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 > > 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
