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9:09 AM
We've got the tag [windows-8-server]. Can we kill it?
 
@tombull89 is there such a thing :s
 
@Sathya No. It's Windows Server 2012.
 
@tombull89 okay
@tombull89 done
 
@Sathya Gracias.
Ooh. Samsung 256GB SSD for £130.
 
9:41 AM
@Sathya: ahh, may be a good way to trawl for qyestions
 
It's really a pain that stylebot styles apply to all subdomains :\
Why do we get all questions dropped into the news feed now?
That's really annoying
 
Oliver Salzburg has stopped a feed from being posted into this room
 
Oops
I guess those were not my personal settings :D
 
Bob
...
This answer:
0
A: What version(s) of the .NET framework are included in windows 8?

Akshat MittalSeams like .net Framework version (until) 4.5 is already installed as listed here. Also on this page, under the 'Instruction', there is a Note specified which says: Windows 8 and Windows Server 2012 include the .NET Framework 4.5. Therefore, you don't have to install this software on those oper...

I actually watched him copy the list from the other answer/edit it in letter for letter
Note the typo'd lower case t on one of the .NEts -____-
 
@Bob Yes, people do that
 
Bob
@OliverSalzburg Not a good thing, though :P
 
@Bob A tip: don't try to call them out on it :P
 
Drat. Wish I knew about the Windows 8 compo earlier, there's some nice prizes up for grabs.
Wait. is there any caveat about locations for shipping?
 
Bob
10:02 AM
@OliverSalzburg Point taken :)
 
10:16 AM
@tombull89: not too late to start. Caveat is if they can't ship you the prize, they'll reimburse it if you buy it yourself
 
Now with top bar \o/
 
lol
@Bob why else do you think I go for those sorts of questions first? ;p
Low hanging fruit. I just offer better answers, with screenshot. Boom ;)
hmm
does total rep a day top out at 232?
 
@JourneymanGeek No, there is no upper limit
 
So I noticed. Someone just upvoted me ;p
 
11:04 AM
@Sathya: creating a shortcut to "C:\Program Files\Nightly\firefox.exe" -metrodesktop opens up the metro version of firefox for me... in the normal desktop
 
11:15 AM
hm, apparently the spammers have worked out there's an increase in SU traffic
 
Bob
11:26 AM
@JourneymanGeek lol
Sounds useful :P
So you get the Metro interface in a Desktop app?
 
lol
oh, wait
ya, thats about it ;p
 
Bob
@JourneymanGeek So.. it's not an actual Metro app, just FF's attempt at a Metro interface?
 
@Bob: Its eventually going to run in metro
Its a nightly, and well, took some digging to even get that to 'work'
 
Now I actually need the eastern language support in Foxit reader.... and their site is down O___O
 
11:51 AM
@JourneymanGeek nice, thanks. Off to Super User to ask it :-D
@JourneymanGeek there's no upper limit from accepts/bounties
 
I was afraid I wouldn't hit any level, but got 4/5 +3 now I woke up which still looks promising; or in other words, I'm coming for you guys! :P
 
lol
I am ALMOST at level 3
@Sathya: darn, headed out now
 
@JourneymanGeek waiitttttt
 
XD
I will stall my parents until I can do this ;p
oh NVM
they arn't ready yet @Sathya, go ahead ;p
 
Wooohoo Raspberry Pi arrived. Now what.
 
12:02 PM
0
Q: How do I get the Modern UI of Firefox in Windows 8?

SathyaMozilla mentions Elm is the experimental repository where most of our Metro development work has been happening. Now, I grabbed the latest nightly from the Elm repo, installed it & then despite starting it from the start screen, I was still provided the desktop version. Is there a way ...

go.
has to be an Indian. Always.
-7
Q: How about if a girl looking at me inside office?

BalajiCan I initiate a talk with a girl who often looks at me with a soft grin on her face?

 
lol
@Sathya: done ;p
 
@JourneymanGeek vary naice
@JourneymanGeek you shall get the upvote tomorrow when the rep cap is not in place ;P
 
12:19 PM
user image
5
 
woohoo! Go @JourneymanGeek!
I think @JourneymanGeek's totally going to get a Surface
 
12:33 PM
Oh, @JourneymanGeek, you git.
 
well @tombull89 you can still go for it.
@tombull89 SSD or monitor, no?
 
@Sathya My bad
Don't know, think all the questions have been pretty much asked by now.
 
can still answer
 
@tombull: that's what I thought. Win 8 is suprisingly annoying
Aka lots of questions and answers
 
I'm off 2 votes for Lvl2
 
12:45 PM
@Sathya Not sure, just gave you one to +3.
 
