The Comms Room

tylerl

05:00

@MichaelHampton :-)

Michael Hampton

Now I think that's a first...this guy obfuscated his private IP addresses and left his public IP addresses untouched.

tylerl

@MichaelHampton Cause private IPs are, you know, private.

Michael Hampton

@tylerl Yeah, but now his name, address, email and phone number are public.

tylerl

@MichaelHampton with some people, it's inevitable.

Andrew

@MichaelHampton err, it's a hosting company

Michael Hampton

05:13

@Andrew Not that one, the other one.

@Andrew Here's a hint: In 6to4, the public IPv4 address is displayed in hex...

tylerl

@MichaelHampton which Q is this?

Michael Hampton

1

Q: Unidentified Network for HyperV Internal Switch

I am trying to setup a HyperV internal switch for the guest OS on a Windows Server 2012 host. After creating the new Internal Switch through Virtual Switch Manager, I can see the virtual adapter under Network Connections. But, it is listed as an "Unidentified Network". The host system has only o...

Andrew

@MichaelHampton sigh, who can be bothered?

tylerl

@MichaelHampton lol. I skipped over that one because crapton of pictures

Michael Hampton

@Andrew Google?

tylerl

05:16

Because if a picture is worth a thousand words, then this one is definitely TL;DR.

Michael Hampton

@tylerl Yeah, the pictures were mostly unnecessary. He should have copied and pasted.

Andrew

@MichaelHampton if they can be bothered doing an OCR and a whois... sure.

Michael Hampton

Am I the only one who can convert hex to decimal in my head?

tylerl

@MichaelHampton depends on the number

try 0x0D000000000

(no cheating)

Michael Hampton

@tylerl No, my brain is only 32-bit...

tylerl

05:24

0xDEADBEEF

(unsigned)

Michael Hampton

@tylerl You don't convert that. It's a magic number!

tylerl

0xB00F

Andrew

@MichaelHampton you should see his website...

ewwhite

I'm not sure I fully understand the problem or what you're trying to do here. — ewwhite 6 secs ago

Michael Hampton

That seems like it should be another magic number...

@Andrew Oh no....

tylerl

05:29

I'm conceptually all for the "predictable names" policy in udev/systemd -- but on my arch box it's coming up with "eno16777736" and "eno"33554984".

Mark Henderson

@ewwhite I think the crust of the question is in the last part. He has a VM that's running at 88% of the speed of when it runs natively

He wants to get it to run at 95% the speed

ewwhite

May not be possible.

Mark Henderson

The rest of what he's written is all red herrings

Michael Hampton

@ewwhite I suspect he's having NUMA issues. Though 88% of bare metal CPU performance isn't that bad, is it?

ewwhite

@MichaelHampton no, not at all

and even more, benchmarks aren't real life.

Andrew

05:34

@MarkHenderson he's discovering that there are some workloads for which fake CPUs are not as good as real CPUs?

ewwhite

This one makes my head hurt...

Andrew

something something game dev.

ewwhite

"spin-up" "render farm"

tylerl

freiheit

@tylerl Those should at least be in hex

tylerl

05:35

Domaintools capitalizes that last domain as OnlineWebsCrapper.com -- which I think is entertainingly appropriate.

Andrew

@tylerl not scraper - scrapper. Classy.

ewwhite

It seems like a waste of valuable compute time

how valuable is compute time?

Andrew

off topic, home use.

Michael Hampton

@ewwhite We used to pay by the minute for it, if they would let us touch the computer at all.

ewwhite

@MichaelHampton but some dude talking about 5 year-old gear...

My ESXI is only 88% efficient!!!

Michael Hampton

05:42

E5540 are kind of old, aren't they?

ewwhite

2009

Ry Jones

so half a decade

Michael Hampton

Read his previous question for some context.

ewwhite

yeah, head still hurts

Michael Hampton

Oh, I did find a picture of his render farm

Andrew

05:47

wait, 60-80 nodes?

did he steal someone's HPC cluster?

Michael Hampton

@Andrew No, 60-80 CPU cores

ewwhite

@MichaelHampton NOOOOO!!

@MichaelHampton DOES NOT COMPUTE!

Andrew

@MichaelHampton ... how!?

Michael Hampton

@ewwhite Yeah, I think that's what his question is all about!

10K only... serverfault.com/questions/524781/…

Ry Jones

help: reddit.com/r/answers/comments/1xzi3b/…

you guys are taking over my other life

Andrew

05:49

I don't supose anyone has a spare 7k rep they can throw my way?

Michael Hampton

@RyJones Help with what, it's [removed]?

