multipath-tools: delete .minio from hwtable
authorXose Vazquez Perez <xose.vazquez@gmail.com>
Tue, 16 Aug 2016 12:38:52 +0000 (14:38 +0200)
committerChristophe Varoqui <christophe.varoqui@opensvc.com>
Tue, 16 Aug 2016 13:33:55 +0000 (15:33 +0200)
It's useless, default path_selector is service-time.
And document some aspects of round-robin.

Cc: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Cc: Jun’ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Benjamin Marzinski <bmarzins@redhat.com>
Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
Cc: device-mapper development <dm-devel@redhat.com>
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
libmultipath/hwtable.c
multipath/multipath.conf.5

index b74616b..11cf498 100644 (file)
@@ -79,7 +79,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = FAILBACK_UNDEF,
                .no_path_retry = 12,
-               .minio         = 100,
                .checker_name  = HP_SW,
                .prio_name     = PRIO_HP_SW,
        },
@@ -90,7 +89,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 12,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        {
@@ -100,7 +98,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 12,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        {
@@ -110,7 +107,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = MULTIBUS,
                .pgfailback    = FAILBACK_UNDEF,
                .no_path_retry = 18,
-               .minio         = 100,
        },
        {
                /* MSA2000 family with new firmware */
@@ -119,7 +115,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 18,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        {
@@ -129,7 +124,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 18,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        {
@@ -140,7 +134,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 12,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        {
@@ -158,7 +151,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 18,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        /*
@@ -520,7 +512,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = NO_PATH_RETRY_QUEUE,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        {
@@ -530,7 +521,6 @@ static struct hwentry default_hw[] = {
                .features      = "1 queue_if_no_path",
                .pgpolicy      = MULTIBUS,
                .pgfailback    = FAILBACK_UNDEF,
-               .minio         = 15,
        },
                /*
                 * IBM Power Virtual SCSI Devices
@@ -577,7 +567,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .flush_on_last_del = FLUSH_ENABLED,
-               .minio         = 128,
                .dev_loss      = MAX_DEV_LOSS_TMO,
                .prio_name     = PRIO_ONTAP,
        },
@@ -612,7 +601,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_SERIAL,
                .pgfailback    = FAILBACK_UNDEF,
                .no_path_retry = 30,
-               .minio         = 128,
        },
        /*
         * SGI
@@ -776,7 +764,6 @@ static struct hwentry default_hw[] = {
                .features      = "1 queue_if_no_path",
                .pgpolicy      = MULTIBUS,
                .pgfailback    = FAILBACK_UNDEF,
-               .minio         = 100,
        },
        /*
         * Intel
@@ -800,7 +787,6 @@ static struct hwentry default_hw[] = {
                .pgpolicy      = GROUP_BY_PRIO,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 12,
-               .minio         = 100,
                .prio_name     = PRIO_ALUA,
        },
        /*
index 55fde22..fd4b1f2 100644 (file)
@@ -7,7 +7,7 @@
 .\"
 .\" ----------------------------------------------------------------------------
 .
-.TH MULTIPATH.CONF 5 2016-08-07 "Linux"
+.TH MULTIPATH.CONF 5 2016-08-09 "Linux"
 .
 .
 .\" ----------------------------------------------------------------------------
@@ -163,7 +163,8 @@ kernel multipath target. There are three selector algorithms:
 .TP 12
 .I "round-robin 0"
 Loop through every path in the path group, sending the same amount of IO to
-each.
+each. Some aspects of behavior can be controlled with the attributes:
+\fIrr_min_io\fR, \fIrr_min_io_rq\fR and \fIrr_weight\fR.
 .TP
 .I "queue-length 0"
 Send the next bunch of IO down the path with the least amount of outstanding IO.
@@ -433,8 +434,9 @@ Default value is: \fBmanual\fR
 .
 .TP
 .B  rr_min_io
-The number of IO to route to a path before switching to the next in
-the same path group. This is only for BIO based multipath.
+Number of IO requests to route to a path before switching to the next in the
+same path group. This is only for \fIBlock I/O\fR(BIO) based multipath and 
+only apply to \fIround-robin\fR path_selector.
 .RS
 .TP
 Default value is: \fB1000\fR
@@ -443,8 +445,9 @@ Default value is: \fB1000\fR
 .
 .TP
 .B rr_min_io_rq
-The number of IO requests to route to a path before switching to the
-next in the same path group. This is only for request based multipath.
+Number of IO requests to route to a path before switching to the next in the
+same path group. This is only for \fIRequest\fR based multipath and
+only apply to \fIround-robin\fR path_selector.
 .RS
 .TP
 Default value is: \fB1\fR
@@ -467,11 +470,12 @@ Default value is: \fBmax\fR
 .
 .TP
 .B rr_weight
-If set to \fIpriorities\fR the multipath configurator will assign
-path weights as "path prio * rr_min_io". Possible values are
+If set to \fIpriorities\fR the multipath configurator will assign path weights
+as "path prio * rr_min_io". Possible values are
 .I priorities
 or
 .I uniform .
+Only apply to \fIround-robin\fR path_selector.
 .RS
 .TP
 Default value is: \fBuniform\fR