Inherited VIO server an LPARs Post: 302498186

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Operating Systems AIX Inherited VIO server an LPARs Post 302498186 by ross.mather on Sunday 20th of February 2011 07:39:09 AM

02-20-2011

Registered User

One or two VIO is largely a matter of what the Availability requirements of the server are. In general a Production environment should have dual VIO servers. In this config howeer I expect that the issue will be around the use of the Disk Adapters.

Each disk adapter can belong to exactly one LPAR (incl a VIO), so the existing arrangement probably only has one disk adapter - hence one VIO.

If you are buying a new CEC (or is it an I/O drawer? ) you will add at least one more Disk Adapter so you could go to twin VIO. That said its still recommended to mirror the rootvg even in that environment so now 4 disks would be taken up with VIO operating systems.

Even so you'd still be left with the headache of multiple LVs being allocated to each LPAR from each VIO server and the inevitable number of resyncs you'd need after a failure or reboot of a VIO.

The best solution in these kind of environments is to use a Fibre Channel SAN storage array that can then have LUNs connected to each LPAR via one or both VIO servers (depending how you implement it). In that way its the additional pathing that is redundant not the additional disk copy.

If you are going to stick with one VIO and all those new disks - try and get a RAID card so you can create a single RAID array with all the disks, that at least would ease the management of it as the RAID array will take care of keeping the 2 copies of data on separate disks. That said - the I/O performance of this environment will be very poor.

Quote:

I'm afraid there has been no training

This is criminal, drop me a PM and I may be able to point you in the right direction in the UK to close that skills gap.

cheers
Ross

ross.mather

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roarvs

roarvs(7)						System Manager's Manual: RoarAuido						 roarvs(7)

NAME

       libroar - RoarAudio sound library

       roarvs - RoarAudio very simple API

SYNOPSIS

	#include <roaraudio.h>

	roar_vs_t * vss;

DESCRIPTION

       The  VS	(for  Very  Simple)  API  is  a high level abstraction layer used to allow use of RoarAudio from very simple programs. The API was
       designed to help people to easly upgrade existing artsc and pulse-simple code to RoarAudio. While the API is equivalently simple it is much
       more powerful than one one by aRtsc or PulseAudio.

       The VS API also has a mode to play back (and record) files easly. As this uses VIO/DSTR it can handle streams as well.

TUTORIALS

       Tutorials can be found in roartut(7).

IMPORTANT FUNCTIONS

       There are several important functions. This is a small list of the most important ones.

       Error handling
	      roar_vs_strerr(3)

       Opening
	      roar_vs_new(3), roar_vs_new_simple(3), roar_vs_new_playback(3), roar_vs_new_from_file(3)

       Closing
	      roar_vs_close(3)

       Reading and writing
	      roar_vs_read(3), roar_vs_write(3)

       Non-Blocking and Asyncron IO
	      roar_vs_blocking(3), roar_vio_select(3)

       Volume and Flags
	      roar_vs_pause(3), roar_vs_mute(3), roar_vs_volume_mono(3), roar_vs_volume_stereo(3), roar_vs_volume_get(3)

       Meta data
	      roar_vs_meta(3), roar_vs_role(3)

       File mode
	      roar_vs_file(3), roar_vs_file_simple(3), roar_vs_iterate(3), roar_vs_run(3)

       Buffered mode
	      roar_vs_buffer(3), roar_vs_iterate(3), roar_vs_run(3)

BUGS

       A lot...

SEE ALSO

       roar-config(1), roartypes(1), roartut(7), RoarAudio(7).

RoarAudio							     June 2011								 roarvs(7)