Re: [dm-devel] [PATCH] multipath-tools: add IBM/FlashSystem to hwtable

2016-10-12 Thread Xose Vazquez Perez 
On 10/07/2016 04:24 PM, Steffen Maier wrote:

> You'll notice that we from Linux on s390x have a bit different recommendations
> for some of the values (no_path_retry actually depends on whether you have a
> cluster software/filesystem that can cope with EIO on last-path-loss. 
> Currently,
> I see the default without that, i.e. non-clustered from which we would like 
> to hide any path issues).

This has to be modified manually.

> Is there some way to have "dependent" settings?

No. multipath.conf is mainly static.
Only two options are dynamically reconfigured, ALUA-prio and the hardware 
handler
with "detect_prio" and "retain_attached_hw_handler".

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Re: [dm-devel] [PATCH] multipath-tools: add IBM/FlashSystem to hwtable

2016-10-07 Thread Steffen Maier 

On 10/07/2016 03:15 PM, Xose Vazquez Perez wrote:

System  Vendor Product  Multipathing Policy
=== ==  ===
FlashSystem 710 IBMFlashSystem  Symmetric Active/Active
FlashSystem 720 IBMFlashSystem  Symmetric Active/Active
FlashSystem 810 IBMFlashSystem  Symmetric Active/Active
FlashSystem 820 IBMFlashSystem  Symmetric Active/Active
FlashSystem 840 IBMFlashSystem-9840 Symmetric Active/Active
FlashSystem 900 IBMFlashSystem-9840 Symmetric Active/Active

Based on documentation from the manufacturer:
http://www.redbooks.ibm.com/redbooks/pdfs/sg248271.pdf


IBM RedBooks are more like descriptions for one particular use case as 
described in the book rather than reference manuals.


Product documentation is elsewhere and also updated more often (like 
each product release) than a RedBook.

E.g. for IBM FlashSystem 900:
http://www.ibm.com/support/knowledgecenter/STKMQB/com.ibm.storage.flashsystem900.1.2.doc/tms_multipathing.html

You'll notice that we from Linux on s390x have a bit different 
recommendations for some of the values (no_path_retry actually depends 
on whether you have a cluster software/filesystem that can cope with EIO 
on last-path-loss. Currently, I see the default without that, i.e. 
non-clustered from which we would like to hide any path issues).


Is there some way to have "dependent" settings?


Cc: Hannes Reinecke 
Cc: Christophe Varoqui 
Cc: device-mapper development 
Signed-off-by: Xose Vazquez Perez 
---
 libmultipath/hwtable.c | 7 +++
 1 file changed, 7 insertions(+)

diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index e1b055a..ff6989d 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -522,6 +522,13 @@ static struct hwentry default_hw[] = {
.no_path_retry = NO_PATH_RETRY_QUEUE,
.pgpolicy  = MULTIBUS,
},
+   {
+   /* FlashSystem 710/720/810/820/840/900 */
+   .vendor= "IBM",
+   .product   = "FlashSystem",
+   .no_path_retry = NO_PATH_RETRY_FAIL,
+   .pgpolicy  = MULTIBUS,
+   },
/*
 * IBM Power Virtual SCSI Devices
 *



--
Mit freundlichen Grüßen / Kind regards
Steffen Maier

Linux on z Systems Development

IBM Deutschland Research & Development GmbH
Vorsitzende des Aufsichtsrats: Martina Koederitz
Geschaeftsfuehrung: Dirk Wittkopp
Sitz der Gesellschaft: Boeblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294


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[dm-devel] [PATCH] multipath-tools: add IBM/FlashSystem to hwtable

2016-10-07 Thread Xose Vazquez Perez 
System  Vendor Product  Multipathing Policy
=== ==  ===
FlashSystem 710 IBMFlashSystem  Symmetric Active/Active
FlashSystem 720 IBMFlashSystem  Symmetric Active/Active
FlashSystem 810 IBMFlashSystem  Symmetric Active/Active
FlashSystem 820 IBMFlashSystem  Symmetric Active/Active
FlashSystem 840 IBMFlashSystem-9840 Symmetric Active/Active
FlashSystem 900 IBMFlashSystem-9840 Symmetric Active/Active

Based on documentation from the manufacturer:
http://www.redbooks.ibm.com/redbooks/pdfs/sg248271.pdf

Cc: Hannes Reinecke 
Cc: Christophe Varoqui 
Cc: device-mapper development 
Signed-off-by: Xose Vazquez Perez 
---
 libmultipath/hwtable.c | 7 +++
 1 file changed, 7 insertions(+)

diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index e1b055a..ff6989d 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -522,6 +522,13 @@ static struct hwentry default_hw[] = {
.no_path_retry = NO_PATH_RETRY_QUEUE,
.pgpolicy  = MULTIBUS,
},
+   {
+   /* FlashSystem 710/720/810/820/840/900 */
+   .vendor= "IBM",
+   .product   = "FlashSystem",
+   .no_path_retry = NO_PATH_RETRY_FAIL,
+   .pgpolicy  = MULTIBUS,
+   },
/*
 * IBM Power Virtual SCSI Devices
 *
-- 
2.10.1

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