There exists a more recently discuss in PR(https://github.com/ceph/ceph/pull/1665). On Mon, Feb 2, 2015 at 11:05 PM, J-P Methot <jpmethot@xxxxxxxxxx> wrote: > Hi, > > I've been looking into increasing the performance of my ceph cluster for > openstack that will be moved in production soon. It's a full 1TB SSD cluster > with 16 OSD per node over 6 nodes. > > As I searched for possible tweaks to implement, I stumbled upon > unitedstack's presentation at the openstack paris summit (video : > https://www.openstack.org/summit/openstack-paris-summit-2014/session-videos/presentation/build-a-high-performance-and-high-durability-block-storage-service-based-on-ceph). > > Now, before implementing any of the suggested tweaks, I've been reading up > on each one. It's not that I don't trust everything that's being said there, > but I thought it may be better to inform myself before starting > to implement tweaks that may strongly impact the performance and stability > of my cluster. > > One of the suggested tweaks is to set filestore_fiemap to true. The issue > is, after some research, I found that there is a rados block device > corruption bug linked to setting that option to true (link: > http://www.spinics.net/lists/ceph-devel/msg06851.html ). I have not found > any trace of that bug being fixed since, despite the mailing list message > being fairly old. > > Is it safe to set filestore_fiemap to true? > > Additionally, if anybody feels like watching the video or reading the > presentation (slides are at > http://www.spinics.net/lists/ceph-users/attachments/pdfUlINnd6l8e.pdf ), > what do you think of the part about the other tweaks and the data durability > part? > > -- > ====================== > Jean-Philippe Méthot > Administrateur système / System administrator > GloboTech Communications > Phone: 1-514-907-0050 > Toll Free: 1-(888)-GTCOMM1 > Fax: 1-(514)-907-0750 > jpmethot@xxxxxxxxxx > http://www.gtcomm.net > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Best Regards, Wheat _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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