[openstack-dev] [nova]Question about Ephemeral/swap disk and flavor
Chen CH Ji
jichenjc at cn.ibm.com
Tue Mar 11 08:28:18 UTC 2014
Hi
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?
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
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