VSCSI
When working with VSCSI mode, I always find the lsmap -all output to be a real pain in the *ss, because of all the formatting, and the scrolling you have to do to find your lpar when you don’t know which vadapter is related to the lpar you’re looking for :
SVSA Physloc Client Partition ID |
--------------- -------------------------------------------- ------------------ |
vhost4 U9117.MMB.999BCP-V2-C8 0x00000008 |
Physloc U78C0.001.DBJ1531-P2-C5-T1-W50060F80164D0B26-L17000000000000 |
Physloc U78C0.001.DBJ1531-P2-C5-T1-W50060F80164D0B26-L18000000000000 |
Physloc U78C0.001.DBJ1531-P2-C5-T1-W50060E80164DFB26-L16000000000000 |
…170 lines … Jeez…
To fix this, I found this nice combination of options with lsmap command :
# lsmap -all -field vtd svsa -fmt : |
vhost0:d7f1_lpar2:d7f1n1_lpar2:d7f1n2_lpar2:r7f1_lpar2:t7f1_lpar2 |
vhost1:d7f1_lpar3:d7f1n1_lpar3:d7f1n2_lpar3:d7f1n3_lpar3:d7f1n4_lpar3 |
vhost2:d7f1_lpar4:d7f1n1_lpar4:r7f1_lpar4:t7f1_lpar4 |
vhost3:d7f1_lpar5:d7f1n1_lpar5:d7f1n2_lpar5:r7f1_lpar5:t7f1_lpar5 |
vhost4:d7f1_lpar1:d7f1n1_lpar1:r7f1_lpar1 |
No need to run wc -l here, you’ll have only the same number of lines as the number of vadapters (5 lines here) .
What about NPIV ?The problem doesn’t lie within the VTDs, but here we need sometimes to get to the point quickly: is my Virtual server correctly mapped to the VIO’s physical FC adapter? What’s the distribution between all my VIO’s adapters ? How many hosts are connected ?
Basic line to display every VFC adapter and the attached hosts
# lsmap -all -npiv -field "FC name" Status Name ClntName -fmt : |
vfchost0:lpar1:fcs0:LOGGED_IN |
vfchost1:lpar2:fcs0:LOGGED_IN |
vfchost2:lpar3:fcs0:LOGGED_IN |
vfchost3:lpar4:fcs0:LOGGED_IN |
vfchost4:lpar5:fcs0:LOGGED_IN |
vfchost5::fcs1:NOT_LOGGED_IN |
See ? 5 lpars actually talking through the VIO’s physical adapter fcs0, and one mapped to fcs1, but not active at this moment.
Which lpars are not mapped to a physical adapter# lsmap -all -npiv -field "FC name" Status Name ClntName -fmt : |grep -v fcs |
vfchost23: : :NOT_LOGGED_IN |
Here we only have one and we don’t know its name, because it isn’t mapped at all, maybe we’ll need the ClntID field to determine which lpar we’re talking about.
Which lpar are not connected (maybe shut down)lsmap -all -npiv -field "FC name" Status Name ClntName -fmt : |grep NOT|grep fcs |
vfchost20: :fcs0:NOT_LOGGED_IN |
Here the mapping has been made (because we can see that fcs0 is configured on this vfchost) but the lpar is not active.
What is the FCS distribution on your VIO Server ?# /usr/ios/cli/ioscli lsmap -all -npiv -field "FC name" -fmt : | sort -n | uniq -c |
As you can see, the distribution is far from perfect … we have 22 hosts mapped to fcs0, although only half a dozen hosts are mapped on each other adapter …
Then fcs0 is having much much more activity than the other FC adapters! It is bad, knowing that we have 4 FC adapters with 8GB/s bandwitdth available… and we’re really actually using only one…
Note that there is also one port not logged_in (first blank line on the previous output).
About that …
There is a recent improvement with the latest HMC microcode and VIO release 2.2.2.1, which enables you to choose the destination FC adapter when you achieve live partition migration (before that update, no matter what you do, if you migrate a lpar, you will always be mapped to fcs0, even if you have 8 ou 16 FC adapters. It is really a huge improvement for us, and I guess for you too )
My friend at chmod666.org just wrote a nice post about that, please pay him a visit, he’s worth the trip : http://chmod666.org/index.php/improved-control-for-live-partition-mobility-choose-your-destination-fibre-channel-port/
Bonus
Hint : you can also check that easily by issuing the lsnports command, just look at the « aports » number (43 aports with 64 tports means that there are 64-43=21+1 mapped but not logged in = 22 hosts on fcs0)
name physloc fabric tports aports swwpns awwpns |
fcs0 U5803.001.9SS99BC-P2-C6-T1 1 64 43 2048 1967 |
fcs1 U5803.001.9SS99BC-P2-C6-T2 1 64 58 2048 2030 |
fcs4 U5803.001.9SS99BC-P2-C8-T1 1 64 55 2048 2017 |
fcs5 U5803.001.9SS99BC-P2-C8-T2 1 64 59 2048 2033 |
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