Hi Ilya, Do you know if this ENH will be developed soon (http://tracker.ceph.com/issues/3837 <http://tracker.ceph.com/issues/3837>) ? Is it already scheduled in the next releases or not ?
It could really improve BLOCK performance for oracle / database workload Thanks for your feedback Florent Monthel > Le 27 déc. 2014 à 22:37, Ilya Dryomov <[email protected]> a écrit : > > On Sat, Dec 27, 2014 at 6:46 PM, Florent MONTHEL <[email protected]> > wrote: >> Hi, >> >> I’ve just created image with striping support like below (image type 2 - 16 >> stripes of 64K with 4MB object) : >> >> rbd create sandevices/flaprdweb01_lun010 --size 102400 --stripe-unit 65536 >> --stripe-count 16 --order 22 --image-format 2 >> >> rbd info sandevices/flaprdweb01_lun010 >> rbd image 'flaprdweb01_lun010': >> size 102400 MB in 25600 objects >> order 22 (4096 kB objects) >> block_name_prefix: rbd_data.40c52ae8944a >> format: 2 >> features: layering, striping >> stripe unit: 65536 bytes >> stripe count: 16 >> >> But when I try to map device, I’ve unsupported striping alert on my dmesg >> console. >> >> rbd map sandevices/flaprdweb01_lun010 --name client.admin >> rbd: sysfs write failed >> rbd: map failed: (22) Invalid argument >> >> dmesg | tail >> [15352.510385] rbd: image flaprdweb01_lun010: unsupported stripe unit (got >> 65536 want 4194304) >> >> Do you know if it’s scheduled to support STRIPINGV2 on tbd client ? >> How can I mount my device ? > > You can't - krbd doesn't support it yet. It's planned, in fact it's > the top item on the krbd list. Currently STRIPINGV2 images can be > mapped only if su=4M and sc=1 (i.e. if striping params match v1 images) > and that's the error you are tripping over. > > Thanks, > > Ilya
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