Hi Yip, Thanks for the code. With respect to "can't grow", I think I can (with some difficulty perhaps?) resize the vm if I needed to, but I'm really just trying to buy myself time till CEPH-FS is production ready....Point #3 scares me, so I'll have to think about that one. Most likely I'd use a completely different technology to back-up this VM (eg rsync the key folders to some external, encrypted, cheap RAID storage, such as iomega.) Point 4 is probably not that big a deal for my needs, since CEPH itself should more-or-less ensure high availability due to disk crashes -- and as for VM crashing, I can tolerate a few minutes/hours downtime if needed, and so far I have yet to have a Linux VM crash over 3 years of running them....
On Mon, Nov 18, 2013 at 1:26 AM, YIP Wai Peng <yi...@comp.nus.edu.sg> wrote: > Hi all, > > I've uploaded it via github - https://github.com/waipeng/nfsceph. > Standard disclaimer applies. :) > > Actually #3 is a novel idea, I have not thought of it. Thinking about the > difference just off the top of my head though, comparatively, #3 will have > > 1) more overheads (because of the additional VM) > > 2) Can't grow once you reach the hard limit of 14TB, and if you have > multiple of such machines, then fragmentation becomes a problem > > 3) might have the risk of 14TB partition corruption wiping out all your > shares > > 4) not as easy as HA. Although I have not worked HA into NFSCEPH yet, it > should be doable by drdb-ing the NFS data directory, or any other > techniques that people use for redundant NFS servers. > > - WP > > > On Fri, Nov 15, 2013 at 10:26 PM, Gautam Saxena <gsax...@i-a-inc.com>wrote: > >> Yip, >> >> I went to the link. Where can the script ( nfsceph) be downloaded? How's >> the robustness and performance of this technique? (That is, is there are >> any reason to believe that it would more/less robust and/or performant than >> option #3 mentioned in the original thread?) >> >> >> On Fri, Nov 15, 2013 at 1:57 AM, YIP Wai Peng <yi...@comp.nus.edu.sg>wrote: >> >>> On Fri, Nov 15, 2013 at 12:08 AM, Gautam Saxena <gsax...@i-a-inc.com>wrote: >>> >>>> >>>> 1) nfs over rbd ( >>>> http://www.sebastien-han.fr/blog/2012/07/06/nfs-over-rbd/) >>>> >>> >>> We are now running this - basically an intermediate/gateway node that >>> mounts ceph rbd objects and exports them as NFS. >>> http://waipeng.wordpress.com/2013/11/12/nfsceph/ >>> >>> - WP >>> >> >> >> >> -- >> *Gautam Saxena * >> President & CEO >> Integrated Analysis Inc. >> >> Making Sense of Data.™ >> Biomarker Discovery Software | Bioinformatics Services | Data Warehouse >> Consulting | Data Migration Consulting >> www.i-a-inc.com <http://www.i-a-inc.com/> >> gsax...@i-a-inc.com >> (301) 760-3077 office >> (240) 479-4272 direct >> (301) 560-3463 fax >> > > -- *Gautam Saxena * President & CEO Integrated Analysis Inc. Making Sense of Data.™ Biomarker Discovery Software | Bioinformatics Services | Data Warehouse Consulting | Data Migration Consulting www.i-a-inc.com <http://www.i-a-inc.com/> gsax...@i-a-inc.com (301) 760-3077 office (240) 479-4272 direct (301) 560-3463 fax
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