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Full Discussion: Expand LV
Operating Systems AIX Expand LV Post 302749433 by bakunin on Friday 28th of December 2012 09:24:29 AM
Old 12-28-2012
Quote:
Originally Posted by markper
As I recall, AIX can expand the FS on the fly, correct?
If you mean by "on the fly" online: yes, AIX neither requires a recreation of the FS nor do you have to unmount it, you can do it safely while fully accessing the FS.

If you increase the FS AIX will automatically increase the underlying LV too, so you could use "chfs" without even touching the underlying LV. Increasing the LV prior to increasing the FS gives you just better control over the allocation of the PPs used to increase the size of the LV. If you want to use specific PPs from a certain disks (out of several possible ones) you better increase the LV by hand and only then enlarge the FS, otherwise you can immediately enlarge the FS.

I hope this helps.

bakunin
 

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LEARN ABOUT HPUX

dlpi_max_ub_promisc

dlpi_max_ub_promisc(5)						File Formats Manual					    dlpi_max_ub_promisc(5)

NAME

       dlpi_max_ub_promisc - maximum number of unbound promiscuous streams allowed on a LAN interface

VALUES

   Failsafe
   Default
   Allowed values
       or

   Recommended values
DESCRIPTION

       The  tunable  is  used  to  dynamically	increase or decrease the maximum number of unbound promiscuous streams that can be opened on a LAN
       interface.

       Enabling multiple unbound promiscuous streams may cause CPU utilization to increase up to three times as compared to CPU  utilization  with
       no unbound promiscuous streams.	Increasing the value of this tunable does not by itself degrade networking or kernel performance.

   Who Is Expected to Change This Tunable?
       Privileged user.

   Restrictions on Changing
       Changes	to this tunable take effect immediately.  When value is reduced from a higher value to a lower value, the existing unbound promis-
       cuous streams will not be stopped to accommodate the change.  However, this tunable will limit the  new	unbound  streams  created  on  the
       interface.

   When Should the Value of This Tunable Be Raised?
       This tunable should be raised when the number of unbound promiscuous applications needs to be more than the default value.

   What Are the Side Effects of Raising the Value?
       Side effect may be an increase in CPU utilization.

WARNINGS

       All  HP-UX kernel tunable parameters are release specific.  This parameter may be removed or have its meaning changed in future releases of
       HP-UX.

       Installation of optional kernel software, from HP or other vendors, may cause changes to tunable  parameter  values.   After  installation,
       some  tunable  parameters may no longer be at the default or recommended values.  For information about the effects of installation on tun-
       able values, consult the documentation for the kernel software being installed.	For information about optional kernel  software  that  was
       factory installed on your system, see at

AUTHOR

       was developed by HP.

SEE ALSO

       kctune(1M), lanadmin(1M), gettune(2), settune(2), lan(7).

       DLPI Programmer's Guide on

							     Tunable Kernel Parameters					    dlpi_max_ub_promisc(5)
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