Re: Ceph support for Direct I/O

2012-05-18 Thread Colin Hall
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 : > > 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 co

Re: Ceph support for Direct I/O

2012-05-18 Thread Francisco Vila
2012/5/17 Chang : > 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 __

Ceph support for Direct I/O

2012-05-17 Thread Chang
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.