Ry Jones

@MichaelHampton ah crap, he deleted his account, which means I can't approve it

ewwhite

Michael Hampton

@RyJones Sounds like he's crying because SO wouldn't write his program for him.

Ry Jones

@MichaelHampton I just thought it was funny that this showed up in my mod queue over at reddit

freiheit

05:55

@ewwhite Maybe this is crazy, but that kinda looks like it's time for an upgrade to more and/or faster CPUs.

ewwhite

@freiheit So I think he misconfigured his VM

tylerl

@RyJones I've actually seen a lot of questions on several of the SE sites saying, more or less "If this isn't the right place to ask my question, then what is?" And the sad answer is: nobody wants to answer your question, your question isn't interesting. The SO/SE community isn't the problem, the problem is that no community wants to deal w/ that crap.

Michael Hampton

@ewwhite Oh wait, it looks like he's got hyperthreading on too

Ry Jones

@tylerl that is my entire mod queue at reddit. people asking for redirects. we ban legal and medical questions and about half of the stuff I delete is legal or medical

freiheit

@tylerl airpair.com

Andrew

05:58

@tylerl Stack Exchange is not a forum.

Stack Exchange is not a democracy.

(Stack Exchange is not your mother?)

Michael Hampton

I thought Stack Exchange was a bunch of ASP.NET code?

Ry Jones

man, melatonin kicks in quickly

freiheit

@Andrew Stack Exchange is your father!

Noooooo

Andrew

@freiheit "X is not your mother" means they won't clean up after you.

freiheit

@Andrew "X is your father" means you are Luke Skywalker.

Michael Hampton

06:00

@ewwhite Oh, and for some reason zfs send | zfs receive is WAY faster than cp.

ewwhite

@MichaelHampton yep

freiheit

@MichaelHampton How's it compare to tar cf - | tar xf - or tar cf - | dd | tar xf -?

ewwhite

@freiheit can be similar....

Michael Hampton

@freiheit Dunno, didn't occur to me to try that.

ewwhite

but zfs send/receive works for zvols...

Michael Hampton

06:02

And zpool iostat is kind of weird...

ewwhite

[root@GreenLeaf ~]# zpool iostat -v 1
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
vol0         299G   821G     30    130   561K  2.10M
  mirror     299G   821G     30    130   561K  2.10M
    fioa        -      -      7     43   387K  2.60M
    fiob        -      -      7     43   388K  2.60M
----------  -----  -----  -----  -----  -----  -----
vol1        72.2G   252G      7     19  68.3K  84.8K

Michael Hampton

                                                              capacity     operations    bandwidth
pool                                                       alloc   free   read  write   read  write
---------------------------------------------------------  -----  -----  -----  -----  -----  -----
libvirt                                                     212G  2.51T    135     73  3.45M   864K
  mirror                                                    212G  2.51T    135     73  3.45M   864K
    dm-name-luks-ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0742056      -      -     58     31  1.66M  1007K

Stupid 80 column terminals...

Stupid Markdown...

2

freiheit

@MichaelHampton dmst.aueb.gr/dds/pubs/trade/1999-login-dd/html/dd.html

ewwhite

I like ZFS!

0

A: vSphere - Allocate 100% CPU to 1 VM / 88% efficiency

You've misconfigured your virtual machine(s) and host. Things to consider: If you have a computationally-heavy process, you may want to disable HyperThreading. HyperThreaded (logical) cores are not the same as physical cores!! Intel E5540 CPUs date back to 2009. They are quad-core CPUs. You'l...

Michael Hampton

@freiheit Double ~~buggering~~ buffering, nice.

tylerl

06:10

@freiheit and there's always expert sexchange.com

freiheit

@tylerl No. No there is not. They are dead to me, dead to my google config, and dead to my browsers.

tylerl

@freiheit but a wonderful place to send whiners.

I think their google-juice has run dry. I haven't seen them show up in a search in years. Wonder if they're still around.

freiheit

@tylerl I think "pay for some help" is a better solution than "expert sexchange.com"...

tylerl

@freiheit Indeed.

freiheit

@tylerl Did you click on a "don't show me results from this site" link for them a few years ago?

Andrew

06:14

@freiheit oh wow, have you seen their site lately?

tylerl

@freiheit probably.

Andrew

> If you know a thing a two about technology, maybe you’re an expert, too.

I know a thing or two about grammar...

I just realised it would be hilarious if all the cartoon figures on that page were replaced with Ren and Stimpy.

freiheit

@Andrew Looks fundamentally the same, even if they added cute cartoons...

Andrew

@freiheit you used to be able to get them via google cached results

eBay is recommending me Lego and Star Wars. How did it know!?