@JorneymanGeek congrats.
I figured nhinkle would get there first lol
 
@r.tanner.f Well yeah, I believe he said he would post questions today but I guess he's still sleeping / elsewhere.
So he might catch up.
But well, it mostly comes down to lucky votes on your questions / answers.
Although more of them helps.
 
Wait. I did ?
 
You did what?!
 
@JourneymanGeek Level 3 prize, dude.
 
12:53 PM
Get to level 3. on my phone. Second class UI. :)
Cool. Looks like my tactic of lots of screenshots and cussing @ win 8 works.
It's not bad, just annoyingly different.
I cannot squee properly on this.
 
1:22 PM
Question... I am currently running an NFS mounted home filesystem which is reporting 100% full even though a df shows otherwise (~25%). How can one correct this?
 
@LordStryker What is reporting 100% full? Since NFS is client and server, you're going to have to specify which box you are reading the values from in both cases.
 
df -sh shows 100% full on our nfs home directory
 
OK, but is that on the client or the NFS server?
 
The NFS server
 
do you have any kind of quotas in place?
 
1:25 PM
None that I am aware of. Our user directories in /home are nowhere close to the size of the HDD on which our /home directory is mounted (when running du -sh)
 
what is the underlying filesystem being used to store the data on the server?
 
Reiser
 
reiserfs3? hmm... haven't seen that one in production use in a while, but i don't think it would encounter resource limits
have you tried taking the NFS server offline (take down NFS daemons) and run fsck on the volume storing the home directories?
 
This has happened in the past where we had some runaway .nfsXXXXXX files being created and .xsession-errors files filling up but this time around it is no the case
I have not. We have a lot of clients linked in right now at the moment and I was hoping to avoid bringing down nfs
The server has not been restarted in about a year.
 
okay, so if the server itself is reporting that the reiser partition is 100% full, and that reading has nothing to do with nfs (as df shouldn't, on the server, at least), then at least we know that the fact that it's NFS isn't responsible for the problem
the question should be rather, why is NFS only reporting that it's 25% full to the clients :P
since you said it is only 25% full, I'm assuming you're getting that reading from a client
I'd trust df on the server (which comes directly from the filesystem on the HDD, which is what you care about) over anything NFS says
 
1:28 PM
The client side says 100% as well (sorry I was confused).
 
oh, okay
 
But if I to a du on all the directories in /home, it doesnt add up to the availalbe disk space on the HDD
it only comes to about 25% which is normal for us.
 
the sum of du doesn't necessarily equal df... there are things like filesystem metadata, which consume disk blocks, but are not accounted for as actual files
 
Usage began to rise on Friday and between that time and today it shot up to 100% yet the home directory sizes don't reflect this.
Right. So that is what we are trying to track down now. nfs stale handles, etc.
As of this moment I still havent a clue what caused it, or how to fix this without messing with the server.
 
is the NFS mounted /home directory the only thing on the partition, or are there other things (system files, etc) on the same partition? (note: partition, not disk. don't care about the rest of the disk, really)
 
1:31 PM
It is the only thing on that partition
 
hmm... I am trying to see if there is an online fsck for reiser3 that will tell you whether the filesystem is corrupt without making any changes
 
That would be wonderful if there is such a thing.
 
reiserfsck --check <partition device node> -- but before you do it, run reiserfsck --help and get a feel for the command line options
i.e. don't take my word for it; read the manpage and/or --help entries
also the functionality might depend on the version of reiserfsprogs that is installed
judging from the fact it's a production box that's been up for over a year, it's probably quite old, but i don't know when the --check option was introduced or when it gained online support
 
I will look into this. Thank you very much.
 
you might also want to check smartctl manpage here to make sure that the disk(s) {it,them}sel{f,ves} aren't damaged or failing
 
1:44 PM
I believe the problem is stemming from two of our clients who probably clock in the most usage/time on their machines relative to everyone else. I told them a periodic logging out could help stem this problem but I'm unsure if that is the case.
A peer of mine believes that disk usage is 100% due to memory being reserved for open processes and it never gets released.
To be honest I don't know enough about unix to even know/guess as to what is really happening.
I ran resiserfsck --check on a local partition just to test it and it cannot read the superblock
 
@LordStryker disk usage wouldn't be related to memory; furthermore, I can't think of any release of Linux in the past 5-6 years that has had issues with not releasing userspace resources after a process exits
even if a process was taking up its full allocation of file descriptors, that still couldn't impact system-wide
@LordStryker ah, it probably only works on partitions that aren't mounted
it'd be nice to know a bit more about what we're working with as far as versions of packages (yes, it matters a whole lot to those of us with experience) -- Linux kernel version, distro version, list of any packages that have been compiled from source to a different version than the distro, etc.
also the hardware -- is it RAID? hardware RAID? software?
and what protocol? PATA? SATA? SAS?
 
