Re: [CentOS] Storage Install and configure on Centos
Thank you John On Fri, Sep 19, 2014 at 12:36 PM, John R Pierce wrote: > On 9/18/2014 9:14 PM, Chandran Manikandan wrote: > >> Dear All, >> I would like to study and practice for storage in Centos 5 and 6. Could >> anyone guide me. >> >> What is cluster and Virtualization technology how to implement in our >> office. >> > > http://www.redhat.com/en/services/training/courses-by-curriculum > > > -- > john r pierce 37N 122W > somewhere on the middle of the left coast > > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > -- *Thanks,* *Manikandan.C* *System Administrator* ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] odd dmesg entries
On 9/21/2014 12:50, John R Pierce wrote: every so often, I'm seeing these in my dmesg output, and I'm not sure what they are? host[32625]: segfault at 0 ip 0040abb8 sp 7ff59d36bd40 error 4 in host[40+1b000] host[24560]: segfault at 0 ip 0040abb8 sp 7f4fa1c4bd40 error 4 in host[40+1b000] host[8354]: segfault at 0 ip 0040abb8 sp 7fa07330dd40 error 4 in host[40+1b000] Normally the "in $foo" bit at the end names a program or library. I wonder if the host[$foo+$bar] syntax revers to a KVM guest? It's odd that it's correlated in time with some automatic software RAID check you've got going there. Is the order segfault-then-md as a closely-spaced pair, followed by a gap in time? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] LS command bizzare behavior
Hi, My bosses are running into an issue, where we type "ls" on a nfs mounted filesystem, and files that are there are not listed... I thought it was pilot error until my big boss showed me... but we can vi the files, we can access them via other means if we know the name. Then once we have accessed them, LS now shows the files. We are running centos 6.5, we are accessing them via xwin-32 (which should not be the issue) I looked on google and found nothing discussing this...of course this has nothing to do with hidden files (dot in front) because once we access the files we can see them. Thanks Dan ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] LS command bizzare behavior
On Mon, 22 Sep 2014 10:48:32 -0500 Dan Hyatt wrote: > but we can vi the files, we can access them via other means if we know > the name. Then once we have accessed them, LS now shows the files. Sounds like a caching issue to me. After you have accessed the file, it's in the cache and you can see it. -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] LS command bizzare behavior
On 2014-09-22, Frank Cox wrote: > On Mon, 22 Sep 2014 10:48:32 -0500 > Dan Hyatt wrote: > >> but we can vi the files, we can access them via other means if we know >> the name. Then once we have accessed them, LS now shows the files. > > Sounds like a caching issue to me. After you have accessed the file, it's in > the cache and you can see it. More specifically, it sounds like a client-side caching issue. I've seen this happen on linux clients if I'm *really* fast on the trigger. --keith -- kkel...@wombat.san-francisco.ca.us ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS 7 installer
I dunno if this ours, or an upstream enhancement, but I was just rebuilding a 6.5 box with 7. I selected custom formatting. 1. It seems to autoselect *ALL* drives. I would strongly argue that it should *only* select the first drive, or whichever is already bootable. That could be disastrous if someone doesn't notice they're all selected. 2. There's NO BACK BUTTON once you get into the select mount points, etc, screen. The only way back seems to be a reboot. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] LS command bizzare behavior
So how do I fix it. We actually have a widespread problem with files and directories "disappearing"... as it is one user in particular it might be pilot error, but it might be this. Because this is happening to two competent users. On 9/22/2014 1:11 PM, Keith Keller wrote: On 2014-09-22, Frank Cox wrote: On Mon, 22 Sep 2014 10:48:32 -0500 Dan Hyatt wrote: but we can vi the files, we can access them via other means if we know the name. Then once we have accessed them, LS now shows the files. Sounds like a caching issue to me. After you have accessed the file, it's in the cache and you can see it. More specifically, it sounds like a client-side caching issue. I've seen this happen on linux clients if I'm *really* fast on the trigger. --keith ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 7 installer
Yes, imagine connected to your large data filesystems. Or worse yet, you have a data center power down PXE for some reason is set on all switches as the first choice and any mounted filesystem might get wiped... On 9/22/2014 3:06 PM, m.r...@5-cent.us wrote: I dunno if this ours, or an upstream enhancement, but I was just rebuilding a 6.5 box with 7. I selected custom formatting. 1. It seems to autoselect *ALL* drives. I would strongly argue that it should *only* select the first drive, or whichever is already bootable. That could be disastrous if someone doesn't notice they're all selected. 2. There's NO BACK BUTTON once you get into the select mount points, etc, screen. The only way back seems to be a reboot. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 7 installer
On Mon, September 22, 2014 3:14 pm, Dan Hyatt wrote: > Yes, imagine connected to your large data filesystems. > > Or worse yet, you have a data center power down > PXE for some reason is set on all switches as the first choice > > and any mounted filesystem might get wiped... I had an assistant a while back; he set up small server, and first boot choice was from first hard drive, second was pxe that was starting fresh system build (wiping all drives,...). He never changed that after the system was initially built with kickstart. Why, if it will always boot from the drive, right? One day on boot (upon reboot into updated kernel, I guess) system drive timed out... and his production box was wiped ;-). I bet he never leaves things like that since. Valeri PS Of course, we recovered all we needed to recover. My plan is: I have a good backup ;-) > On 9/22/2014 3:06 PM, m.r...@5-cent.us wrote: >> I dunno if this ours, or an upstream enhancement, but I was just >> rebuilding a 6.5 box with 7. I selected custom formatting. >> >> 1. It seems to autoselect *ALL* drives. I would strongly argue that it >> should *only* select the first drive, or whichever is already bootable. >> That could be disastrous if someone doesn't notice they're all selected. >> 2. There's NO BACK BUTTON once you get into the select mount points, >> etc, >> screen. The only way back seems to be a reboot. >> >>mark >> >> ___ >> CentOS mailing list >> CentOS@centos.org >> http://lists.centos.org/mailman/listinfo/centos > > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] X, why did it have to be X
