On 09/08/2014 09:57 AM, Jakes John wrote: > Hi all, > I have been reading ceph-crush-location hook ( > http://ceph.com/docs/master/rados/operations/crush-map/ ) which says to > add crush location field in the conf file to provide location awareness > to ceph deamons and clients. I would like to understand whether ceph use > this location awareness information internally for placing read/write > requests of objects. I couldn't find related details anywhere in the > documentation. > I used this recently for a deployment with servers mixed with SSDs and HDDs. I used this location lookup script: https://gist.github.com/wido/5d26d88366e28e25e23d This way I have a 'hostname-ssd' and 'hostname-hdd' bucket for each machine. I can then create CRUSH rules using those machines to put data on SSDs or HDDs. > Thanks > > > <http://ceph.com/docs/master/rados/operations/crush-map/#ceph-crush-location-hook> > > > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Wido den Hollander Ceph consultant and trainer 42on B.V. Phone: +31 (0)20 700 9902 Skype: contact42on
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