linux-kernel - Re: [dm-devel] Barriers still not passing on simple dm devices...

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <49D959BD.7060002@redhat.com>
Date:	Sun, 05 Apr 2009 18:24:13 -0700
From:	Ric Wheeler <rwheeler@...hat.com>
To:	Lee Revell <rlrevell@...-job.com>
CC:	Ric Wheeler <ricwheeler@...il.com>, Theodore Tso <tytso@....edu>,
	Jens Axboe <jens.axboe@...cle.com>,
	Mikulas Patocka <mpatocka@...hat.com>,
	device-mapper development <dm-devel@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	ak@...ux.intel.com, "MASON, CHRISTOPHER" <CHRIS.MASON@...cle.com>
Subject: Re: [dm-devel] Barriers still not passing on simple dm devices...

On 04/05/2009 06:14 PM, Lee Revell wrote:
> On Sun, Apr 5, 2009 at 7:54 AM, Ric Wheeler<ricwheeler@...il.com>  wrote:
>> One thing to point out here is that there are a lot of "servers" in high end
>> data centers that do not have UPS backup. Those racks full of 1U and 2U
>> boxes that are used to make "grids", "clouds" and so on often are built with
>> as much gear as you can stuff in a rack - no batteries or UPS to be seen, so
>> they are really quite similar to the normal desktop or home systems that we
>> normally run at home :-)
>
> These days even bargain basement data centers provide UPS functionality for
> you, via generator backup and A/B power.
>
> Lee

In my experience, you will see multiple customers with and without UPS backup.

I have certainly dealt personally with many data centers that lost power without 
them & see array vendors that continue to build in their own batteries...

ric

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/