[pve-devel] ZFS plugin: Patch to solve issue with nexenta

Alexandre DERUMIER aderumier at odiso.com
Wed Nov 6 09:34:25 CET 2013


>>Maybe using dtrace or strace could give you ideas? 
Good idea!


I have found an api to sync lun, maybe it can help

http://www.nexenta.com/static/NexentaStor-API.html#com.nexenta.nms.Lun::lunsync 


(because lun mapping though nexenta api can be slow too with a big number of lun, I'll to no use them, but only do a resync)



----- Mail original ----- 

De: "Michael Rasmussen" <mir at datanom.net> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mercredi 6 Novembre 2013 08:48:33 
Objet: Re: [pve-devel] ZFS plugin: Patch to solve issue with nexenta 

Maybe using dtrace or strace could give you ideas? 


Alexandre DERUMIER <aderumier at odiso.com> wrote: 

Hi, 

the patch seem to generate now similar guid than nexenta 

600144f0a06f0700000055428993c0c1  34359738368          /dev/zvol/rdsk/MainPool/vm-296-disk-9 -> generate with last patch 
600144f0a06f07000000558811e9da14  34359738368          /dev/zvol/rdsk/MainPool/vm-296-disk-8 
600144f0a06f070000005c6f449515d5  34359738368          /dev/zvol/rdsk/MainPool/vm-296-disk-7 
600144f0a26587000000519e535b0001  34359738368          /dev/zvol/rdsk/MainPool/vm-277-disk-1 
600144f0a265870000005242d93c0001  34359738368          /dev/zvol/rdsk/MainPool/vm-291-disk-1-> generate with nexenta 
600144f0a265870000005242dafb0003  34359738368          /dev/zvol/rdsk/MainPool/base-292-disk-1 -> generate with nexenta 
600144f0a26587000000527922280001  34359738368          /dev/zvol/rdsk/MainPool/vm-296-disk-5 
600144f675f1c980c38752a0647ba5e6  34359738368          /dev/zvol/rdsk/MainPool/vm-296-disk-6 -> generate with
previous patch 
600144ff713ed897226e5d64732418ff  34359738368          /dev/zvol/rdsk/MainPool/vm-292-disk-3 -> generate with previous patch 

But It doesn't help for the gui error 

My understanding is that nexenta generate a cache somewhere, and something it's not filled 

some log: 

Nov 06 17:03:09 (1:1.5) EXCEPTION: ObjectNotFound: ScsiDiskContainer::list_lun_mapping_entries(MainPool/vm-296-disk-7): Unable to locate the specified zvol 'MainPool/vm-296-disk-7' 

2013-11-06 17:10:08,255 nza ERROR com.nexenta.nms::/Root/Stmf/ScsiDisk::list_lun_mapping_entries(dbus.String(u'MainPool/vm-296-disk-9')): com.nexenta.nms.ObjectNotFound: Unable to locate the specified zvol 'MainPool/vm-296-disk-9' 



after waiting some minutes, or rlauching the nms service (webgui service) (#svcadm restart nms) 

It's working again 

(The module is in python, but closed sources, compiled .pyc, I can't see w
 hat it
is doing) 


restarting nms stop the web gui for some minutes, 

but in the logs it's showing: 
Nov 06 17:28:15 Starting... 
Nov 06 17:28:15 Syncing devices... 
Nov 06 17:28:22 Syncing LUNs... 

So I think it's rebuild the luns cache or something similar 


I'll try to find an easy way to reload this cache. (through ssh command) 


----- Mail original ----- 

De: "Michael Rasmussen" <mir at datanom.net> 
À: "Alexandre DERUMIER" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
Envoyé: Mardi 5 Novembre 2013 19:28:52 
Objet: Re: [pve-devel] ZFS plugin: Patch to solve issue with nexenta 

On Tue, 05 Nov 2013 18:45:34 +0100 (CET) 
Alexandre DERUMIER <aderumier at odiso.com> wrote: 


<blockquote>
I'll try tomorrow ! 


If the sol
 ution
works it will cause no problems to only use 11 digits 
when naming a lun since max luns per target is limited to 2^14 or 16384 
and using 11 hex digits is an astronomic large number 11^16 

</blockquote>

-- 
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