3. ext4 my big data _ exploration (3 )!

Nonsense:

What am I doing? After adjusting the maximum performance measured by iometer and program for raid, you can choose to provision the appropriate file system. To achieve better performance, we are currently concerned with ext4 and XFS;

Question:

Command:

Mke4fs-N 1000000-I 128-o ^ has_journal, extent, meta_bg, flex_bg/dev/SDD

Mke2fs-O journal_dev, extents, huge_file, dir_index, flex_bg, bigalloc, mballoc, delalloc-T ext4-e stride = 1024 stripe-width = 5/dev/SDD

Is the Mount parameter "extents, mballoc, delalloc, barrier = 1, data = writeback, noatime, nodiratime, ACL, user_xattr" appropriate?

Recommended: "extents, mballoc, delalloc, barrier = 0, noatime, nodiratime, ACL, user_xattr"

Ext4 adoptsExtentAfter the structure, the continuity of data distribution on the hard disk has been greatly improved.

BigallocI can only increase some throughput on this basis. I dare not say "greatly increase". Of course, if you upgrade from ext3 to ext4 bigalloc, the performance improvement will be very conspicuous.

 

Prayer:

My e2fsprogs, install it now!