Re: multipath-tools: add INSPUR/MCS to hardware table

[Martin Wilck <mwilck@suse.com>]

On Tue, 2018-01-30 at 01:54 +0000, Tom Geng(耿芳忠) wrote:
> Hi, Martin,
> .pgfailback    = -FAILBACK_IMMEDIATE  is OK for INSPUR/MCS in ALUA
> mode. We have tested failback function, the device controller works
> well. 
> Thank you a lot.

That's not what I meant. ".pgfailback" controls what happens if a once
lost path comes back online. ".pgpolicy" controls how the load is
distributed over healthy paths. The default .pgpolicy = failover means
that you'll only ever have one "running" path at any time (iow, no load
balancing). I asked you to confirm that that's what you need.

Martin

> 
> 
> 
> -----Original Message-----
> From: Martin Wilck [mailto:mwilck@suse.com] 
> Sent: Monday, January 29, 2018 9:38 PM
> To: Tom Geng(耿芳忠) <gengfangzhong@inspur.com>; xose.vazquez@gmail.com
> Cc: dm-devel@redhat.com
> Subject: Re: [dm-devel] multipath-tools: add INSPUR/MCS to hardware
> table
> 
> On Mon, 2018-01-29 at 06:04 +0000, Tom Geng(耿芳忠) wrote:
> > Hi, Xose,
> > I sent the patch to dm-devel last week, but forgot to CC you.
> > Please 
> > help to review and have chance to submit to the mainline.
> > Thank you a lot.
> > 
> > 
> > > From 091bae5fec22c61f0c3e6f9ab848fecae5203122 Mon Sep 17 00:00:00
> > > 2001
> > 
> > From: Tom Geng <gengfangzhong@inspur.com>
> > Date: Tue, 23 Jan 2018 15:33:09 +0800
> > Subject: [PATCH] multipath-tools: add INSPUR/MCS to hardware table
> > 
> > ---
> >  libmultipath/hwtable.c | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c index 
> > 448effe3..93d67df0 100644
> > --- a/libmultipath/hwtable.c
> > +++ b/libmultipath/hwtable.c
> > @@ -1181,6 +1181,17 @@ static struct hwentry default_hw[] = {
> >  		.pgpolicy      = MULTIBUS,
> >  		.no_path_retry = 30,
> >  	},
> > +	/*
> > +	 * INSPUR
> > +	 */
> > +	{
> > +		/* AS5300/AS5500 G2 */
> > +		.vendor        = "INSPUR",
> > +		.product       = "MCS",
> > +		.pgpolicy      = GROUP_BY_PRIO,
> > +		.pgfailback    = -FAILBACK_IMMEDIATE,
> > +		.prio_name     = PRIO_ALUA,
> > +	},
> >  	/*
> >  	 * EOL
> >  	 */
> 
> multipath-tools default to .pgpolicy = failover. Please confirm that
> this is really your intention.
> 
> Martin
> 
> --
> Dr. Martin Wilck <mwilck@suse.com>, Tel. +49 (0)911 74053 2107 SUSE
> Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB
> 21284 (AG Nürnberg)
> 

-- 
Dr. Martin Wilck <mwilck@suse.com>, Tel. +49 (0)911 74053 2107
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)

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