Well we don't have RAID setup I know that. :-\
The server runs opensuse 11.3
 
were this not a production box, my first kneejerk reaction would be to apply any distro updates to the system and reboot it... it's a fairly interesting problem space to try and fix an issue like this without bringing the service down (in your case NFS), but depending on the amount of money projected to be lost due to downtime, you could just wait until after hours, low activity period, etc and try it
also... I really can't bring myself to being comfortable with reiserfs as a production FS, particularly when you throw NFS into the mix and the lack of RAID
 
Kernel 2.6.34.7-0.7-desktop
 
oh okay, so semi recent ish... yeah that throws a lot of my theories out the window :P
 
1:55 PM
Our boss swears by ReiserFS so that is why we use it.
any other commands I can run to check versions/protocols/etc. that could potentially help?
He just got back and he's getting to the point where he's going to just reboot the sucker :(
Which spells bad news for our clients running on the queue... really hoped there was another way to do this.
 
probably not a bad idea; but before restoring service, definitely run reiserfsck --check on it while it's unmounted
 
Yeah that's what he wants to do.
 
given the time pressure (boss going to reboot it) I'm not sure what else can be done -- but it gave me a good chuckle that the boss swears by reiserfs
at least xfs please... lol
I mean, reiserfs doesn't even have CRC
it's really not a server FS >_>
 
... I'm going to try not ti make a typical murder joke
@LordStryker: yanno, considering all that detail, you might want to see if that might be a good fit for SF
While they're grouchy, they're really smart good folk ;p
 
Grouchy? That's pretty generous. :P
 
2:01 PM
@JourneymanGeek the thing is, there's time pressure... so while it might be an interesting question for education purposes, such as "what can be done to attempt to troubleshoot an online reiserfs volume?" it's unlikely to help him now
I like more dynamic filesystems like btrfs... that thing... is so amazingly flexible... I wouldn't be surprised if it can shrink itself, online, simultaneously with checking and repairing the inode table, while changing the compression type on files from lzo to lzma, while defragging :D
 
@allquixotic What FS would be a good NFS one?
@JourneymanGeek Yeah I try to avoid SF whenever I can :-P
 
@LordStryker I sit in their chat all day just to absorb information
it's slightly poisonous, but I think it might be worth it...
 
@LordStryker Hah, they're not all bad. Although ReiserFS always get a bit of a kicking.
 
@LordStryker filesystem wars is something better left for SF, but I can say that the consensus seems to be somewhere between ZFS (for crazies and Sunnites/Oraclites); ext4 (for Ted T'so fans); XFS (for SGI/RedHat fans or people who are sold by the "big and lots" mantra); or btrfs (for people who like experimental, dynamic stuff that's going to be awesome Real Soon Now (tm))
basically, anything but reiserfs or jfs
also depends on volume size, number of files vs. size of files, etc
for absolutely enormous, eye-popping sizes of volumes and/or the files themselves, xfs pretty much wins; even the crazies agree on that
btrfs has good data integrity and almost anything you want to do with it can be done "online" (without unmounting)
ext4 has great performance and good scalability but is somewhat lacking on online features compared to btrfs, as well as data integrity
 
Well the boss man is going to 'try a few things' before rebooting... If anything works I'll post it here but don't hold your breath.
 
2:08 PM
ZFS supports software RAID5 better than any other filesystem but it's not running at full steam / feature support on Linux quite yet; its home domain is Solaris or BSD
 
The thing I'm worried about is this will just happen again in a few weeks time...
This really is the 3rd time its happened (usually over the course of a couple days usage rises up to 100%...) but this time around .nfsXXXX files and the .xsession-errors files are not the culprits
 
you are taking the FS size readings as root, right? for du and df?
 
correct
 
du won't be able to report size for anything that it doesn't have execute permission on, although as root, all discretionary access controls are ignored
so unless you have mandatory access control and somehow lock out root with an integrity level or something
oh, another possibility
you could have a situation where a directory branch is removed from the dirent table but it still contains inodes within it that occupy space
think like a tree's branch breaking off... the filesystem still knows about the "leaves" on the tree but it can't list them because it's not connected to the tree trunk, it's on the floor
that's one type of filesystem corruption
 
I wonder if there is anyway to force fix this without consequence or to even check if this is happening.
We just shut down all the clients so I assume he's going to reboot the dang thing soon.
 
