Discuss

discuss@lists.centos.org

34753 discussions

RDAC for IBM DS4700
by Wahyu Darmawan 20 Jul '10

20 Jul '10

Hi all, I have problem with my servers. I use two of HP Blade Servers and RHEL 4.6 installed on them, and have IBM DS4700 connected to them. In those servers are running RHCS (Red Hat Cluster Suite) with GFS for handling Oracle Database. Yesterday, I had missing one partition from the storage, suddenly. I called IBM and they suggested to use RDAC. The question is, Why should use IBM RDAC for multipath on RHEL 4, and why HP Blade + HP EVA Storage don't use any addition plugins software to keep server + storage connection? I appreciate for some reasons by all of you. Thank you. Regards, Wahyu

2 1

Want MySQL source rpms pertinent to CentOS 5.4; what packages should I request via yum?
by Kenneth Wolcott 19 Jul '10

19 Jul '10

Hi; I want MySQL source rpms pertinent to CentOS 5.4; what packages should I request via yum? I first went to mysql.org but I could not find (perhaps I am blind) any MySQL source tarballs or rpms, only binary rpms. I would like to compile MySQL from source. BTW, what happened to centos.org? When using Firefox or Chrome it looks like it is text-only as if I were visiting it with lynx! Thanks in advance for pointers/advice towards answering a very lame question. Ken Wolcott kennethwolcott(a)gmail.com

2 3

Problem with yum
by James B. Byrne 19 Jul '10

19 Jul '10

I am experiencing a problem with yum on one of my CentOS-5.5 systems. Specifically, on Friday past (July 16), I ran yum update as root. Yum displayed all of the outdated packages and asked if I wanted to proceed. An answered yes. This first package downloaded was nss. At this point yum simply stopped processing or responding. A ctrl-c at the yum session terminal window did not interrupt the task. Top did not display any yum processes. I killed that particular process to regain the console session, but I had to use -9 because nothing else worked. Yum continues to behave in this strange manner. Any invocation of yum with any option just stops responding. Before I manually remove yum and reinstall it using rpm could anyone provide a clue as to what might be happening here and how it might be cured. I found this one entry from yum in the log files: /var/log/messages.1:Jul 16 00:14:43 gway01 kernel: Out of memory: Killed process 1380, UID 0, (yum-updatesd-he). However, this entry occurred some time before I attempted my update task later that same morning. I would like to be directly copied on any replies as I am a digest subscriber. Sincerely, -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

3 3

Finding DHCP IP of guest system
by David Dyer-Bennet 19 Jul '10

19 Jul '10

If I can log in to the guest through the console, I can of course find out what IP DHCP has assigned it. If I configure a static IP I can of course connect to the system there (if it runs services, the firewall allows it, all the usual caveats). Does there happen to be any way to determine from dom0 what IPs are participating in the network and which guests they belong to? (I'm configuring everything as bridged; basically I want to use virtualization to pretend I have a bunch of independent systems visible to the outside.) (I suppose just what the IPs are is enough; the number is small enough I could probe them until I found the system I wanted. Obviously this is for use when I'm having trouble getting in through the console but have some reason to think the rest of the system is alive.) -- David Dyer-Bennet, dd-b(a)dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info

12 29

Xen cpu requirements
by David Dyer-Bennet 19 Jul '10

19 Jul '10

I'm installing Centos 5.5 on a new Dell R301 server. I wanted to run Xen and have the full virtualization possibilities (this is our development support server, so it runs a few real services and is available for playing with things; putting the "playing with things" functions into virtual servers would protect the "few real services", and make it easier to clean up afterwards). I have enabled virtualization support in the BIOS. /proc/cpuinfo says I have model name : Intel(R) Xeon(R) CPU X3450 @ 2.67GHz and flags : fpu tsc msr pae cx8 apic mtrr cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida pni est ssse3 cx16 sse4_1 sse4_2 popcnt lahf_lm The "vmx" flag doesn't appear to be set. (I'm working from <http://www.centos.org/docs/5/html/Virtualization-en-US/ch-op-sys-support.ht…>, by the way; I note that document is from 2007 or maybe even 2006, so perhaps some things aren't fully up-to-date.) So, does that mean my Xeon-based server doesn't have hardware virtualization assistance? -- David Dyer-Bennet, dd-b(a)dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info

13 28

Desktop Supercomputer
by Rajagopal Swaminathan 19 Jul '10

19 Jul '10

Greetings, Have been looking at the specs of Boston Venom T4000. Boston Venom T4000 http://www.bostonindia.in/products/bos-t4000.aspx I could not figure out the lowest base price points, HA features and KVM support Yet to work out the storage part of say 8TB storage (with HA features, of course) for this beast. and accessability issues from devices. I am in the middle of trying to find out about What AMD has been doing in its end. and Lastly, wireless fencing devices Yet to look into easy monitoring and management tools. Any opinions please? Regards, Rajagopal

11 21

xm console -- what should I get?
by David Dyer-Bennet 19 Jul '10

19 Jul '10

If I type "xm console 6", say (when I have a virtual machine 6 running), what should I get? The documentation seems to indicate that I should get something that behaves like a telnet to a serial console. What I actually get is a connection that might show me a couple of lines of output that do look like they belonged on the console, but doesn't seem to accept any input (except that it does exit on the documented escape character ^[). These virtual systems show as running, and in fact with virt-viewer I can get a VNC console to them. Dom0 and the guests are Centos 5.5 x64, running on Intel processors with modern virtualization support (turned on in the bios, and it looks like Xen found it from xm dmesg output). -- David Dyer-Bennet, dd-b(a)dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info

6 5

Paravirtualized Centos 5.5 guest under Xen
by David Dyer-Bennet 19 Jul '10

19 Jul '10

The virtualization manual doesn't seem to say; does one have to do anything to get the Centos 5.5 paravirtualization drivers installed? Or is it sufficient to specify a paravirtualized guest, and the Centos install will then detect that and load the right things? And, is there a way to check in the guest that the right drivers are loaded? What are they? -- David Dyer-Bennet, dd-b(a)dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info

2 1

Re-exporting an NFS mount.. Possible?
by Kwan Lowe 19 Jul '10

19 Jul '10

I have an issue that is not all that unique, so I'm hoping someone has done it before. On the client end I have some very old RedHat based systems. On the server end is a Windows 2008 system running NFS server software. The clients mount the server resource as an NFS2 mount but some compliance issues were discovered with the setup. For various reasons, updating the client is not an option at this time. The fix the issue, the server needs to export NFS3 mounts but the clients do not support that version. As a workaround, I considered adding a third system running CentOS that would mount the server and re-export it to the clients. This will mitigate the current issue related to visibility of the share from certain groups. It does not appear possible, using the current kernel-based NFS server, to export an NFS-mounted filesystem. However, it appears that there is a FUSE NFS project that might work. Does anyone have any experience with such a setup?

6 15

Re: [CentOS] 2X app server alternatives
by John R Pierce 19 Jul '10

19 Jul '10

On 07/18/10 11:15 AM, Silviu Hutanu wrote: > Yeap, but it will be nice to be based on VNC, actually I use Ulteo > Virtual Desktop ( http://www.ulteo.com ) I'm trying to figure out if > there is a better alternative.2X app server is just an example of a > better alternative. > > NX could be also an alternative. I suspect you'll need to define what your requirements are before discussing alternatives to some commercial package. 2X runs windows apps on a windows server, using the RDP protocol. apparently if you're considering VNC and other such things, none of those are requirements, leading me to wonder just what your requirements are. otoh, this discussion really has nothing to do with CentOS per se.

1 0

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss