09-16-2002
dual booting??? multiple instances...
If you are talking about Real UNIX (ie. HPUX, SUN, AIX) and not Linux. Start at the top of this post.
I assume you are asking, in referring to an "instance", as an individual separate version of the UNIX OS running on a system.
I believe that you are wanting to have multiple instances on one box.
Here is a good link to read:
https://www.unix.com/showthread.php?s...highlight=cell
You will need to have a bootable disk for each different instance (UNIX OS). You will only be able to boot one at a time.
EDIT HERE::
If you are talking about Linux on an Intel platform. You will need to have separate partitions on your hard drive or you can still have separate disks for each one. Although I don't know how you could dual boot with multiple versions of the SAME Linux version, never having done this myself!
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LEARN ABOUT CENTOS
pmdelprofile
PMDELPROFILE(3) Library Functions Manual PMDELPROFILE(3)
NAME
pmDelProfile - delete instance(s) from the current PMAPI instance profile
C SYNOPSIS
#include <pcp/pmapi.h>
int pmDelProfile(pmInDom indom, int numinst, int *instlist);
cc ... -lpcp
DESCRIPTION
The set of instances for performance metrics returned from a pmFetch(3) call may be filtered or restricted using an instance profile.
There is one instance profile for each context the application creates at the Performance Metrics Application Programming Interface
(PMAPI), and each instance profile may include instances from one or more instance domains (see pmLookupDesc(3)).
pmDelProfile may be used to delete instance specifications from the instance profile of the current PMAPI context.
In the simplest variant, the list of instances identified by the instlist argument for the indom instance domain are removed from the
instance profile. The list of instance identifiers contains numinst values.
The indom value would normally be extracted from a call to pmLookupDesc(3) for a particular performance metric, and the instances in
instlist would typically be determined by calls to pmGetInDom(3) or pmLookupInDom(3).
If indom equals PM_INDOM_NULL or numinst is zero, then all instance domains are selected for deletion. If instlist is NULL, then all
instances in the selected domain(s) are removed from the profile.
To disable all available instances in all domains, use pmDelProfile(PM_INDOM_NULL, 0, NULL). This is the only situation in which indom may
be PM_INDOM_NULL.
SEE ALSO
pmAddProfile(3), PMAPI(3), pmFetch(3), pmGetInDom(3), pmLookupDesc(3), pmLookupInDom(3), pmNewContext(3), pmUseContext(3) and pmWhichCon-
text(3).
DIAGNOSTICS
PM_ERR_PROFILESPEC
indom was PM_INDOM_NULL and instlist was not empty
CAVEAT
It is possible to delete non-existent instance domains and non-existent instances from an instance profile. None of the routines that use
the instance profile will ever issue an error if you do this. The cost of checking, when checking is possible, outweighs any benefits.
Performance Co-Pilot PCP PMDELPROFILE(3)