2:14 PM
no, there's no way to force fix that with reiserfs
btrfs has online fsck support, so it can detect and repair problems like this without unmounting or booting off clients
 
I'll be sure to mention this to him.
 
you might want to be carefully diplomatic when broaching the topic, but since this sounds like a production system, I probably wouldn't go with a limited support release like OpenSUSE 11.3, and I probably wouldn't go with a filesystem without online repair and CRC verification support.
 
ahh nice to be back on a PC...
 
if it were me and I could start over, I'd put RHEL6 on it (or one of its free-as-in-beer binary rebuilds, e.g. CentOS or Scientific), or an officially long term supported build of SUSE (note, not OpenSUSE), or Ubuntu 12.04 LTS. Then I'd put xfs or btrfs on it.
 
@Sathya @r.tanner.f @tombull89: thanks ;p
 
2:21 PM
And I'd probably also get at least RAID-1, though more likely RAID10 if it were possible to afford it
 
@TomWijsman I think there's a certain element of tacticalness. I am intentionally trying to answer or ask just enough questions to fill the bottom level of things (that is to say, those 3 rep ones)
 
How stable would you consider BTRFS?
 
@LordStryker: It won't eat your data, but there's a ton of new features being adde d
 
He wants something rock solid (like, and i quote, "like ReiserFS")
 
@LordStryker: ReiserFS isn't really supported any more
 
2:25 PM
Next best FS? He may be willing to switch but he wants it to be rock solid.
 
ext4 or xfs is what I'd trust.
 
@LordStryker I would consider btrfs to be fairly stable on enterprise distros. on vanilla upstream kernels or Fedora or something it's not that stable because of all the flux
but OpenSuse, RHEL and Ubuntu LTS try to close off the bugs and corner cases to make a good build of it
almost anything that makes it into RHEL is going to be rock solid
 
@allquixotic: I rather doubt RHEL or centos has btrfs tho
I mean, centos is still on the old version of gnome. Not that thats a bad thing.
 
:)
it "has" it, but it's called "not a production filesystem"
thing is, the only FS I'm aware of that does online check/repair is btrfs... and there does not exist a filesystem that will never encounter FS corruption during runtime, it's just not possible, especially in the face of bad sectors, etc
XFS does not do online check/repair; they say that their check tool (which is read only) reports "spurious errors" (incorrect information, essentially) unless the FS is unmounted or marked read only during the check
ext4 is no better
I think with RHEL 7 (whenever that comes) btrfs will be the no-brainer solution, as it should be production quality by then
OH!
I found an enterprise Linux vendor that's willing to support btrfs in true production configurations
SUSE also. so if you are an enterprise running a server and you want a production quality FS that your vendor will stand behind (including for support calls, etc), you can use SUSE (not OpenSUSE) or Oracle Linux
I imagine it's production quality in Oracle but not in RHEL because Oracle ships a newer kernel and they also house the upstream maintainers for btrfs, so they probably are better at testing it and integrating the latest code without breaking it
@LordStryker also if you don't know about ksplice, you and your boss need to be tarred, feathered and used as an organic fuel source in an exothermic chemical reaction with oxygen
ksplice + btrfs + oracle UEK2 = win
don't be afraid to pay a little... that way, if it DOES break, you call up Oracle on the phone instead of talking to lowlifes like me and say "HEY ORACLE, YOUR BTRFS BROKE MY SERVER!!!" and they'll give you instructions to fix it :p
 
*sigh He likes things that are free.
I suppose I'm to be used as an organic fuel source for an exothermic reaction. (coincidentally we are a science lab :P so how fitting)
 
2:38 PM
@LordStryker Oracle Linux is free
you can download it and use it for free; support is optional but highly useful
 
Ah. Duly noted.
 
ksplice isn't free, but then, most things that are fantastically awesome aren't.
here's a chemical reaction for you: hackers + kernel bugs + long-running OS = unpatched security vulnerabilities + unresolved bugs
ksplice removes the "hackers + kernel bugs" almost in its entirety, without requiring reboots of the kernel at all
doesn't even interrupt IP connections
 
I think I'm in a wrong place. Thanks for the barrage of -ve votes. I quit this place because something is wrong here. I'm blacklisting this site in my company, and I won't encourage my employees to use it. Thanks again — akula 5 mins ago
 
Well our cluster has one way in through a dedicated gateway that we keep patched.
 
SU Ragequit?
 
