[stgt] tgt memory usage

[Raj Singh]

Fujita,

This is the first target and first LUN on this machine.

I can perform the following command with no issues and they complete
instantaneously (under a second with no to very little memory use):

tgtadm --lld iscsi --mode target --op new --tid=1 --targetname
volume-9c2637a7-1c47-41a7-89d3-86dddd8f9082

tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b
/dev/cinder-volumes/volume-9c2637a7-1c47-41a7-89d3-86dddd8f9082


But when I perform the following command I run out of memory after 3 -
4 mins (there are no LUN's or Target's on this machine when I run this
command):

tgt-admin --update
iqn.2010-10.org.openstack:volume-9c2637a7-1c47-41a7-89d3-86dddd8f9082



To fix this for now I upped the memory on my server from 2G to 12G.
Now when I run the tgt-admin --update command it completes after 8 -
10 mins (during this time the memory consumed by tgt-admin goes to
10G).

Not sure if this script should take up this much memory for starting a
single lun and target.


Regards,

Raj

On Tue, Jun 18, 2013 at 8:59 PM, FUJITA Tomonori
<fujita.tomonori at lab.ntt.co.jp> wrote:
> On Tue, 18 Jun 2013 18:26:46 -0700
> Raj Singh <rajtpd at gmail.com> wrote:
>
>> I am running the following command and it looks like the memory used
>> by tgt-admin spikes up to couple gigs and then the command exits with
>> "Out of Memory". Is this normal?
>>
>> root at controller:~# tgt-admin --update
>> iqn.2010-10.org.openstack:volume-36cc7df0-0030-4083-99c3-145fe28b7e4f
>> Out of memory!
>>
>>
>> I am running the following on a Ubuntu 2 vCPU, with 2 Gigs of memory:
>>
>> root at controller:~# uname -r
>> 3.5.0-23-generic
>> root at controller:~# tgtd -V
>> 1.0.17
>> root at controller:~#
>
> How many targets and luns do you set up?



-- 
Regards,

-Raj
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