In XFS we can write parallel (i.,e we can make use of allocation groups for writing process). If the files are kept in individual directories, there is a possibility that first the blocks for that files be used from individual allocation groups. If I start ‘4’ writing process(cp 100MB_file /<dirnum>/) – after writing is finished – if I check the bmap – it does shows that initial allocation was from individual allocation groups. Even though in Ext4 also we do have groups – but I am not able to get behavior similar to XFS. If I check the file extents – the extents are in mixed form, the allocation pattern is also very fragmented. Please share more on this. Also, if there is a possible exact test case to check for parallel writes support. Thanks & Regards, Amit Sahrawat -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
