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Full Discussion: device-mapper-multipath path [undef]
Operating Systems Linux Red Hat device-mapper-multipath path [undef] Post 302377089 by chilonnb on Thursday 3rd of December 2009 06:04:34 AM
Old 12-03-2009
probleme multipath
bonjour,
j'ai deux serveur SUN equipé par RHEL5.2 x86_64 :
SRV1 : 01FC mono + 01FC mono (qlogic)
SRV2 : 01FC dual (qlogic)

ça fonctionnait correctement et après une certaine période J'ai eu un problème lors du démarrage de SRV2.


udevd-event[3580]: wait_for_sysfs: waiting for '/sys/devices/pci0000:00/0000:00:0d.0/0000:04:00.0/host3/target3:0:0/3:0:0:0/ioerr_cnt' failed

Le fstab est correct sur SRV2:
/dev/dm-2 /data auto defaults 1 2
/dev/dm-3 /home auto defaults 1 2

Une fois SRV2 est démarrer, le /home est vide. Il faut que je fais mount /dev/dm-3 /home (ça se monte pas automatiquement)

Je trouve une différence entre SRV1 et SRV2 lorsque je fais : multipath -ll -v2

SRV1 :
mpath2 (3600a0b80004946b80000083b4a4a0137) dm-3 SUN,LCSM100_F
[size=305G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
\_ 1:0:0:1 sdf 8:80 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:0:1 sdd 8:48 [active][ghost]
mpath1 (3600a0b8000493fb6000008674a4a0130) dm-2 SUN,LCSM100_F
[size=240G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
\_ 2:0:0:0 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 1:0:0:0 sdb 8:16 [active][ghost]

SRV2 :
mpath17 (3600a0b80004946b80000083b4a4a0137) dm-2 SUN,LCSM100_F
[size=305G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
\_ 3:0:0:1 sdd 8:48 [active][ready]
mpath16 (3600a0b8000493fb6000008674a4a0130) dm-3 SUN,LCSM100_F
[size=240G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=0][active]
\_ 3:0:0:0 sdc 8:32 [active][ghost]

c'est un problème de paths.



comment je peux résoudre ça.


Merci d'avance.
zeus2_old_multipath.doc (547.5 KB) 
 

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LEARN ABOUT DEBIAN

trafgen

trafgen(8)							netsniff-ng-toolkit							trafgen(8)

NAME

       trafgen - a high-performance zero-copy network packet generator

SYNOPSIS

       trafgen	 [-d|--dev <netdev>][-c|--conf <file>][-J|--jumbo-support]	[-x|--interactive][-n|--num <uint>][-r|--rand][-t|--gap <usec>]
	    [-S|--ring-size <size>][-k|--kernel-pull <usec>][-b|--bind-cpu <cpu>]      [-B|--unbind-cpu
       <cpu>][-H|--prio-high][-Q|--notouch-irq][-v|--version]	   [-h|--help]

DESCRIPTION

       A high-performance network traffic generator that uses the zero-copy TX_RING for network I/O. For instance, on comodity Gigabit hardware up
       to 1,488,095 pps 64 Byte pps have been achieved with trafgen.

OPTIONS

       trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0
	   Use packet configuration trafgen.txf, eth0 as transmission device and CPU0 for binding the process.

OPTIONS

       -h|--help
	   Print help text and lists all options.

       -v|--version
	   Print version.

       -d|--dev <netdev>
	   Device for transmission i.e., eth0.

       -c|--conf <conf>
	   Path to packet configuration file.

       -x|--interactive
	   Start trafgen in interactive mode.

       -J|--jumbo-support
	   Support for 64KB Super Jumbo Frames

       -n|--num <uint>
	   Number of packets to generate before exiting.  0 means forever until SIGINT.

       -r|--rand
	   Randomize packet selection process instead of round-robin.

       -t|--gap <uint>
	   Interpacket gap in microseconds.

       -S|--ring-size <size>
	   Manually set ring size to <size>: mmap space in KB/MB/GB.

       -k|--kernel-pull <uint>
	   Kernel pull from user interval in microseconds.  Default value is 10 microseconds.

       -b|--bind-cpu <cpu>
	   Bind to specific CPU (or CPU-range).

       -B|--unbind-cpu <cpu>
	   Forbid to use specific CPU (or CPU-range).

       -H|--prio-high
	   Make this high priority process.

       -Q|--notouch-irq
	   Do not touch IRQ CPU affinity of NIC.

EXAMPLES

       Generate traffic defined in trafgen.txf on eth0 using CPU 0
	   trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0

       Generate traffic on eth0 using CPU 0, wait 100 us between packets
	   trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0 --gap 100

       Generate 100,000 packet on eth0 using CPU 0
	   trafgen --dev eth0 --conf trafgen.txf --bind-cpu 0 --num 100000

AUTHOR

       Written by Daniel Borkmann <daniel@netsniff-ng.org>

DOCUMENTATION

       Documentation by Emmanuel Roullit <emmanuel@netsniff-ng.org>

BUGS

       Please report bugs to <bugs@netsniff-ng.org>

								    2012-06-29								trafgen(8)
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