[openstack-dev] [Cinder] Question about the magic 100M when creating zero-size volume

2014-04-29 Thread Zhangleiqiang (Trump) 
Hi, all:

I find in some of the cinder backend volume drivers, there are codes in 
create_volume as follows:

#cinder.volume.drivers.lvm
def _sizestr(self, size_in_g):
if int(size_in_g) == 0:
return '100m'

Similar codes also exist in ibm.gpfs, san.hp.hp_lefthand_cliq_proxy, 
san.solaris and huawei.ssh_common. I wonder why the 100M is used here, from 
the git log I cannot find useful info.

Thanks.


--
zhangleiqiang (Trump)

Best Regards



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Re: [openstack-dev] [Cinder] Question about the magic 100M when creating zero-size volume

2014-04-29 Thread Vishvananda Ishaya 
This was added long ago to support testing environments without a lot of disk 
space.

Vish

On Apr 29, 2014, at 12:12 AM, Zhangleiqiang (Trump) zhangleiqi...@huawei.com 
wrote:

 Hi, all:
   
   I find in some of the cinder backend volume drivers, there are codes in 
 create_volume as follows:
   
   #cinder.volume.drivers.lvm
   def _sizestr(self, size_in_g):
if int(size_in_g) == 0:
   return '100m'
 
   Similar codes also exist in ibm.gpfs, san.hp.hp_lefthand_cliq_proxy, 
 san.solaris and huawei.ssh_common. I wonder why the 100M is used here, from 
 the git log I cannot find useful info.
 
   Thanks.
 
 
 --
 zhangleiqiang (Trump)
 
 Best Regards
 
 
 
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 OpenStack-dev@lists.openstack.org
 http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev



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