On 12.12.2014 12:48, Max Power wrote: > It would be great to shrink the used space. Is there a way to achieve this? Or > have I done something wrong? In a professional environment you may can live with > filesystems that only grow. But on my small home-cluster this really is a > problem. As Wido already mentioned the kernel RBD does not support discard. When using qemu+rbd you cannot use the virto driver as this also does not support discard. My best experience is with the virtual SATA driver and the options cache=writeback and discard=on. Regards -- Robert Sander Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-43 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin
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