Hi,
I use multipath tools to manage the multiple ways through the SAN connected
via FC. The server sees two paths per LUN. There are 15 LUNs presented to the
server.
I upgraded two server to SLES 11, installed latest patches, running kernel:
Linux server1 2.6.27.29-0.1-xen #1 SMP 2009-08-15 17:53:59 +0200 x86_64 x86_64
x86_64 GNU/Linux
multipath-tools-0.4.8-40.4.1
There I recognized a fairly large amount of memory used by multipathd:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5367 root RT 0 238m 140m 2804 S 0 28.1 0:34.70 multipathd
I see the huge memory consumption on both of the servers.
On a different server, not yet upgraded, running SLES 10 SP2, with different
SAN storages applied, there I run kernel:
Linux server2 2.6.16.60-0.34-xen #1 SMP Fri Jan 16 14:59:01 UTC 2009 x86_64
x86_64 x86_64 GNU/Linux
with multipath tools:
multipath-tools-0.4.7-34.40
There I have 20 LUNs presented, and the server sees 4 paths per LUN, I in top
a much fewer memory consumption:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4796 root RT 0 11928 4808 2220 S 0 1.6 0:01.37 multipathd
However, both of the servers running SLES 11 work fine so far, no "errors"
recognized. I still wonder whether the large memory consumption is correct, as
I expected sth. similar as on the SLES10 SP2 hosts.
Below the configuration file I use on the SLES 11 servers.
If I need to provide more information, please let me know.
cheers
Sebastian
/etc/init.d/multipath.conf file on the SLES 11 servers.
defaults {
udev_dir /dev
verbosity 2
polling_interval 10
selector "round-robin 0"
path_grouping_policy group_by_serial
getuid_callout "/lib/udev/scsi_id -g -u -d /dev/%n"
path_checker tur
rr_min_io 100
max_fds 8192
rr_weight priorities
failback immediate
no_path_retry fail
user_friendly_names yes
}
blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*|sda"
devnode "^hd[a-z][[0-9]*]"
devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
}
blacklist_exceptions {
devnode "^sda[a-z]+"
}
multipaths {
multipath {
wwid 3600508b4001074ab0000c000014e0000
alias ONE
}
multipath {
wwid 3600508b4001074ab0000c000014b0000
alias TWO
}
multipath {
wwid 3600508b4001074ab0000c00001960000
alias THREE
}
multipath {
wwid 3600508b4001074ab0000c00001be0000
alias FOUR
}
multipath {
wwid 3600a0b800048b31000000fdc4a0809ff
alias FIVE
}
multipath {
wwid 3600a0b800048b31000000fb949f9627c
alias SIX
}
multipath {
wwid 3600a0b800048b31000000fc249f96349
alias SEVEN
}
multipath {
wwid 3600a0b800048b31000000fbc49f962b0
alias EIGHT
}
multipath {
wwid 3600a0b800048b31000000fc049f96308
alias NINE
}
multipath {
wwid 3600508b4001074ab0000c00000a70000
alias TEN
}
multipath {
wwid 3600a0b800048b310000017c64a48ee34
alias ELEVEN
}
multipath {
wwid 3600a0b800048b310000017c44a48ec5a
alias TWELVE
}
multipath {
wwid 3600a0b800048b310000017a04a4058d0
alias THIRTEEN
}
multipath {
wwid 3600a0b800048b3100000179d4a40589e
alias FOURTEEN
}
multipath {
wwid 3600a0b800048b310000017c94a48ee57
alias FIVETEEN
}
}
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