Oh.

> You're viewing popular interests on eBay today. To see your own personalized feed please click here.

Michael Hampton

Who the hell builds a "network switch" on Fedora 14, for fucks sake?

freiheit

06:24

@MichaelHampton Is that worse or better than your average SOHO router?

tylerl

You could built it on busybox and a kernel. Not sure if that qualifies as a distro, but it certainly is all you get in the routers you buy at a big-box retailer.

Andrew

@MichaelHampton how many ports?

ewwhite

I'm willing to try it, but this task greatly benefits from hyper-threading so I don't want to turn off the feature. — Cody Smith 25 secs ago

Andrew

@ewwhite ... what?

ewwhite

I'm 'bout to smack someone

The guy has 2 x quad-core Nehalem CPUs in his server...

8 cores...

16 cores with hyper threading.

Michael Hampton

06:33

@Andrew Don't ask me... serverfault.com/q/576088/126632

Andrew

@MichaelHampton what sort of workload "greatly benefits from hyperthreading"?

too much black magic.

ewwhite

So making a VM with 16 vCPU on a host with 8 real cores is wrong

Andrew

hmm.

Michael Hampton

How does VMware handle hyperthreads, then?

ewwhite

@MichaelHampton it will schedule onto them... but that's for mixed workloads. If I had a 24-core box of real cores, I still wouldn't create a 24 vCPU virtual machine

the guy is doing something that will peg all CPUs... and in reality, hyper threaded cores aren't the same as a physical.

Michael Hampton

06:36

Nope... one thread will only run if its sister thread is waiting for something, like a memory read

pauska

@ewwhite this is not the wrong way to do it, actually

Andrew

sigh, bought a wireless charger on ebay and the seller has just told me it's white, not black. Do I care?

ewwhite

VMware handles hyper threading quite well, though... but not for what this guy is doing

pauska

some database workloads out there are virtualized like this.. much better HA

Michael Hampton

So I wouldn't expect much gain from hyperthreading for a compute-intensive task.

Andrew

06:37

Duct Tape, right?

ewwhite

@pauska you can't allocate all of the CPUs this way

pauska

Or are we not talking about 1:1 virtualization here?

are there any other vms running?

ewwhite

@pauska looks like one VM.

pauska

then it should work fine

Andrew

If I'm reading it right, he wants to use The Magic of VMs to render faster. But I don't get why doesn't just run bare metal.

pauska

06:39

there is however an option to force the scheduler to reserve cores more aggressively

ewwhite

@pauska Intel E5540 quad-core CPUs... the OP made a VM with 16 vCPU

pauska

@Andrew my guess is HA, like I said

some virtualize their old database servers this way, instead of using native HA (which usually requires you to upgrade the database)

Andrew

@pauska yeah, but it's not DB; it's rendering.

probably from his basement.

ewwhite

Michael Hampton

@Andrew No, he wants to use The Magic of VMs to run other jobs when he's not running compute jobs.

Andrew

06:40

@MichaelHampton oh! You mean like an Operating System!

pauska

@MichaelHampton that will also work actually

Michael Hampton

@Andrew I posted a pic of his render farm a while back.

ewwhite

Bedroom...

Andrew

also it's running Windows 7 as the guest (unless he lied when he configured the guest)

ewwhite

pauska

06:41

the days of a hypervisor reserving every single core/hyperthread out there is over

Andrew

@MichaelHampton you were not serious...

Michael Hampton

@Andrew Quite serious

Andrew

You. Are. Not. Serious.

Michael Hampton

Serious as an Oracle quote.

Andrew

Surely vmware doesn't let you do that?

no, hang on. What's his vmware host?

I feel like I need to buy some plane tickets so I can get over there and slap him.

Ry Jones

06:44

@Andrew please send his render farm to pc recycle while you're at it

Michael Hampton

Hell, I'll recycle them.

pauska

@ewwhite btw, why did you tell me to download the hpsa offline util? Can't I configure the array in the boot menu?

ewwhite

@pauska No.

