Questions regarding CPU cores vs rctl limit Post: 303034890

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Operating Systems Solaris Questions regarding CPU cores vs rctl limit Post 303034890 by Peasant on Thursday 9th of May 2019 01:25:48 AM

05-09-2019

Moderator

No. You will need to create a pset with wanted cpu cores and alocate that to specific zone or zones to compliant as far as i recall.

Lets say for simplicity you have 10 zones, 1 global zone and 9 zones
9 zones have 1 vcpu share (including global), while 1 zone has 2 vcpu share.

This means that in only in the case of cpu pressure, say 100%, kernel will guarantee each zone 10% of resources (1 cpu share) and one zone (2 cpu shares) will get 20% of cpu resources.
Not cores per se, but compute power using FSS scheduler.

For instance, all zones are mostly idle using total of 10% cpu, any zone will able to use rest of cpu time, as long there is no competition for cpu time.
Only under cpu pressure the scheduler will kick in to alocate time per ratio (1:1:1:1:1:1:1:1:1:2 = 100) to ensure quality of service per shares configuration.

When using psets allocated to zones, a zone will have dedicated cores defined in pset and no other zone will able to use those cores.
And you will be compliant as oracle hard partition, if that didn't change in the meantime...

Hope that helps.
Regards
Peasant.

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nsd-patch

nsd-patch(8)                                                        nsd 3.2.12                                                        nsd-patch(8)

NAME

       nsd-patch - NSD zone patcher version 3.2.12.

SYNOPSIS

       nsd-patch [-c configfile] [-f] [-h] [-l] [-o dbfile] [-s] [-x difffile]

DESCRIPTION

       Nsd-patch  is the zone patcher for nsd(8). It reads in the nsd database (nsd.db) and difffile (ixfr.db), and overwrites the zone text files
       if they have been updated. Running this regularly ensures that the difffile does not grow infinitely.

OPTIONS

       -c configfile
              Read specified configfile instead of the default /etc/nsd3/nsd.conf.

       -f     Forces writing zone files. Also zones that have not changed are written back to their zone files.

       -h     Print usage help information and exit.

       -l     List the journal entries from the difffile. Does not write to zone files.

       -o dbfile
              Store the output directly to dbfile.

       -s     Skip writing zone files. No zones are written back to their zone files.

       -x difffile
              Read specified difffile. Overrides the config file setting.

FILES

       /var/lib/nsd3/nsd.db
              default NSD database

       /etc/nsd3/nsd.conf
              default NSD configuration file

SEE ALSO

       nsd(8), nsdc(8), nsd.conf(5), nsd-checkconf(8), nsd-notify(8), nsd-xfer(8), zonec(8)

AUTHORS

       NSD was written by NLnet Labs and RIPE NCC joint team. Please see CREDITS file in the distribution for further details.

NLnet Labs                                                         jul 19, 2012                                                       nsd-patch(8)