[dm-devel] [PATCH] multipath-tools: make EMC/Invista config work with alua and multibus

[Xose Vazquez Perez]

Optimal Path Management (OPM) was introduced with VPLEX 5.5 to improve VPLEX
performance. OPM uses the ALUA mechanism to spread the I/O load across VPLEX directors
while gaining cache locality, pag #187:
https://www.delltechnologies.com/en-us/collaterals/unauth/technical-guides-support-information/products/storage-2/docu5128.pdf

Cc: Martin Wilck <mwilck at suse.com>
Cc: Benjamin Marzinski <bmarzins at redhat.com>
Cc: Christophe Varoqui <christophe.varoqui at opensvc.com>
Cc: DM-DEVEL ML <dm-devel at redhat.com>
Signed-off-by: Xose Vazquez Perez <xose.vazquez at gmail.com>
---
 libmultipath/hwtable.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index 7095aaf1..4e8b52ff 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -350,8 +350,9 @@ static struct hwentry default_hw[] = {
 		.vendor        = "EMC",
 		.product       = "Invista",
 		.bl_product    = "LUNZ",
-		.pgpolicy      = MULTIBUS,
+		.pgpolicy      = GROUP_BY_PRIO,
 		.no_path_retry = 5,
+		.pgfailback    = -FAILBACK_IMMEDIATE,
 	},
 	{
 		/* XtremIO */
-- 
2.32.0