Re: Ext4 vs Ext3, is it really stable ?
Alex Samad escribió:
On Tue, Jan 20, 2009 at 12:41:43PM +0100, Adrian Chapela wrote:
Hello!
I am doing my own tests with Ext4. It has better performance than ext3
FS. On some tests that I have done, I have 40 MB/s more than the same
hardware with ext3 FS. Have you seen the same ?
what are you using to test ?
dd writing big file from /dev/zero and ddt that is an utility from
www.coraid.com. This is the best test for Ext4, because the change in
allocate of space.
I using some 512 MB size file, about 70 files, copy with cp. But I have
no conclusion about that.
Now I am using bonnie++, it is the results:
EXT3
Version 1.03d ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP
K/sec %CP K/sec %CP /sec %CP
quimby 65000M 78616 99 170081 41 50446 11
59721 91 217404 21 922.5 1
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP /sec %CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
+++++
+++
quimby,65000M,78616,99,170081,41,50446,11,59721,91,217404,21,922.5,1,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
EXT4
Delete files in random order...done.
Version 1.03d ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP
K/sec %CP K/sec %CP /sec %CP
quimby 65000M 89859 99 313607 45 40621 7
53697 82 150243 13 1145 1
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP /sec %CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
+++++ +++
quimby,65000M,89859,99,313607,45,40621,7,53697,82,150243,13,1145.5,1,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+
You could have your conclusion about this result. The machine is 32 GB
RAM and 8 RAID 5 SAS hd. Have you any better idea to test ? Have you any
idea about RAID configuration to improve performance?
[snip]
Regards, Adrián
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