I have discovered that files and/or partitions greater than 1TB in size may give you serious performance issues when transferring from one drive to another. The problem for me appeared just after the 1TB size was reached while transferring a 2TB partition using gddrescue. There was some discussion in here about this problem (Feb 2016) after I attempted to clone a 2TB drive, the performance drop consistently appeared after a little more than more than 1TB of data was transfered, the performance dropped from a reliable 100Mb/s, down to only a few KB/s. Converting to XFS solved the problem entirely (using the same drives and hardware). I'm also a long time JFS user, except for this one problem, JFS has been a very reliable workhorse.
On 16-07-11 08:02 AM, Jernej Simončič wrote: > On Tuesday, July 5, 2016, 12:09:46, djbar wrote: > >> ¿ Is JFS (version linux) sufficiently stable, solid and mature?. >> What attracts me it is its previous use in AIX servers (IBM), >> and it does years that the code has not been patched. > I've been using jfs for years both at work and home, and only had fs > corruption once so far, when my home server was reset by accident > (caused my 8GB /var to go weird - had to mount it read-only to get the > files off). The largest jfs volume I have is 17TB, and that never had > any problems. > > Note that I noticed a performance problem with jfs and very large > files (128GB and above) - if the filesystem is *not* fragmented, > extending large files can become very slow (2-3MB/s write instead of > 200+MB/s), with high CPU usage in jfsCommit. Keep this in mind if you > plan to store such files on the filesystem. > ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Jfs-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jfs-discussion
