Hi,
I have configured multipath on 4 nodes in my Intel Modular Server. The problem is that when I stress test one of the storage control module while the system is running, I get different results each time.
Some times, multipath is working and the path is switch automatically, but some times it does not.
Configuration is the same on each of the 4 nodes, but multipath works differently on each node when I pull out SCMs.
I have attached outputs of configuration bellow.
Can someone help?
Thanks,
Emmanuel
I have configured multipath on 4 nodes in my Intel Modular Server. The problem is that when I stress test one of the storage control module while the system is running, I get different results each time.
Some times, multipath is working and the path is switch automatically, but some times it does not.
Configuration is the same on each of the 4 nodes, but multipath works differently on each node when I pull out SCMs.
I have attached outputs of configuration bellow.
Can someone help?
uname -aLinux pve221 4.15.18-9-pve #1 SMP PVE 4.15.18-30 (Thu, 15 Nov 2018 13:32:46 +0100) x86_64 GNU/Linux/etc/multipath.conf
defaults {
polling_interval 5
fast_io_fail_tmo 5
dev_loss_tmo 10
checker_timeout 15
user_friendly_names no
}
blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^(hd|xvd)[a-z][[0-9]*]"
devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
}
devices {
device {
vendor "Intel"
roduct "Multi-Flex"
path_grouping_policy "group_by_prio"
uid_attribute ID_SERIAL
prio "alua"
path_checker tur
path_selector "round-robin 0"
hardware_handler "1 alua"
failback 30
rr_weight uniform
rr_min_io 100
no_path_retry queue
features "1 queue_if_no_path"
retain_attached_hw_handler no
product_blacklist "VTrak V‐LUN"
}
}
multipath -ll
222a0000155aa8365 dm-5 Intel,Multi-Flex
size=2.6T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| `- 0:0:0:2 sdc 8:32 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 0:0:1:2 sdf 8:80 active ready running
222b6000155529315 dm-0 Intel,Multi-Flex
size=60G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| `- 0:0:0:0 sda 8:0 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 0:0:1:0 sdd 8:48 active ready running
222400001552becb2 dm-1 Intel,Multi-Flex
size=2.6T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='round-robin 0' prio=50 status=active
| `- 0:0:0:1 sdb 8:16 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
`- 0:0:1:1 sde 8:64 active ready running
Thanks,
Emmanuel