The BIOS is only limited functionality

The offline ISO will allow you to configure some advanced settings... e.g. disable RAID cache, set a logical drive whose size is a bit smaller (over provision) and is a clean way to handle the configuration.

pauska

alright

I thought I could set these through the rom setup

ewwhite

yeah, only basic configurations.

it's why most people don't know HP controllers are capable of more things

Iain

07:26

G'day

pauska

@Iain g'day matey

no rain forecast (!) today

maybe there is hope

Iain

Yesterday we had a lovely, warm day with clear blue skies - today we're back to dreary grey and rain :(

RobM

08:22

not very bright here either @Iain

dawud

08:49

morning all

RobM

09:33

morning

pauska

:(

tombull89

Replacing the hard disk in one of the Acer Revo machines we use as a digitial signage PC....you've got to take the f^$*Iing motherboard out to replace it.

pauska

09:55

maybe I should have used SLC USB sticks in these esxi servers after all

pauska

10:06

0

Q: Lower ping to my server (EU) from external countries (US)

I have a server located in Germany (EU) and I host a gameserver. I want to lower the ping from external countries like USA to allow them to better connect to my server. If I buy a server in US and then connect with VPN to my DE one, will the ping lowered? There is another way (even expensive) t...

linux vpn ping latency

Alvin Wong

10:18

rm -rf /

ls

Tom O'Connor

10:33

Dafuq.

RobM

shit.

There's probably no good way to drop something like that on someone but ringing them out of the blue at work seems especially cold

Tom O'Connor

@RobM It does seem excessive.

pauska

it does

Tom O'Connor

50% of all marriages end in divorce. The other 50% end in death.

Iain

@TomO'Connor 100% of all lives end in death too

pauska

10:37

@Iain I suspect that it was part of the punchline..

Tom O'Connor

@pauska It was from an Anti-valentines card my colleague got. (different one, incidentally)

but that would have been even more wrong.

Iain

Dear $deity serverfault.com/questions/576127/… this guy is a mess

tombull89

his name sounds like he's gargling marbles.

Tom O'Connor

0

Q: solving double hop without installing Active Directory

Can I solve double hop without installing Active Directory ? Does MS sql-Server enterprise manager require active directory? Thank you! My scenario: Dot net 4.0 IIS7 WCF app SQL 2012R2 standard No Active Directory authentication mode="Windows" in web.config App is hosted on server1 , db is...

windows sql-server

?

Iain

@TomO'Connor no idea

Iain

11:01

What serverfault.com/questions/576118/… ? How can you not understand how raid 1 works

Dan

Seriously, @MarkHenderson

20

Q: Informing customers about the death of an employee

If you have an employee who has an impersonal, but professional relationship with some of your customers (say, an account manager or a sales representative) and the employee passes away unexpectedly, should you inform your customers that they have passed? Or should you just treat the situation as...

customer-service death

I can't believe you'd even consider not telling people

RobM

Depends on the relationship, I reckon

Dan

@RobM I agree it potentially depends, but I suspect for most people that deal with customers more would be on the "should be told" list than not. If I died, I'd be (in principle, obviously) pretty offended if the people I worked with never knew

RobM

Yeah, I know what you mean

Dan

And if I were a customer, I'd be furious to be told "[x] has left the company" and then when casually asking what they're up to I was told they died

pauska

11:11

If something like @Dan just described would happen to me I would terminate the contract

without a doubt

RobM

Again... I'm with you... but equally I think some others would not be so bothered. So I'd try and gauge the person's level of interest and give them the information they wanted to have.

Dan

@RobM But what negative can there be in telling people who don't really "care"

pauska

It depends

RobM

-3

Q: does raid 1 backup also backup mysql updates?

I have a mirrored RAID 1 server. This server has mysql databases. If I run a query to update a mysql database, does this update also get updated on a RAID 1 mirrored setup or do I need a different way to backup mysql data?

mysql raid1

^ RAID 1 BACKUP? OH GOD

pauska

if a SMB salesperson dies, and he had ~2000 "customers" that he mass spammed every day then yeah, maybe sending out a new mass mail about that person passing away isn't the best way

RobM

11:12

Precisely. ^ This, But if it's someone I had a good working relationship with, yeah I'd want to know

Dan

I suppose, to me, the key point is that in the question it's a response to someone asking

Yeah, you don't want to spam all of your customers with the news that a random person has died - but I think any "real" customer should be told ASAP and anyone querying should be told the truth

RobM

oh absolutely

Dan

11:38

Anyway, good morning!

This question made me a little sad

2

Q: Could I use LinkedIn to improve visibility WITHIN my company?

I have a profile which I have not updated since early in my current job out of concerns that it might signal lack of loyalty. One of my greatest assets my superiors have lauded as a reason to promote me twice is that they trust me and that I was loyal to the company throughout multiple ups and do...

professionalism promotion linkedin networking international

RobM

very much so

pauska

12:35

@RobM were you the one who has that wireless/network projector server thingy?

