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
