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From: "H. Peter Anvin" <hpa@zytor.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Jean Delvare <khali@linux-fr.org>,
	"lasse.collin@tukaani.org" <lasse.collin@tukaani.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	"mirrors@kernel.org" <mirrors@kernel.org>,
	"users@kernel.org" <users@kernel.org>,
	"FTPAdmin Kernel.org" <ftpadmin@kernel.org>
Subject: Re: [kernel.org users] XZ Migration discussion
Date: Tue, 16 Feb 2010 16:11:12 -0800	[thread overview]
Message-ID: <4B7B3420.9050105@zytor.com> (raw)
In-Reply-To: <987664A83D2D224EAE907B061CE93D53123E0ED5@orsmsx505.amr.corp.intel.com>

On 02/16/2010 09:55 AM, Luck, Tony wrote:
> 
>>> How hard a requirement is this? It might be the right time to
>>> reconsider... Tony's plan may not be perfect but overall I think I like
>>> it.
>>>
>>
>> It's pretty darn hard.  It makes it particularly messy for the mirrors 
>> to ignore it.
> 
> Sometimes hard things are worth the effort though.  I would think that
> there would be considerable advantage to a mirror system that had a
> mechanism to mark entire subtrees as "archive only - no further changes".
> 

There are a couple of reasons to not do that.

a) the moment we do that, some mirrors will start purging those areas.
We have tried to keep our mirror system universally usable by keeping a
"whole mirrors only, please" policy, and it has worked really well so far.

b) it would prevent us from *ever* reorganizing those areas, as many be
required.

c) it complicates a lot of the machinery, including the bits that allow
mirrors to only carry some of the compression formats.  That includes
mirror-side configuration, which I'd really loathe to make anything more
than very simple; mirror admins want things to work as hands-off and
automatic as possible, with a minimum of setup.  Having to learn the
intricacies of each mirror target is just plain hell.

	-hpa


  parent reply	other threads:[~2010-02-17  0:12 UTC|newest]

