting IO threads number via REST API, you should run the following request: PUT http://engine:port/ovirt-engine/api/vms/vm-id # request body: <vm> <io> <threads>2</threads> </io> </vm> You can replace "2" by any other number, while 0 is for disabling the IO threads. Have you "permission" to detail better the scenario of your test cases, ​I wasn't the one to perform those tests so I don't have those results for sending.​