RobM

@pauska nope. We experimented with using ipads and an apple TV but this place won't pay for proper wireless projector stuff

it might have been @tombull89 that had the wireless setup?

pauska

hmm someone here had it

Stack Exchange

The Nubby Admin: How Can I Determine What SSL/TLS Versions Are Available for HTTPS Communication?

posted on February 17, 2014 by Wesley David

Sometimes you’ll want to check the availability of various SSL/TLS versions when working on HTTPS communications. In my case, I had to disable SSL 2.0 on a server and I wanted to test and verify no SSL 2.0 communication was available after making the changes. By default my server negotiated to the highest possible supported version of SSL between it and the client, but that wasn’t g…

RobM

Yeah I remember us all talking about projectors.

ewwhite

13:03

Running 8 vCPU's made the render preform worse, from 88% of the real hardware down to 76%. As I expected the hyper-threading argument is pretty much bull shit. However updating did seem to help - getting 90-91% now which is definitely a step in the right direction. However I still cannot get the host to give up more than 26 GHz (seen in picture 1) which is driving me crazy. — Cody Smith 4 hours ago

I quit.

RobM

@ewwhite never argue with an idiot. They'll drag you down to their level and beat you with experience.

ewwhite

I made sense, right?

RobM

yes. I wasn't being flippant, I was seriously saying its pointless talking to someone who doesn't want to listen.

I read that question this morning when i glanced back through SF and saw it pop up.

ewwhite

:(

pauska

13:29

@RobM You'll love this one..

Hyper-V and ICS running on a domain controller. You're practically begging for trouble. — pauska 3 hours ago

RobM

what the holy hell are they playing at?

There really is no excuse for that given that you can just virtualise them into separate VMs on the same host hardware within the cost of the licence anyway.

MDMoore313

I think what's really needed is a boot.wim that's boots up to the Apple OS, not sure if that exists or if one has to be cobbled together

7

Q: Netbooting ALL types of OS'es

Is there a service out there that lets you boot all types of OSes? I've been using WDS but so far I've not found a way for it to netboot Apple as well. It's all windows/wim files. Would using DeployStuido be an ideal system? I maintain 100s of machines and they vary from Windows XP to 7 and all...

windows networking apple

Windows & Linux of course are already taken care of

RobM

I know it can be done. SCCM 2012 with the parallels Mac agent supports booting mac OSX clients and deploying Mac OSX from SCCM.

tombull89

@RobM nope, not me

We also do iPad to Apple TV but our projector are laptop dock > cable to wall > cable to board > cable to projector.

ewwhite

13:45

@RobM He's making a render farm..

MDMoore313

@RobM I figured since sccm rides on top of wds. I found instructions on creating a mac network boot image, but haven't tried it or know anyone who deploys OS X via the network in production support.apple.com/kb/HT5599

RobM

we've been deploying stuff via netboot for years. We have about 80 macs to manage and it works really well with deploy studio on a mac-based server

MDMoore313

@RobM so mac-based server == mac mini? Now that the rack-mount mac servers are a thing of the past I mean

RobM

IIRC SCCM doesn't support deployment of OS images to macs natively but if you add the Mac SCCM agent and proxy from parallels to your SCCM install then it works. I think its also do-able with the Dell deployment tools, including a Quest plugin for SCCM

@MDMoore313 we still have a 'proper' mac server that's got another year or two of life in it, but yes if we replace it then it will need to be with a mac mini.

We'll probably just start doing OS deployments from SCCM via the parallels tools at that point though.

Basil

morning

ewwhite

13:53

morn

RobM

the disk images are about 80Gb and I don't fancy trying to mass deploy an image that size to lots of disks at once from the slow mac mini disk

ewwhite

WOW... (this XKCD)

2

This comic shows estimated average frequency. I wanted to include the pitch drop experiment, but it turns out the gif format has some issues with decade-long loops.

RobM

clever

ewwhite

"Someone has sex in North Dakota"

RobM

I dunno. Not that I've been there but that's not a very sexy place name.

ewwhite

13:57

@RobM Oh, it's a freak fest...

MDMoore313

@RobM 80GB?

ewwhite

@RobM Inside Fracking's 'Man Camps', Where Sex, Drugs, and Gonorrhea Run Rampant

“Hookers go for $300 a pop,” said the oil worker, who spoke on condition of anonymity. “But if you see a woman in a store or on the street, they get nervous when you simply say 'howdy.' Some go into panic mode because of the crude guys around here. ”

RobM

Yeah about that. A full install of the Adobe Creative Suite, all the Final Cut Studio stuff, garageband and all the trimmings & extras, Office...

tombull89

I swear it's speeding up (that XKCD)

RobM

@ewwhite I... don't know what to say about that!

tombull89

13:59

Our xServ is being replaced this week with a Mac Mini :(

cole

Sup

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