openstack team mailing list archive

[John Griffith <john.griffith@xxxxxxxxxxxxx>]

On Fri, Jan 11, 2013 at 3:47 AM, Sajid Akhtar <mail2akhtar@xxxxxxxxx> wrote:

> Hi Yonny,
>
> OpenStack modules such as Cinder are dependent on the Vendor driver on
> Openstack to achieve LUN provisioning and maintenance operations on the
> respective storage controller.
>
> Object Storage (Swift)
>
> OpenStack Object Storage (Swift)<http://www.openstack.org/software/openstack-storage/> is
> a massively scalable redundant storage system. Objects and files are
> written to multiple disk drives spread throughout servers in the data
> center, with the OpenStack software responsible for ensuring data
> replication and integrity across the cluster. Storage clusters scale
> horizontally simply by adding new servers. Should a server or hard drive
> fail, OpenStack replicates its content from other active nodes to new
> locations in the cluster. Because OpenStack uses software logic to ensure
> data replication and distribution across different devices, inexpensive
> commodity hard drives and servers can be used.
>
> In Aug 2009, Rackspace started the development of Swift, which is a
> complete replacement for the *Cloud Files* product. The initial
> development team consists of nine developers. [14]<https://en.wikipedia.org/wiki/OpenStack#cite_note-14>
>  [edit<https://en.wikipedia.org/w/index.php?title=OpenStack&action=edit&section=5>
> ]Block Storage (Cinder)
>
> OpenStack Block Storage (Cinder)<http://www.openstack.org/software/openstack-storage/> provides
> persistent block level storage devices for use with OpenStack compute
> instances. The block storage system manages the creation, attaching and
> detaching of the block devices to servers. Block storage volumes are fully
> integrated into OpenStack Compute and the Dashboard allowing for cloud
> users to manage their own storage needs. In addition to using simple Linux
> server storage, it has unified storage support for numerous storage
> platforms including Ceph <https://en.wikipedia.org/wiki/Ceph>, NetApp<https://en.wikipedia.org/wiki/NetApp>
> , Nexenta <https://en.wikipedia.org/wiki/Nexenta> and SolidFire<https://en.wikipedia.org/w/index.php?title=SolidFire&action=edit&redlink=1>.
> Block storage is appropriate for performance sensitive scenarios such as
> database storage, expandable file systems, or providing a server with
> access to raw block level storage. Snapshot management provides powerful
> functionality for backing up data stored on block storage volumes.
> Snapshots can be restored or used to create a new block storage volume.
>
> For more information you may refer to
> https://en.wikipedia.org/wiki/OpenStack
>
> http://docs.openstack.org/developer/swift/#
>
> ---------- Forwarded message ----------
> From: Yonny Luis Leyva Suárez <yllsuarez@xxxxxxxxxxx>
> Date: Fri, Jan 11, 2013 at 3:10 AM
> Subject: [Openstack] [Cinder]
> To: openstack@xxxxxxxxxxxxxxxxxxx
>
>
>  Hello,
>
> I have a big doubt.
>
> Cinder and Swift, are 2 separated services, but openstack talk about
> Storage controller.
>
> What Cinder and Switft does ?
> Can i use two NAS iSCSI with separated LUN for those services or need
> servers for Swift?
>
> Thanks a lot
>
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>
>
>
> --
> With Regards
> Sajid Akhtar
> Twitter: @mail2fashion
>
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>
> Just to add a little to Sajid's response, there is of course a default LVM
implementation for Cinder/Block Storage in addition to the supported back
ends that were mentioned.

John