On Tue, May 28, 2013 at 1:12 AM, Wido den Hollander <wido@xxxxxxxx> wrote: > Hi, > > > On 05/28/2013 10:03 AM, Alvaro Izquierdo Jimeno wrote: >> >> Hi! >> >> I’m using rados Gateway with the Swift API to handle objects into Ceph. >> I’m very interesting to handle metadata with the objects too. So, I can >> add metadata headers with a given format (X-Container-Meta-X : Y) and >> get it back again without problem. But, after this, I have several >> doubts about it: >> >> 1.- Which pool stores the metadata? By default, the objects are stored >> in .rgw.buckets pool. After a updating metadata request (POST request), >> I can see with ‘rados df’ that the only one pool updated is >> .rgw.buckets. So, Is the metadata and the objects stored in the same pool? >> Just note that we do have a plan to be able to set up different data and metadata pools for rgw, and it has been mostly implemented as part of the disaster recovery / geo-replication work that will go into dumpling (just missing an api to configure it). Yehuda > > Yes, it's stored as RADOS attributes. See this example: > > root@monitor:~# rados -p .rgw.buckets listxattr 8421179.1_auroracloud.png > user.rgw.acl > user.rgw.content_type > user.rgw.etag > user.rgw.x-amz-acl > user.rgw.x-amz-date > root@monitor:~# > > >> 2.- Can I setup this? I mean If I can store the metadata in a different >> pool or in a Database? >> > > No, that is not possible. It's stored as RADOS xattrs. > > >> 3.- By the way, is possible to search into radosgw by a metadata? For >> instance, searching how many objects have the metadata >> X-Container-Meta-X equal to Y. If the first question in this points >> is yes, can I make this kind of searching from the Swift API? >> > > No, RADOS doesn't support search queries like that. You can't say: "Hey, > give me all objects with xattr Y = Z" > > -- > Wido den Hollander > 42on B.V. > > Phone: +31 (0)20 700 9902 > Skype: contact42on > >> Thanks you so much and best regards, >> >> Álvaro. >> >> >> ____________ >> Verificada la ausencia de virus por G Data AntiVirus Versión: AVA >> 22.9938 del 28.05.2013 Noticias de virus: www.antiviruslab.com >> <http://www.antiviruslab.com> >> >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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