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Operating Systems Solaris Global and non-global zone resource sharing - tricky Post 302962684 by Peasant on Thursday 17th of December 2015 10:42:36 AM
Old 12-17-2015
Well, rule of thumb is not to run applications in global zone.
Exception could be backup software or monitoring/log shipment software..

Is there any practical reason not to have that application running in non-global zone ?

Personally, i use FSS scheduler with global/non-global zones and control the CPU resources using shares. Global zone has 1 share by default.

Shares are bit different then CPU caps you are using.. for instance you have 10 shares of CPU (when used 100% all 10 shares are used) running 1 global zone and 2 zones.

You set 6 and 3 cpu shares for two non-global zones (1 is for global zone), which means that zone with 6 shares will get 60% of CPU in case of CPU resource contention.
Otherwise it can use all the CPU.

So FSS guarantees CPU time in mentioned relation.
10 CPU share = 100 % CPU, global zone : zone1 : zone2 = 1:6:3

10 is a number you choose, you can choose 100 as well as any other number which will represent maximum CPU time which you will divide among zones.

I found this to be most effective in terms of harnessing CPU power when needed by single zone so far and giving guarantees if things go bananas.

Of course, you can change that as administrator from global zone, even on runtime, using prctl effectively giving additional CPU shares to a zone or a single process.

Hope that helps
Regards
Peasant.
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named-checkzone(1)					      General Commands Manual						named-checkzone(1)

NAME
named-checkzone - zone validity checking tool SYNOPSIS
class] mode] mode] outfile] directory] directory] zonename [filename] DESCRIPTION
is a tool for performing integrity checks on the zone contents. It uses the same integrity checks as the daemon when loading a zone. This makes useful for checking zone files before configuring them into a name server. Zones and zone files are described in named.conf(4). Options Specify the class of the zone. Dump the zone file in canonical format. Enable debugging. Read the journal (if it exists) when loading the zone file. Perform checks with the specified failure mode. Possible modes are (default), and The option is described in named.conf(4). Specify whether NS records should be checked to see if they are addresses. Possible modes are (default), and Write zone output to outfile . Enable quiet mode for exit code only. Print the version of and exit. Change to directory (see chdir(2)) so that relative file names in master file directives work This is similar to the clause in Operands filename The file to use for checking the zone contents. The default is the file with the zone name. For the default to work, the file name for the zone in the statement of the file must be identical to the zone name. zonename The zone whose contents are to be checked. RETURN VALUE
sets the exit status to: Success. Errors were detected. EXAMPLES
To perform integrity checks on zone in the zone file and display debug information: AUTHOR
was developed by the Internet Systems Consortium (ISC). SEE ALSO
named(1M), chdir(2), named.conf(4). Requests for Comments (RFC): 1035, available online at available online at available from the Internet Systems Consortium at BIND 9.3 named-checkzone(1)
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