On Thu, February 8, 2007 19:52, Liam Carey wrote: > We are running RedHat v4 Nahant Update 4 (kernel : 2.6.9-42.0.3.ELsmp > ) on an IBM Blade.
wow, 2.6.9 was released 10/2004 - I wonder how much they backport to these vendor kernels... > We would like to use JFS to frequently write 5-10 million small files > on a 500GB filesystem and I would like to hear advice/suggestions > regarding the performance and if necessary any system tweaks to get > good results. there are not many tweaks when creating the fs. Putting the log on an external device (mkfs.jfs -J device=...) sounds like a good idea when speed is critical. But in any case: before going in production I'd suggest to test your application with different setups (raid levels, filesystems) to get relvant details for *your* workload. > For example : Is fragmentation a problem? What kind of > read/write speeds have been seen? fragmentation seems to be an issue, see the archives, e.g. "Fragmentation and poor write speeds." thread a few days ago. Christian. -- BOFH excuse #36: dynamic software linking table corrupted ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Jfs-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jfs-discussion
