That's not quite how Ceph works. I recommend perusing some of the introductory documentation at ceph.com/docs, but in short: When you set up a ceph pool, you are specifying groups of hard drives which will be used together. When you create an RBD volume in a pool, you are saying "I want this volume to store its data within that pool of storage". When you write to your RBD volume, the data is split into chunks (4MB by default) and each chunk is independently placed on OSDs in the appropriate pool. So when you have a large RBD volume, you can expect part of its data to be stored on every OSD in the pool. -Greg
On Tuesday, April 29, 2014, <yalla.gnan.ku...@accenture.com> wrote: > Hi All, > > > > I have created a ceph volume in a pool which I have defined. A hard drive > is also attached to > > the ceph node. How do we know on which hard drive ceph created this > volume on ? > > What is its path ? > > > > > > Thanks > > Kumar > > ------------------------------ > > This message is for the designated recipient only and may contain > privileged, proprietary, or otherwise confidential information. If you have > received it in error, please notify the sender immediately and delete the > original. Any other use of the e-mail by you is prohibited. Where allowed > by local law, electronic communications with Accenture and its affiliates, > including e-mail and instant messaging (including content), may be scanned > by our systems for the purposes of information security and assessment of > internal compliance with Accenture policy. > > ______________________________________________________________________________________ > > www.accenture.com > -- Software Engineer #42 @ http://inktank.com | http://ceph.com
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