I have one user. We've pretty much all got two monitors, but he insists on rotating both of them vertically - that is, they're taller than they are wide, and he's got a Radeon card. I always have X grief on his system when I update it I just did a full update. X comes up in both screens... but the left one is *not* rotated, while the right one is. And they're mirrored. I've logged in as root, looked at all the configuration I know of, and nothing tells it to mirror, or one rotate and the other not. But when I use the menu, and go to system->preferences-display, it shows mirror screens *always* checked. I uncheck that, and hit apply, and nothing happens. I move the one off from over the other, and rotate the other, and still, nothing at all happens, and I don't see anything written, anywhere. Suggestions? mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] LS command bizzare behavior
On Mon, 22 Sep 2014 15:12:07 -0500 Dan Hyatt wrote: > >> > >>> but we can vi the files, we can access them via other means if we know > >>> the name. Then once we have accessed them, LS now shows the files. > >> Sounds like a caching issue to me. After you have accessed the file, it's > >> in the cache and you can see it. > > More specifically, it sounds like a client-side caching issue. I've > > seen this happen on linux clients if I'm *really* fast on the trigger. > So how do I fix it. > > We actually have a widespread problem with files and directories > "disappearing"... as it is one user in particular it might be pilot > error, but it might be this. Because this is happening to two competent > users. Is fs-cache enabled? Have you read this: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/fscachenfs.html -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] X, why did it have to be X
m.r...@5-cent.us wrote: > I have one user. We've pretty much all got two monitors, but he insists on > rotating both of them vertically - that is, they're taller than they are > wide, and he's got a Radeon card. I always have X grief on his system when > I update it > > I just did a full update. X comes up in both screens... but the left one > is *not* rotated, while the right one is. And they're mirrored. I've > logged in as root, looked at all the configuration I know of, and nothing > tells it to mirror, or one rotate and the other not. But when I use the > menu, and go to system->preferences-display, it shows mirror screens > *always* checked. I uncheck that, and hit apply, and nothing happens. I > move the one off from over the other, and rotate the other, and still, > nothing at all happens, and I don't see anything written, anywhere. > > Suggestions? > A couple other things: the /etc/X11/xorg.conf that I fought successfully last year is still in place, but it acts as though it's ignoring it. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] LS command bizzare behavior
On 2014-09-22, Dan Hyatt wrote: > So how do I fix it. If it is in fact client-side, you have to fix the client. If these are Windows NFS clients then I am not much help. Perhaps the maintainers of the NFS client software have heard of this issue. If you have Samba already set up, it might be interesting to see if the issue shows up there too. If it does, then it may not be a client-side issue. If it doesn't happen under Samba then it's more likely to be client-side NFS. --keith -- kkel...@wombat.san-francisco.ca.us ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] X, why did it have to be X
Anything enlightening showing up in /var/log/Xorg.0.log? Maybe something explaining why your conf is being ignored? Kahlil (Kal) Hodgson GPG: C9A02289 Head of Technology (m) +61 (0) 4 2573 0382 DealMax Pty Ltd(w) +61 (0) 3 9008 5281 Suite 1415 401 Docklands Drive Docklands VIC 3008 Australia "All parts should go together without forcing. You must remember that the parts you are reassembling were disassembled by you. Therefore, if you can't get them together again, there must be a reason. By all means, do not use a hammer." -- IBM maintenance manual, 1925 On Tue, Sep 23, 2014 at 7:37 AM, wrote: > m.r...@5-cent.us wrote: >> I have one user. We've pretty much all got two monitors, but he insists on >> rotating both of them vertically - that is, they're taller than they are >> wide, and he's got a Radeon card. I always have X grief on his system when >> I update it >> >> I just did a full update. X comes up in both screens... but the left one >> is *not* rotated, while the right one is. And they're mirrored. I've >> logged in as root, looked at all the configuration I know of, and nothing >> tells it to mirror, or one rotate and the other not. But when I use the >> menu, and go to system->preferences-display, it shows mirror screens >> *always* checked. I uncheck that, and hit apply, and nothing happens. I >> move the one off from over the other, and rotate the other, and still, >> nothing at all happens, and I don't see anything written, anywhere. >> >> Suggestions? >> > A couple other things: the /etc/X11/xorg.conf that I fought successfully > last year is still in place, but it acts as though it's ignoring it. > > mark > > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] X, why did it have to be X
Apologies for previous top post. Gmail was being, well, Gmail :-( ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] (no subject)
___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
