I don't think HDFS is a good place to store your Xen image file as it will likely be updated/appended frequently in small blocks. With the way HDFS is designed for, you can't quite use it like a regular filesystem (e.g. ones that support frequent small block appends/updates in files). My suggestion is to use another filesystem like NAS or SAN.
/Taeho 2009/5/22 신승엽 <mikas...@naver.com> > Hi, I have a problem to use hdfs. > > I mounted hdfs using fuse-dfs. > > I created a dummy file for 'Xen' in hdfs and then formated the dummy file > using 'mke2fs'. > > But the operation was faced error. The error message is as follows. > > [r...@localhost hdfs]# mke2fs -j -F ./file_dumy > mke2fs 1.40.2 (12-Jul-2007) > ./file_dumy: Input/output error while setting up superblock > Also, I copyed an image file of xen to hdfs. But Xen couldn't the image > files in hdfs. > > r...@localhost hdfs]# fdisk -l fedora6_demo.img > last_lba(): I don't know how to handle files with mode 81a4 > You must set cylinders. > You can do this from the extra functions menu. > > Disk fedora6_demo.img: 0 MB, 0 bytes > 255 heads, 63 sectors/track, 0 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > > Device Boot Start End Blocks Id System > fedora6_demo.img1 * 1 156 1253038+ 83 Linux > > Could you answer me anything about this problem. > > Thank you. >
