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ISCSI multipathing Ubuntu to MSA2313i

Hello.

I want to loadbalancing a ISCSI connection against my MSA2312i ISCSI SAN that is SCSI-3 ALUA

My problem is that all my traffic is going over one interface,

Is there anyone now how I should write my multipath.conf to make my roundrobin loadbalancing work..

(I got it work once but i dont really know how i did.)

all traffic is on the same LAN but separated by static routes.

trunkated routing table:
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
xx
xx
101.150.1.101 0.0.0.0 255.255.255.255 UH 0 0 0 eth3
101.150.1.102 0.0.0.0 255.255.255.255 UH 0 0 0 eth5
101.150.1.103 0.0.0.0 255.255.255.255 UH 0 0 0 eth3
101.150.1.104 0.0.0.0 255.255.255.255 UH 0 0 0 eth5

multipath -ll
data (3600c0ff00011dfd55a24e95201000000) dm-1 HP,MSA2312i
size=7.3T features='1 queue_if_no_path' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=130 status=active
| |- 6:0:0:1 sde 8:64 active ready running
| `- 4:0:0:1 sdd 8:48 active ready running
`-+- policy='round-robin 0' prio=10 status=enabled
|- 3:0:0:1 sdb 8:16 active ready running
`- 5:0:0:1 sdc 8:32 active ready running

SOLUTION

Mazdajai

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Sandy

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Daniel-San

ASKER

Thanx for you Answers!

No I have multiple prio options in my config, I wish to clean up this config file, but I dont really now what options I DO need and what I dont need. I only have the MSA connected.

Can you guys please advise?

cat /etc/multipath.conf
      defaults {
            udev_dir /dev
            polling_interval 10
            path_selector "round-robin 0"
            path_grouping_policy multibus
            getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
            prio alua
            path_checker readsector0
            rr_min_io 100
            max_fds 8192
            rr_weight priorities
            failback immediate
            no_path_retry fail
            user_friendly_names yes
      }

      blacklist {
            # Blacklist by WWID
            wwid "*"

      # Blacklist by device name
             devnode "^sda"
      }

blacklist_exceptions {
      wwid "3600c0ff00011dfd55a24e95201000000"
      }

      multipaths {
       multipath {
wwid 3600c0ff00011dfd55a24e95201000000
alias data
}
}
      device {
            vendor "HP"
            product "MSA2312fc|MSA2324fc|MSA2312i|MSA2324i|MSA2000s VOLUME"
            path_grouping_policy group_by_prio
            getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
            path_selector "round-robin 0"
            path_checker tur
            features "0"
            hardware_handler "0"
            prio_callout "/sbin/mpath_prio_alua /dev/%n"
            failback immediate
            rr_weight uniform
            no_path_retry 18
            rr_min_io 100
      }

/Daniel

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Sandy

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Mazdajai

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Daniel-San

ASKER

Ok, thx all for your answers! Appreciated!

Mazdajai, Is reload an online command? Or will I loose contact with volumes so I need to shut I/O down first?

Regards
Daniel

SOLUTION

Mazdajai

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ASKER CERTIFIED SOLUTION

Sandy

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Daniel-San

ASKER

Ok, Thank you guys!
/Daniel