"Daniel Taylor" <Daniel.Taylor@xxxxxxx> writes: > > As long as no object smaller than the disk block size is ever > flushed to media, and all flushed objects are aligned to the disk > blocks, there should be no real performance hit from that. The question is just how large such a block needs to be. Traditionally some RAID controllers (and possibly some SSDs now) needed very large blocks upto MBs. > > Otherwise we end up with the damage for the ext[234] family, where > the file blocks can be aligned, but the 1K inode updates cause > the read-modify-write (RMW) cycles and and cost >10% performance > hit for creation/update of large numbers of files. Fixing that doesn't require a new file system layout, just some effort to read/write inodes in batches of multiple of them. XFS did similar things for a long time, I believe there were some efforts for this for ext4 too. -Andi -- ak@xxxxxxxxxxxxxxx -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
