> On Thu, Dec 01, 2005 at 02:55:50PM -0600, Ken Teh wrote: > > SL4.1's stock kernel does not have built-in JFS nor XFS support. But there > > is a contributed XFS rpm. Is this the preferred filesystem for large > > partitions? If so, why? Hi We are using XFS file systems on several nodes of Scientific Linux 4.0 and scientific Linux 4.2 at RIKEN CCJ . We obaseved frequent file system problems of ext3 file system in transferring large raw data from BNL to RIKEN by Gridftp. The problem is that CPU utilization becomes large (100%) during the file operation and the system almost hanged up in the GridFTP. After changing the file system from ext3 to XFS, the GridFTP becomes very stable and we have successfully transfered 270 TB date from BNL to RIKEN Japan over the pacific ocean. (Typical transfer rate was 700-750 Mbits/s) This is summarized in the recent CERN courier issue. http://www.cerncourier.com/main/article/45/7/15 The current redhat ES 4 kernel uses 4 KB stack and this is incompatible with XFS, and probably with JFS and ReiserFS . Some information for 4KB kernel stack problem can be found at the URL below. http://oss.sgi.com/archives/linux-xfs/2005-07/msg00044.html https://www.redhat.com/archives/nahant-list/2005-June/msg00304.html To use XFS system on SL 4.0 and SL 4.2 , we are using original Linux kernel source obtained from http://www.kernel.org/ and configured to enable the XFS system. In the original 2.6 kernel, the stack size is 8 KB, which is compatible with XFS, JFS and ReiserFS. Best Regards, Takashi Ichihara ([log in to unmask]) RI Physics lab/Radiation lab/Accelerator Facility RIKEN (The Institute of Physical and Chemical Research) 2-1 Hirosawa, Wako, Saitama 351-0198, Japan