On Mon, 20 Jan 2014, Ara Sadoyan wrote: > Hi list, > > We are on a process of developing custom storage application on top of Ceph. > We will store all metadata in Solr for fast search for paths and get files > only with calling direct links. > My question is: Which one is better solution for that propose? Use CephFS or > RadosGW. > Which on e will perform faster and better ? Very generally speaking, radosgw will probably have a lower metadata overhead, but involves a proxy node (http -> ceph internal protocol). Cephfs involves the metadata server, but the cephfs clients go direct to OSDs. There is a third option, though: librados. If you are using solr or some other data store for metadata, you may not need the metadata services of either the cephfs mds or radosgw. Basically, if you don't need object rename, and can handle striping of your large data items over smaller rados objects, then librados may be a good fit. It provides rich data types (bytes, attributes, key/value storage), single-object transactions, and the ability to run code directly on the storage node. Here is a recent talk about librados: http://mirror.linux.org.au/pub/linux.conf.au/2014/Wednesday/60-Distributed_storage_and_compute_with_Cephs_librados_-_Sage_Weil.mp4 And the interface is defined here: http://ceph.com/docs/master/rados/api/librados/ https://github.com/ceph/ceph/blob/master/src/include/rados/librados.hpp https://github.com/ceph/ceph/blob/master/src/include/rados/librados.h sage _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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