[dm-devel] Question about multipath device compiled defaults

[Brian Bunker]

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
>>
>
>
> --
> dm-devel mailing list
> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
>



-- 
Brian Bunker
PURE Storage, Inc. <http://www.purestorage.com>
brian at purestorage.com
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