Gentoo Archives: gentoo-user

From: Alan McKinnon <alan.mckinnon@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] How reliable is ext3?
Date: Wed, 24 Apr 2013 10:29:00
Message-Id: 5177B3AE.7060008@gmail.com
In Reply to: Re: [gentoo-user] How reliable is ext3? by Neil Bothwick
1 On 24/04/2013 12:17, Neil Bothwick wrote:
2 > On Wed, 24 Apr 2013 12:10:56 +0200, Alan McKinnon wrote:
3 >
4 >>> "Some directory operations (including unlink(2)) are not synchronous
5 >>> on ReiserFS, which can result in data corruption with applications
6 >>> relying heavily on file-based locks (such as mail transfer agents
7 >>> qmail[9] and Postfix[10]) if the machine halts before it has
8 >>> synchronized the disk."
9 >>>
10 >>> So I can lose stuff if the computer crashes. I don't see that as a
11 >>> specific problem with MTAs. although they do tend to have a lot of
12 >>> file throughput. On the other hand, I think the fact that maildir
13 >>> uses so many files is one of the reasons I went with ResierFS in the
14 >>> first place, running out of inodes on a mail server would not be my
15 >>> idea of fun.
16 >>
17 >> I solve that problem for me in the obvious way:
18 >>
19 >> I pay less attention to choice of filesystem and more attention on
20 >> rigging systems that don't crash!
21 >
22 > Maybe that's why I never hit this bug, I don't recall my mail server ever
23 > crashing.
24 >
25 > If this mail does not arrive intact, I spoke too so^%£$£"
26
27
28 Postfix doesn't crash (for the everyday human definition of "doesn't").
29
30 Here's my pair of MTAs:
31
32 $ uptime
33 12:24PM up 1295 days, 13:10, 1 user, load averages: 0.19, 0.20, 0.31
34
35 $ uptime
36 12:24PM up 1925 days, 20:30, 4 users, load averages: 0.90, 0.75, 0.84
37
38 Those two just keep on accepting and dealing with mail, they do that a
39 million times a day and according to uptime have been doing it for 10 years.
40
41
42 --
43 Alan McKinnon
44 alan.mckinnon@×××××.com

Replies

Subject Author
Re: [gentoo-user] How reliable is ext3? Tanstaafl <tanstaafl@×××××××××××.org>