Thread overview: 106+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-11 18:36 XZ Migration discussion J.H.
2010-02-11 19:44 ` david
2010-02-11 19:48 ` H. Peter Anvin
2010-02-12  0:14   ` [kernel.org mirrors] " Carlos Carvalho
2010-02-11 20:22 ` [kernel.org users] " Willy Tarreau
2010-02-11 20:51 ` Pavel Machek
2010-02-11 22:22   ` H. Peter Anvin
2010-02-12 14:35     ` Jean Delvare
2010-02-13 17:10   ` Jean Delvare
2010-02-13 18:49     ` Geert Uytterhoeven
2010-02-13 19:30       ` Randy Dunlap
2010-02-16 14:55       ` Steven Rostedt
2010-02-13 23:28     ` Stefan Richter
2010-02-14  9:07       ` Jean Delvare
2010-02-13 23:52     ` Phillip Lougher
2010-02-14  9:23       ` Jean Delvare
2010-02-14  9:33         ` Justin P. Mattock
2010-02-14  9:49         ` Willy Tarreau
2010-02-14 12:43           ` Jean Delvare
2010-02-15 21:31           ` James Cloos
2010-02-17  5:40             ` Willy Tarreau
2010-02-17  5:54               ` H. Peter Anvin
2010-02-17 10:22               ` Petri Kaukasoina
2010-02-17 10:25               ` Petri Kaukasoina
2010-02-14  9:56       ` Andi Kleen
2010-02-18 23:59         ` Jan Engelhardt
2010-02-14 10:16       ` Lasse Collin
2010-02-12 14:01 ` Jean Delvare
2010-02-12 15:21   ` Linus Torvalds
2010-02-12 19:02     ` J.H.
2010-02-12 19:23       ` Jean Delvare
2010-02-12 23:07         ` Willy Tarreau
2010-02-13  6:20           ` Pavel Machek
2010-02-13 10:06             ` Stefan Richter
2010-02-13 10:21               ` Stefan Richter
2010-02-14  9:56                 ` Lasse Collin
2010-02-13  8:17           ` Jean Delvare
2010-02-13  9:59             ` Stefan Richter
2010-02-13 10:18               ` Avi Kivity
2010-02-13 21:37                 ` [kernel] " Mr. James W. Laferriere
2010-02-13 22:39                   ` Bernd Petrovitsch
2010-02-15 19:33                     ` [kernel.org users] [kernel] " Steve French
2010-02-16  9:16                       ` Bernd Petrovitsch
2010-02-16 15:13                         ` J.H.
2010-02-14 17:13               ` [kernel.org users] " Pavel Machek
2010-02-14 17:33                 ` Stefan Richter
2010-02-14 20:51                   ` Pavel Machek
2010-02-15  8:48                     ` Stefan Richter
2010-02-15 23:32                       ` Tom Rini
2010-02-16  8:21                         ` Stefan Richter
2010-02-14 17:07             ` Pavel Machek
2010-02-14 18:39               ` Stefan Richter
2010-02-14 21:04                 ` david
2010-02-14 21:32                   ` Jean Delvare
2010-02-14 18:59               ` H. Peter Anvin
2010-02-14 19:08               ` Jean Delvare
2010-02-15 15:15                 ` tytso
2010-02-16 15:29                   ` J.H.
2010-02-16 16:03                     ` Jean Delvare
2010-02-17  1:36                     ` David Rees
2010-02-16 14:00                 ` Pavel Machek
2010-02-19  0:08     ` Jan Engelhardt
2010-02-19  4:38       ` J.H.
2010-02-12 15:25   ` Steven Rostedt
2010-02-12 16:11     ` Jean Delvare
2010-02-12 16:30       ` Steven Rostedt
2010-02-12 16:44         ` Jean Delvare
2010-02-12 20:34         ` Junio C Hamano
2010-02-12 21:16           ` Steven Rostedt
2010-02-16 15:39     ` ketchup was " Pavel Machek
2010-02-16 16:17       ` Steven Rostedt
2010-02-16 16:27         ` Pavel Machek
2010-02-21 13:53           ` Pavel Machek
2010-02-21 14:26             ` Jean Delvare
2010-02-21 19:28               ` Pavel Machek
2010-02-22 18:59             ` Pavel Machek
2010-02-23 13:14               ` Steven Rostedt
2010-02-23 20:32                 ` Pavel Machek
2010-02-12 19:02   ` Phillip Lougher
2010-02-12 19:32     ` Jean Delvare
2010-02-12 19:57       ` Phillip Lougher
2010-02-12 21:59         ` Jean Delvare
2010-02-12 23:30           ` Phillip Lougher
2010-02-12 23:39           ` Phillip Lougher
2010-02-13  7:31             ` Jean Delvare
2010-02-13 22:37               ` Phillip Lougher
2010-02-14  9:32                 ` Jean Delvare
2010-02-14  9:53                   ` Justin P. Mattock
     [not found]           ` <20100212223547.GN5186@tux>
2010-02-13  7:20             ` Jean Delvare
2010-02-12 19:03   ` H. Peter Anvin
2010-02-12 20:25     ` Matthew Wilcox
2010-02-12 21:54       ` Greg KH
2010-02-12 21:58       ` Steven Rostedt
2010-02-14 14:49       ` Harald Arnesen
2010-02-14 18:34         ` H. Peter Anvin
2010-02-12 20:31     ` [kernel.org mirrors] " Sleddens, J.P.G.
2010-02-12 22:11       ` H. Peter Anvin
2010-02-12 23:14         ` [kernel.org users] [kernel.org mirrors] " Willy Tarreau
2010-02-13  7:42     ` [kernel.org users] " Tony Luck
2010-02-13  8:14       ` H. Peter Anvin
2010-02-13  8:53         ` Jean Delvare
2010-02-14  5:43           ` H. Peter Anvin
     [not found]             ` <987664A83D2D224EAE907B061CE93D53123E0ED5@orsmsx505.amr.corp.intel.com>
2010-02-17  0:11               ` H. Peter Anvin [this message]
2010-02-14 18:03 ` Eric W. Biederman
2010-02-14 22:27   ` Stephen Hemminger
2010-02-15 16:15     ` Jean Delvare

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