On Fri, Aug 17, 2012 at 1:09 PM, Wido den Hollander <wido@xxxxxxxxx> wrote: > > > On 08/17/2012 09:54 PM, Gregory Farnum wrote: >> >> On Fri, Aug 17, 2012 at 12:36 PM, Wido den Hollander <wido@xxxxxxxxx> >> wrote: >>> >>> Hi, >>> >>> I'm looking for the omap functions in librados.h, but they only seem to >>> be >>> implemented in librados.hpp? >>> >>> I want to store about 6000 objects in a RADOS pool, but I want to give >>> them >>> some attributes I can query for, this should be possible with the omap >>> functionality, shouldn't it? >> >> What do you mean, query for? You can look at an object and ask if it >> has "foo=bar" in its omap, but you can't say "give me all objects with >> 'foo=bar'". >> > > Ah, I must have understood that differently. I thought that leveldb was > added so you could give objects attributes you could query. No, leveldb is just a nice fast store — sorry! > So yes: "Give me all objects that have foo=bar" > > I thought I saw some discussion regarding this. > > Any ideas besides setting up a own external database with this information? Well, you could maintain the data in a single rados object, if it doesn't need to get too large. Or Eleanor (one of our friendly interns!) has been writing a prototype distributed b-tree database thingy that you might want to look at. But there are presently no plans to (or ideas of how to) implement a generic query-able set of attributes which are co-located with nodes. -Greg -- 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
