Hi, On Wed, 2011-09-21 at 18:30 +0530, Atish Kathpal wrote: > I am referring to the "rados" command line tool in my question. > > Regards > Atish > > On Wed, Sep 21, 2011 at 3:14 PM, Atish Kathpal <atish.kathpal@xxxxxxxxx> wrote: > > On Tue, Sep 20, 2011 at 2:20 PM, Wido den Hollander <wido@xxxxxxxxx> wrote: > >> > >> Hi, > >> > >> On Tue, 2011-09-20 at 13:14 +0530, Atish Kathpal wrote: > >> > Hello friends > >> > > >> > Since there is no Ceph User's mailing list, I am posting my doubt here. > >> > > >> > I want to use the Ceph object store capabilities. I have already > >> > installed and setup a Ceph cluster. > >> > > >> > As a first step, I want to be able to GET/PUT or read/write to the > >> > object store of my cluster. I would prefer a HTTP/REST interface but > >> > please let me know of other interfaces that exist for performing > >> > read/writes to ceph object store/RADOS. > >> > >> You mean the radosgw? See: http://ceph.newdream.net/wiki/RADOS_Gateway > >> > >> That should give you a nice HTTP interface to your RADOS objects. Almost > >> fully S3 compatible. > >> > >> There is also a command-line tool "rados" which you could use, but you > >> can also write something against librados (C/C++). > >> > > > > I tried using rados. But it does not seem to work. > > > > atish@atish-virtual-machine:/etc/ceph$ rados ls > > 2011-09-21 15:13:32.030505 b7795b50 monclient(hunting): > > MonClient::init(): Failed to create keyring Does the user atish have read access on the ceph.conf? And does it also have access to the keyring.bin file? I assume you have cephx enabled? Wido > > > > Any fixes? > > > > Thanks > > Atish > > > > > > > >> > > >> > Final goal: Besides normal read/writes, I also want to be able to have > >> > some objects, which point to no data. That is, I want to have a > >> > special flag, which if set, would mean there is no data pointed to by > >> > this Object ID. If its unset, it means its like a normal object > >> > pointing to some data file(s). I want to have the freedom to be able > >> > to set/unset this flag and hence be able to delete/re-insert the > >> > corresponding data file(s) against the same object ID. Do we have an > >> > API which could allow me such functionality? > >> > >> No, RADOS is a pretty straight forward API. You have pools where you > >> place objects in. Objects can have xattrs and that's about it. > >> > >> If you want these kinds of logic you'd have to write your own layer over > >> librados. > >> > >> You could set xattr telling a object is empty. > >> > >> RADOS is pretty low-level and straight forward. There is not much logic > >> in it, no locking or other fancy stuff. Just store objects in pools and > >> make sure they are safe. > >> > >> Any other logic should be done by yourself. > >> > >> Wido > >> > >> > > >> > Please point me to suitable links/starting points. > >> > > >> > Thanks > >> > Atish > >> > -- > >> > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > >> > the body of a message to majordomo@xxxxxxxxxxxxxxx > >> > More majordomo info at http://vger.kernel.org/majordomo-info.html > >> > >> > > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
