Re: [ceph-users] Is Ceph a provider of block device too ?
On 11/21/2013 12:52 PM, Gregory Farnum wrote: If you want a logically distinct copy (? this seems to be what Dimitri is referring to with adding a 3rd DRBD copy on another node) Disclaimer: I haven't done stacked drbd, this is from my reading of the fine manual -- I was referring to stacked setup where you make a drbd raid-1 w/ 2 hosts and then a drbd raid-1 w/ the that drbd device and another host. I don't believe drbd can keep 3 replicas any other way -- unlike ceph, obviously. -- Dimitri Maziuk Programmer/sysadmin BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu signature.asc Description: OpenPGP digital signature ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] Is Ceph a provider of block device too ?
Is this statement accurate? As I understand DRBD, you can replicate online block devices reliably, but with Ceph the replication for RBD images requires that the file system be offline. Thanks for the clarification, ~jpr On 11/08/2013 03:46 PM, Gregory Farnum wrote: Does Ceph provides the distributed filesystem and block device? Ceph's RBD is a distributed block device and works very well; you could use it to replace DRBD. ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] Is Ceph a provider of block device too ?
Thank you! I am studying and testing CEPH. I think it will be very good for my needs On 18-11-2013 20:31, Timofey root wrote: On 09 нояб. 2013 г., at 1:46, Gregory Farnum g...@inktank.com wrote: On Fri, Nov 8, 2013 at 8:49 AM, Listas lis...@adminlinux.com.br wrote: Hi ! I have clusters (IMAP service) with 2 members configured with Ubuntu + Drbd + Ext4. Intend to migrate to the use of Ceph and begin to allow distributed access to the data. Does Ceph provides the distributed filesystem and block device? Ceph's RBD is a distributed block device and works very well; you could use it to replace DRBD. The CephFS distributed filesystem is in more of a preview mode and is not supported for general use at this time. Does Ceph work fine in clusters of two members? It should work fine in a cluster of that size, but you're not getting as many advantages over other solutions at such small scales as you do from larger ones. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
[ceph-users] Is Ceph a provider of block device too ?
Hi ! I have clusters (IMAP service) with 2 members configured with Ubuntu + Drbd + Ext4. Intend to migrate to the use of Ceph and begin to allow distributed access to the data. Does Ceph provides the distributed filesystem and block device? Does Ceph work fine in clusters of two members? Thanks! -- www.adminlinux.com.br Thiago Henrique ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] Is Ceph a provider of block device too ?
On Fri, Nov 8, 2013 at 8:49 AM, Listas lis...@adminlinux.com.br wrote: Hi ! I have clusters (IMAP service) with 2 members configured with Ubuntu + Drbd + Ext4. Intend to migrate to the use of Ceph and begin to allow distributed access to the data. Does Ceph provides the distributed filesystem and block device? Ceph's RBD is a distributed block device and works very well; you could use it to replace DRBD. The CephFS distributed filesystem is in more of a preview mode and is not supported for general use at this time. Does Ceph work fine in clusters of two members? It should work fine in a cluster of that size, but you're not getting as many advantages over other solutions at such small scales as you do from larger ones. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
