[dm-devel] Question about multipath device compiled defaults

[Christophe Varoqui]

Ok, merged.

On Tue, Jan 19, 2016 at 11:17 PM, Brian Bunker <brian at purestorage.com>
wrote:

> There are just two files I touch, so the patch is simple:
>
> diff -Naur 3/multipath-tools/libmultipath/hwtable.c
> 4/multipath-tools/libmultipath/hwtable.c
> --- 3/multipath-tools/libmultipath/hwtable.c    2016-01-14
> 17:47:06.000000000 -0800
> +++ 4/multipath-tools/libmultipath/hwtable.c    2016-01-14
> 18:33:45.000000000 -0800
> @@ -1166,6 +1166,22 @@
>                 .prio_name     = PRIO_ALUA,
>                 .prio_args     = NULL,
>         },
> +        {
> +               .vendor        = "PURE",
> +               .product       = "FlashArray",
> +               .features      = DEFAULT_FEATURES,
> +               .hwhandler     = DEFAULT_HWHANDLER,
> +               .selector      = "queue-length 0",
> +               .pgpolicy      = MULTIBUS,
> +               .pgfailback    = -FAILBACK_IMMEDIATE,
> +               .checker_name  = TUR,
> +               .fast_io_fail  = 10,
> +                .user_friendly_names = USER_FRIENDLY_NAMES_OFF,
> +               .prio_name     = DEFAULT_PRIO,
> +                .no_path_retry = 0,
> +                .dev_loss      = 60,
> +               .prio_args     = NULL,
> +       },
>         /*
>          * EOL
>          */
> diff -Naur 3/multipath-tools/multipath.conf.defaults
> 4/multipath-tools/multipath.conf.defaults
> --- 3/multipath-tools/multipath.conf.defaults   2016-01-14
> 17:47:06.000000000 -0800
> +++ 4/multipath-tools/multipath.conf.defaults   2016-01-14
> 18:35:50.000000000 -0800
> @@ -940,6 +940,17 @@
>  #              rr_weight "uniform"
>  #              no_path_retry "queue"
>  #      }
> +#       device {
> +#               vendor "PURE"
> +#               path_selector "queue-length 0"
> +#               path_grouping_policy "multibus"
> +#               path_checker "tur"
> +#               fast_io_fail_tmo 10
> +#               user_friendly_names "no"
> +#               no_path_retry 0
> +#               features 0
> +#               dev_loss_tmo 60
> +#       }
>  #}
>  #multipaths {
>  #}
>
>
> Thanks,
> Brian
>
> On Tue, Jan 19, 2016 at 8:48 AM, Christophe Varoqui <
> christophe.varoqui at opensvc.com> wrote:
>
>> Hi,
>>
>> and when you are ready, you can post the patch here so I can merge it
>> upstream.
>>
>> Thanks,
>> Christophe Varoqui
>> OpenSVC
>>
>> On Tue, Jan 19, 2016 at 5:35 PM, Mauricio Faria de Oliveira <
>> mauricfo at linux.vnet.ibm.com> wrote:
>>
>>> On 11/05/2015 04:59 AM, Doron Tal1 wrote:
>>>
>>>> I would like to know how and what procedure i should follow if i want to
>>>> modify or add new settings to the device mapper defaults.
>>>>
>>>
>>> The defaults are in hwtable.c [1].
>>>
>>> So for example how can i modify existing compiled settings for the
>>>> 2810XIV device? in case i want to add a new device and it settings, how
>>>> can it be done?
>>>>
>>>
>>> To modify the compiled settings, you have to modify it and recompile.
>>>
>>> To modify the runtime settings (based on the defaults), you can modify
>>> /etc/multipath.conf (see its manpage [2] with 'man multipath.conf').
>>>
>>> You can verify the the setting values used during multipath discovery
>>> with 'multipath -v3' for example, or "multipathd -k'show config'".
>>>
>>> Hope this might still help at this time,
>>>
>>> [1]
>>> http://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=libmultipath/hwtable.c
>>> [2]
>>> http://git.opensvc.com/gitweb.cgi?p=multipath-tools/.git;a=blob;f=multipath/multipath.conf.5
>>>
>>> --
>>> Mauricio Faria de Oliveira
>>> IBM Linux Technology Center
>>>
>>> --
>>> dm-devel mailing list
>>> dm-devel at redhat.com
>>> https://www.redhat.com/mailman/listinfo/dm-devel
>>>
>>
>>
>> --
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>> dm-devel at redhat.com
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>>
>
>
>
> --
> Brian Bunker
> PURE Storage, Inc. <http://www.purestorage.com>
> brian at purestorage.com
>
> --
> dm-devel mailing list
> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
>
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