Hi Swapnil... On Thu, Dec 29, 2011 at 10:42, Swapnil Gaikwad <swapnilgaik72@xxxxxxxxx> wrote: > How the extend is different from block allocation? The way I see extent is: it's like doing cluster allocation. Meaning, you don't allocate it one by one, but as a whole. For example, with extent size 1 MB and block size 4 KB, it means filesystem allocate 256 blocks at once. Although it sounds like multi block allocation or read ahead, I think the underlying implementation is a bit different. Sorry, this is the best I know -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies