Has anyone reported decreased performance with hyper-threading? On Tue, Jan 24, 2017 at 11:18 AM, Aljoscha Krettek <aljos...@apache.org> wrote:
> Hi, > that wording is from a time where no-one though about VMs with virtual > cores. IMHO this maps directly to virtual cores so you should set it > according to the number of virtual cores of your VMs. > > Cheers, > Aljoscha > > On Mon, 23 Jan 2017 at 11:51 Nancy Estrada <nancy.a.estr...@gmail.com> > wrote: > >> Hi all, >> >> I have been reading about how to configure Flink when we have a set up >> consisting on a couple of VMs with more than 1 vCore. I am a bit confused >> about how to set the degree of parallelism in the >> taskmanager.numberOfTaskSlots parameter: >> >> * According to the Flink documentation[1], this value is typically >> proportional to the number of/ physical CPU cores/ that the TaskManager’s >> machine has. >> >> * However the YARN documentation[2], makes reference to the number of >> /Virtual CPU cores/ per TaskManager. >> >> My question is, If my Flink Jobs will be running on VMs (without using >> YARN), the "taskmanager.numberOfTaskSlots" will depend on the number of >> vCPU that mi VM has? or must be related to the physical cores? >> >> Thanks in advance for your help! >> Nancy >> >> [1]https://ci.apache.org/projects/flink/flink-docs- >> release-0.8/config.html >> [2]https://ci.apache.org/projects/flink/flink-docs- >> release-0.8/yarn_setup.html >> >> >> >> -- >> View this message in context: http://apache-flink-user- >> mailing-list-archive.2336050.n4.nabble.com/Flink- >> configuration-tp11210.html >> Sent from the Apache Flink User Mailing List archive. mailing list >> archive at Nabble.com. >> >
