Re: Ceph support for Direct I/O
2012/5/17 Chang oykim...@gmail.com: Hi, I was trying to test write performance of Ceph, using direct I/O. This is bug-lilypond list. Please check again and post to the correct list. LilyPond is a program to engrave music scores. -- Francisco Vila. Badajoz (Spain) www.paconet.org , www.csmbadajoz.com ___ bug-lilypond mailing list bug-lilypond@gnu.org https://lists.gnu.org/mailman/listinfo/bug-lilypond
Re: Ceph support for Direct I/O
Thanks for responding to that one, Francisco. Cheers, Colin. On Fri, May 18, 2012 at 12:59:33PM +0200, Francisco Vila wrote: 2012/5/17 Chang oykim...@gmail.com: Hi, I was trying to test write performance of Ceph, using direct I/O. This is bug-lilypond list. Please check again and post to the correct list. LilyPond is a program to engrave music scores. -- Francisco Vila. Badajoz (Spain) www.paconet.org , www.csmbadajoz.com ___ bug-lilypond mailing list bug-lilypond@gnu.org https://lists.gnu.org/mailman/listinfo/bug-lilypond -- Colin Hall South Mains West Linton EH46 7AY Scotland Tel: 01968 661994 Mob: 07786 677582 ___ bug-lilypond mailing list bug-lilypond@gnu.org https://lists.gnu.org/mailman/listinfo/bug-lilypond
Ceph support for Direct I/O
Hi, I was trying to test write performance of Ceph, using direct I/O. $ dd if=/dev/zero of=/mnt/ceph/my.dat bs=1M count=1 oflag=direct But dd is just stuck without doing any write. Without oflag, write is done fine. In the above example, I used Ceph kernel module 0.20, built on kernel 2.6.32. I also tried Ceph fuse client to mount. In this case, the above dd command gives me: dd: opening `/mnt/ceph/my.dat': Invalid argument Is it because Ceph does not support direct I/O? I'm using ceph 0.46, installed using Debian release package. There are three OSDs, 1 Mon and 1 MDS in the cluster. Any help or clarification is appreciated. Chang ___ bug-lilypond mailing list bug-lilypond@gnu.org https://lists.gnu.org/mailman/listinfo/bug-lilypond
