Gentoo Archives: gentoo-user

From: Adam Carter <adamcarter3@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: Normal disk speed?
Date: Wed, 06 Oct 2010 23:16:23
Message-Id: AANLkTi=+DxQqvYCVefBW2r6disXWKQT0E+YjtEKqDbeY@mail.gmail.com
In Reply to: Re: [gentoo-user] Re: Normal disk speed? by Daniel Troeder
1 WOW! Those differences are crazy!
2
3 >
4 > Please - I know benchmarking takes a lot of time - but could you check
5 > something: the behavior those fs have at what time they flush data from
6 > cache to disk is very different. Have you made sure that you measured
7 > the time it really needs? I mean the difference between:
8 >
9 > $ sync; time cp source dest
10 > and
11 > $ sync; time (cp source dest; sync)
12 >
13 > Only the last measures somewhat correctly.
14 >
15
16 I had noticed that there was, say, 5 seconds of disk activity after the cp
17 command complete which I assumed was buffers getting flushed, but 5 seconds
18 didnt seem that significant overall. I will run the tests as you suggest and
19 post back. Do you think btrfs (with or without compression) would be faster
20 than reiser? If so I will try that as well.

Replies

Subject Author
Re: [gentoo-user] Re: Normal disk speed? Daniel Troeder <daniel@×××××××××.com>