2:40 PM
@tombull89 sounds like that person is in a very wrong place, mentally :P
@LordStryker doesn't protect you against bugs though
 
Very true...
 
ksplice patches your kernel while it's running, in a way that's safe and tested and has never gone afoul for me in using it for about 3 years
resolves functionality defects as well as security
using patches directly from the upstream vendor of the kernel
 
Well i'll mention it to him but... I can almost guarantee you he isn't going to look into it, at least right now... :-\
 
@tombull89: most of those downvotes are win8 related
 
ksplice isn't expensive but i'd consider it high priority if you're going to do a rebuild / re-image
with the existing opensuse 11.3 / reiser thing i don't think it's important at all because your FS and OS version are already pretty silly for a production box
 
2:42 PM
As someone who is set on something like ReiserFS, he isn't into adapting the 'new' very often.
 
yeah i see that
 
@JourneymanGeek I get the feeling he's asking crappy questions to try and get some repz and some prizez.
 
@allquixotic Unfortunately I don't make the rules around here.
 
@allquixotic > Free for Fedora and Ubuntu Desktop.
 
Oh, tcsh is his favorite shell as well :P
 
2:43 PM
reiserfs was last considered (relatively) reliable about around the time when ext2 was popular and ext3 was experimental
 
@tombull89: precisely
 
@TomWijsman Fedora and Ubuntu Desktop are exactly the wrong kind of distro to use on a long-running server
support runs out and the patches stop coming in after about a year or so
 
True.
Haven't been following the conversation. :D
 
@allquixotic: yo dawg, I heard you liked desktops so I ran a desktop on your server
 
anyway I have a server that's been running a ksplice-patched kernel and it has several public IPv4 and IPv6 addresses and minimal firewalling, and it's never been hacked
 
2:44 PM
If i was running a server, ubuntu LTS, Debian, Centos or bust ;p
 
uptime is a year and a half
hardware RAID10 with ext4, although I'm not entirely satisfied with ext4, I'd probably go with xfs or btrfs if I could start over
just lucky that it hasn't crashed yet
@JourneymanGeek you did it wrong
 
I just want to be able to get back to work :(
With home full, everything stops...
 
@LordStryker short term fix: (1) reboot box into single user mode; (2) make sure home directory is not mounted; (3) reiserfsck --check /dev/whatever; (4) init 3 (or reboot if you're paranoid)
should make home un-full if it's FS corruption
 
@allquixotic: woof?
 
or kernel data structure corruption (the reboot would solve that)
 
2:49 PM
I think I'm in a wrong place. Thanks for the barrage of -ve votes. I quit this place because something is wrong here. I'm blacklisting this site in my company, and I won't encourage my employees to use it. Thanks again — akula 13 mins ago
k
 
long-term fix: backup the /home directory, wipe the system, buy a hardware RAID controller, install RAID10 disk array, put Oracle Linux on it with UEK2 and Ksplice and btrfs, and forget it exists until dust clogs up the CPU fan and overheats the box (this event will happen before the system goes down to due FS issues)
 
@allquixotic We just shut down all the clients and compute nodes so the reboot is imminent.
 
@allquixotic: The only problem I would see with this kind of technique is that some former bug can introduce something different in memory (the data part, not the code part) which will propagate itself. But the chance is small, and requires like a time span of some years.
 
I just forgot if URLs use forward or back slashes. need. moar. coffee...
 
@TomWijsman not totally rock-solid, true, but that makes data validation all the more important
 
2:56 PM
Like 4 years ago some bug set some data and some years later a patch that depends on that data being right bugs the system.
Or some kind of situations like that.
 
you can throw in ECC fully-buffered RAM, a UPS, and MAC/MIC for even more assurance
 
Well, someone needs to write something like this in an open-source way; that will yield some more defensive programming as they know it can be used more mainstream.
 
also, kernel warnings and bugs really suck in production systems, but they do happen
sometimes if they're severe enough they can cause a character device or block device to become unresponsive if the kernel freezes or kills the kernel task that bugged
 
@allquixotic Yeah, but to be clear, but was talking about something "introduced" by a former kernel version that bugs something in a later kernel version. So ECC won't help here...
 
Red Hat spends a lot of effort trying to get their enterprise kernels to the point where they just don't do that
 
2:58 PM
Anyhow, I'd suppose the patch would be widely tested on similar ksplice systems so it might not make it onto your production system if such bug would happen.
 
going from "this is a cool new feature! 8-)" to "runs without a hitch for 5-10 years" is a lot of work
 
It's Oracle, they sure have some labs I'd think.
9 hours ago, by nhinkle
a reminder for all you non-mods: there's a lot of... sub-par content coming in with the contest. so it goes. please make good use of the review queue, and your votes! we'll be staying on top of the flags and close queues as well as we can, but we need some help with all the extra attention we're getting
 

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