RFE: new NVMe configs from several vendors

[xosevp]

• HPE Alletra 9000 NVMe (page 53): https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=a00115289en_us (website some time is broke) or https://support.hpe.com/hpesc/public/docDisplay?docId=sd00001334en_us&page=GUID-551FCC2F-D8EA-405B-B9DC-2E66C2AE8608.html

vendor "NVME"
product "HPE Alletra"
path_grouping_policy multibus
path_selector "round-robin 0"
path_checker "none"
prio const
failback immediate
rr_weight uniform
no_path_retry "queue"
rr_min_io_rq 1
fast_io_fail_tmo 10
dev_loss_tmo 14

Translated to code:

                /* Alletra 9000 NVMe */
                .vendor        = "NVME",
                .product       = "HPE Alletra",
                .pgpolicy      = MULTIBUS,
                .no_path_retry = NO_PATH_RETRY_QUEUE,

[xosevp]

• NetApp e-series (page 12): https://docs.netapp.com/us-en/e-series/pdfs/sidebar/NVMe_over_Fibre_Channel_setup.pdf

vendor "NVME"
product "NetApp E-Series*"
path_grouping_policy group_by_prio
failback immediate
no_path_retry 30

Translated to code:

                 /* E-Series NVMe */
                .vendor        = "NVME",
                .product       = "NetApp E-Series",
                .pgpolicy      = GROUP_BY_PRIO,
                .prio_name     = PRIO_ANA,
                .pgfailback    = -FAILBACK_IMMEDIATE,
                .no_path_retry = 30,

[xosevp]

• Huawei OceanStor (config removed in latest edition): https://download.huawei.com/edownload/e/download.do?actionFlag=download&nid=EDOC1100154490&partNo=6001&mid=SUPE_DOC&_t=1612885603000
  Old version (page 61-62): https://drive.google.com/file/d/1c5RK4GXX7ofZBFxTtZ_IN1qHyIjw5eR1

vendor "NVME"
product "Huawei-XSG1"
uid_attribute "ID_WWN"
no_path_retry 12
rr_min_io_rq 1
prio "const"
path_grouping_policy multibus
path_checker "directio"
failback immediate
fast_io_fail_tmo 0
retain_attached_hw_handler "no"

Translated to code:

                /* OceanStor NVMe */
                .vendor        = "NVME",
                .product       = "Huawei-XSG1",
                .pgpolicy      = MULTIBUS,
                .checker_name  = DIRECTIO,
                .no_path_retry = 12,

[mwilck]

• checker_name is required if you want path checking (default for NVME is NONE)
• for prio_name, multipathd will check if a path supports ANA and use it if supported, falling back to CONST otherwise. So setting CONST is only necessary if this autodetection yields wrong results for the array. I don't know if that's the case for OceanStor
• setting fast_io_fail is unnecessary for NVMe, we support it only for SCSI (like dev_loss_tmo), and this is unlikely to change any time soon.

[xosevp]

• IBM FlashSystem (TMS RamSan): https://www.ibm.com/docs/en/flashsystem-900/1.6.1?topic=configurations-multipathing-information-linux

vendor                  "NVMe"
product                 "FlashSystem-9840"
path_selector           "service-time 0"
path_grouping_policy    multibus
path_checker            tur
rr_min_io_rq            4         
rr_weight               uniform
no_path_retry           fail
failback                immediate
dev_loss_tmo            300
fast_io_fail_tmo        25
user_friendly_names     yes

Translated to code:

		/* FlashSystem(RamSan) NVMe */
		.vendor        = "NVMe",
		.product       = "FlashSystem",
		.pgpolicy      = MULTIBUS,
		.no_path_retry = NO_PATH_RETRY_FAIL,

[xosevp]

• IBM FlashSystem (Storwize/SVC): https://www.ibm.com/docs/en/flashsystem-7x00/8.5.x?topic=system-multipath-configuration-fc-nvme-hosts

vendor                  "NVME"
product                 "IBM     2145"
path_grouping_policy    "multibus"
path_selector           "round-robin 0"
prio                    "const"
path_checker            "none"
failback                "immediate"
no_path_retry           "queue"
rr_weight               uniform
rr_min_io_rq            "1"
fast_io_fail_tmo        15
dev_loss_tmo            600

Translated to code:

		/* FlashSystem(Storwize/SVC) NVMe */
		.vendor        = "NVME",
		.product       = "IBM[ ]+2145",
		.pgpolicy      = MULTIBUS,
		.no_path_retry = NO_PATH_RETRY_QUEUE,

[xosevp]

• Pure Storage FlashArray (e-mail from vendor)

vendor                      "NVME"
product                     "Pure Storage FlashArray"
path_selector               "queue-length 0"
path_grouping_policy        multibus
fast_io_fail_tmo            10
user_friendly_names         no
no_path_retry               10
features                    0
dev_loss_tmo                60

Translated to code:

		/* FlashArray NVMe */
		.vendor        = "NVME",
		.product       = "Pure Storage FlashArray",
		.pgpolicy      = MULTIBUS,
		.no_path_retry = 10,

[xosevp]

• Dell EMC PowerStore: https://www.dell.com/support/manuals/es-es/powerstore-5000/pwrstr-hcg/configuring-device-mapper-multipathing-dm-multipathing-with-mvme-fc?guid=guid-73d9ff91-59db-4f5f-88d9-020d092450e9&lang=en-us

vendor               .*
product              dellemc-powerstore
uid_attribute        ID_WWN
prio                 ana             
failback             immediate
path_grouping_policy "group_by_prio" 
# path_checker       directio        
path_selector        "queue-length 0"
detect_prio          "yes"
fast_io_fail_tmo     15
no_path_retry        3
rr_min_io_rq         1

Translated to code:

		/* PowerStore NVMe */
		.vendor        = ".*",
		.product       = "dellemc-powerstore",
		.pgpolicy      = GROUP_BY_PRIO,
		.prio_name     = PRIO_ANA,
		.pgfailback    = -FAILBACK_IMMEDIATE,
		.no_path_retry = 3,

[mwilck]

@xosevp, what's the status here? I'm preparing a 0.9.0 submission. Do you need further input from anyone?

[xosevp]

DONE.