04-17-2008
I think i have told you already in the other thread the concept of PPs and PP size.
The value is freely selectable upon creation of the VOLUME GROUP, not the LUN. However it limits your disk size as well as the total capacity of the Volume Group you create: maximum 1019 PPs per PV (=hdisk device) and maximum 32 PVs per VG.
Since you plan to create only one PV (as you said in the other thread) you should select the PP size so that you are not near the 1019 PPs per PV limit.
Example: If the LUN is, say, 50GB in size you should use a PP size of 256MB or 512MB if no other aspects apply.
This way you will be able to use LUNs of up to roughly 250 (500) GB in size giving you a theoretical total of approx. 8 (16) TB in the VG. This should be enough space to grow into for most practical purposes when right now your VGs data fit into the 50 GB i based my example on.
I hope this helps.
bakunin
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VMPK(1) User Commands VMPK(1)
NAME
vmpk - Virtual MIDI Piano Keyboard
SYNOPSIS
vmpk [Standard options...]
DESCRIPTION
This manual page documents briefly the vmpk program.
This program has standard Qt programs options.
Virtual MIDI Piano Keyboard is a MIDI events generator and receiver. It doesn't produce any sound by itself, but can be used to drive a
MIDI synthesizer (either hardware or software, internal or external). You can use the computer's keyboard to play MIDI notes, and also the
mouse. You can use the Virtual MIDI Piano Keyboard to display the played MIDI notes from another instrument or MIDI file player.
OPTIONS
-style=style
sets the application GUI style. Possible values are motif, windows, and platinum. If you compiled Qt with additional styles or have
additional styles as plugins these will be available to the -style command line option
-stylesheet=stylesheet
sets the application styleSheet. The value must be a path to a file that contains the Style Sheet. Note: Relative URLs in the Style
Sheet file are relative to the Style Sheet file's path.
-session=session
restores the application from an earlier session.
-widgetcount
prints debug message at the end about number of widgets left undestroyed and maximum number of widgets existed at the same time
-reverse
sets the application's layout direction to Qt::RightToLeft
-graphicssystem
sets the backend to be used for on-screen widgets and QPixmaps. Available options are raster and opengl.
-display display
sets the X display (default is $DISPLAY).
-geometry geometry
sets the client geometry of the first window that is shown.
-fn|-font font
defines the application font. The font should be specified using an X logical font description.
-bg|-background color
sets the default background color and an application palette (light and dark shades are calculated).
-fg|-foreground color
sets the default foreground color.
-btn|-button color
sets the default button color.
-name name
sets the application name.
-title title
sets the application title.
-visual TrueColor
forces the application to use a TrueColor visual on an 8-bit display.
-ncols count
limits the number of colors allocated in the color cube on an 8-bit display, if the application is using the QApplication::ManyColor
color specification. If count is 216 then a 6x6x6 color cube is used (i.e. 6 levels of red, 6 of green, and 6 of blue); for other
values, a cube approximately proportional to a 2x3x1 cube is used.
-cmap
causes the application to install a private color map on an 8-bit display.
-im
sets the input method server (equivalent to setting the XMODIFIERS environment variable)
-inputstyle
defines how the input is inserted into the given widget, e.g., onTheSpot makes the input appear directly in the widget, while
overTheSpot makes the input appear in a box floating over the widget and is not inserted until the editing is done.
LICENSE
This manual page was written by Mehdi Dogguy <dogguy@pps.jussieu.fr> for the Debian GNU/Linux system (but may be used by others).
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 3 or any
later version published by the Free Software Foundation; considering as source code all the file that enable the production of this
manpage.
AUTHOR
Mehdi Dogguy <dogguy@pps.jussieu.fr>
COPYRIGHT
Copyright (C) 2009 Mehdi Dogguy
vmpk 0.3.3 June 7, 2009 VMPK(1)