Phil Stracchino wrote: >> Most practical disk backup setups will involve large RAID-5, RAID-6 or >> RAID-10 arrays. These tend to be striped across the spindles anyway, and >> the file system is rarely properly aware of how this striping occurs. > > *nod* Indeed. Nor should it care, since for general purposes, it > shouldn't matter. It's not the filesystem's problem - except of course > in advanced filesystems like ZFS where the filesystem IS the RAID > implementation.
It can be of significant impact on write, as the FS can coalesce writes into stripe sized pieces, minimising read-modify-write cycle. XFS certainly and EXT4 I think, are software md RAID aware and will optimised FS creation based on number of drives and RAID level. In the case of hardware raid or stacked md, it is certainly worth working out the appropriate switch settings manually when creating the FS. Regards, Richard ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
