LISTSERV mailing list manager LISTSERV 16.0

Help for MICE-DISCUSS Archives


MICE-DISCUSS Archives

MICE-DISCUSS Archives


MICE-DISCUSS@LISTS.IPHOUSE.NET


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Monospaced Font

LISTSERV Archives

LISTSERV Archives

MICE-DISCUSS Home

MICE-DISCUSS Home

MICE-DISCUSS  March 2015

MICE-DISCUSS March 2015

Subject:

Re: FW: New gen route servers

From:

Anton Kapela <[log in to unmask]>

Reply-To:

MICE Discuss <[log in to unmask]>

Date:

Fri, 27 Mar 2015 07:13:12 -0500

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (48 lines)

(Chiming in because storage and OS nerding)

Given the use case (safety > perf), perhaps the route server storage would be best matched by something like a sync-mounted file system, raid1 with no cache enabled, or read cache only with a forced write-through?

A pair of SLC-type SSD's with ext3/4, or XFS mounted 'sync' atop a write-through raid1 should still be entirely awesome and performant for the job of booting an OS and loading route-server binaries, and perhaps even soaking up a few syslog outputs...while being as 'safe' as the hardware allows.

If that sounds tempting, tell me where to fedex the ssd media & caddy adapters :)

-Tk

> On Mar 27, 2015, at 1:26 AM, Doug McIntyre <[log in to unmask]> wrote:
>
>> On Thu, Mar 26, 2015 at 06:24:03PM -0500, Brady Kittel wrote:
>> As an alternate option I have several HP dl380 g7's that are maybe a year
>> old and still under warranty I could provide. They have licensed ILO on
>> them as well and I could provide some hot spare drives for them.
>
> I think with the current PE R320 and PE R805, that we are probably set, but
> thank you for your offer. The R320 is a pretty new box, hmm, pulling the
> serial # and going to Dell, it looks like it is only 16 months old. Jeff
> mentioned they had some more coming out of cycle, and that people were looking
> to get a hot spare at the UG meeting?
>
> I think the specific problem I was seeing with the old hardware was
> due to a very specific configuration. With the PERC6/i battery backed
> up RAID controller, and some combination due to the age of the battery,
> and that specific design, which periodically (every 2-3 months or so) does
> a deep drain and charge cycle on the battery to make sure it can hold its'
> intended charge for the writeback log, during this cycle it switches the
> writeback log off and then on again, and sometimes the OS glitches on this
> sudden change in disk latency. My guess is the batteries were below a certain
> threshold point that exacerbated the writelog switchover, since we have been
> running on the same hardware for quite some time without issues, but not
> below the threshold which would alert the BCM on the RAID battery being bad.
>
> Both of these new systems do not have a battery backed up RAID system, which
> really isn't needed in this use case anyway, and are newer hardware, which I
> think would serve us well.
>
> I have both inhouse, with the OS installed, I just have to copy the configs back over,
> which I can get done pretty quickly, as it isn't extensive, and haul them down
> to 511. I'll have to schedule up some sort of switchout time, how much lead time
> would a graceful changeout of the hardware be required?
>
> --
> Doug McIntyre <[log in to unmask]>
> ~.~ ipHouse ~.~
> Network Engineer/Provisioning/Jack of all Trades

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

March 2024
February 2024
January 2024
December 2023
November 2023
October 2023
September 2023
August 2023
July 2023
June 2023
May 2023
April 2023
March 2023
February 2023
January 2023
December 2022
November 2022
October 2022
September 2022
August 2022
July 2022
June 2022
May 2022
April 2022
March 2022
February 2022
January 2022
December 2021
November 2021
October 2021
September 2021
August 2021
July 2021
June 2021
May 2021
April 2021
March 2021
February 2021
January 2021
December 2020
November 2020
October 2020
September 2020
August 2020
July 2020
June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010

ATOM RSS1 RSS2



LISTS.IPHOUSE.NET

CataList Email List Search Powered by the LISTSERV Email List Manager