[openstack-dev] [nova]Question about Ephemeral/swap disk and flavor
glongwave at gmail.com
Tue Mar 11 09:04:57 UTC 2014
2014-03-11 17:01 GMT+08:00 ChangBo Guo <glongwave at gmail.com>:
> 2014-03-11 16:28 GMT+08:00 Chen CH Ji <jichenjc at cn.ibm.com>:
>> We are trying to fix some eph disk related bugs and also
>> considering our private driver implementation based for eph disk ,so this
>> is not a usage question ,instead, it's a development question
>> I have some questions related "ephemeral_gb" in flavor and nova
>> boot option "--ephemeral", and I failed to find out descriptions in
>> existing documents:
>> 1. If I boot a new instance using flavor with "ephemeral_gb" defined
>> as 20 G, and no "--ephemeral" specified, does the new instance have a 20G
>> additional ephemeral disk after booted?
>> ephemeral_gb means the maximum value allowed , need option --ephemeral
> to provide actual value, otherwise, no ephemeral disk is created. The swap
> option has same behavior with ephemeral_gb
Update: if without the option --ephemeral , the size in flavor will be
>> 2. The flavor has 20 G ephemeral disk defined, but specified two 5 G
>> ephemeral disk through "--ephemeral" option in nova boot cmd, what will
>> happen to the new instance? Get one 20G additional ephemeral? Or two 5 G
>> ephemeral disks instead?
>> 3. If the answer to question 2 is "two 5 G ephemeral disks", what
>> will happen if resize this instance to a flavor with "ephemeral_gb" defined
>> as 40 G?
>> 4. I think the "ephemeral_gb" in flavor means maximum disk size you
>> can specified, is this understanding correct?
>> 5. Also, above question can be applied to swap disk
>> Best Regards!
>> Kevin (Chen) Ji 纪 晨
>> Engineer, zVM Development, CSTL
>> Notes: Chen CH Ji/China/IBM at IBMCN Internet: jichenjc at cn.ibm.com
>> Phone: +86-10-82454158
>> Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District,
>> Beijing 100193, PRC
>> OpenStack-dev mailing list
>> OpenStack-dev at lists.openstack.org
> ChangBo Guo(gcb)
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