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Re: [CentOS] Create Virtual Machine via HTTP or FTP
by cbulist＠gmail.com 09 Feb '12

09 Feb '12

On 02/08/2012 06:42 PM, lists-centos wrote: > > ------------ Original Message ------------ >> Date: Wednesday, February 08, 2012 06:21:17 PM -0600 >> From: cbulist(a)gmail.com >> To: centos(a)centos.org >> Cc: >> Subject: [CentOS] Create Virtual Machine via HTTP or FTP >> >> Hi, >> >> I'm trying to create a Virtual Machine using Network Install mode >> (I tried HTTP and FTP). >> The HTTP/FTP server where the installation files are located is >> the Host Machine. >> The URL that I'm using is: http://192.168.1.104/inst and the >> Automatic detect option detects the OS without problem. >> When the installation starts I got an error: >> Unable to retrieve >> http://192.168.1.104/inst/images/install.img >> >> I tried different path but I always get the same error. >> >> The host machine is a Centos 6.2 (2.6.32.-220.el6.x86_64) >> >> I really appreciate any help with this problem. >> >> Thanks in advance, >> >> >> > Having just done an http-based net-install the other day and having > had to fix up where some files/directories were ... > > Look at the error log on the httpd server (in conjunction of your > document root, etc.). That generally makes things clear. I.e., it's > likely looking for that directory/file at a different level from > where you actually have it. > > > - Richard > >

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sar -n DEV does not show bonded interfaces
by Sean Carolan 08 Feb '12

08 Feb '12

Anyone know how to get statistics on bonded interfaces? I have a system that does not use eth0-3, rather we have bond0, bond1, bond2. The members of each bond are not eth0-3, rather they are eth6, eth7, etc. I didn't see anything in the man page about forcing sar to collect data on specific network interfaces.

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Centos 5.6 3ware raid 5
by Ken Smith 08 Feb '12

08 Feb '12

Hi, I've seen comments about the poor performance of these cards with raid 5 configs. I have an old card with 3 x 500G IDE drives connected in raid 5 and I'm getting around 10mb/s write performance. :-( I'm seeing high iowait figures at times and associated very high cpu load average figures, probably because, under load, everything is stacked up waiting for the disks to actually do something. A non-raid sata disk in the same machine manages 70mb/s Does anyone know what the performance is like if I used the 3ware just as an IDE controller? I could then switch to software raid5? Thanks Ken -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Re: [CentOS] Preparing to convince to shift to non-propriety documents formats
by Dotan Cohen 08 Feb '12

08 Feb '12

On Wed, Feb 8, 2012 at 12:52, Boaz Rymland <boaz.rymland(a)gmail.com> wrote: > Hi Dotan, > > thanks for taking care of this. Attached is one such document. No problem at > all in making it public. It was pretty much so in the first place. > Here are the two bugs: Severe MS Office incompatibilities https://bugs.freedesktop.org/show_bug.cgi?id=45769 https://issues.apache.org/ooo/show_bug.cgi?id=118889 -- Dotan Cohen http://gibberish.co.il http://what-is-what.com

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PCIe AER support in 5.5
by Baylis, Neil 08 Feb '12

08 Feb '12

I have a question about getting PCIe advanced error reporting to work on 5.5. The info I need to start with is the following: 1) Is PCIe Advanced Error Reporting (including error injections) known to work in 5.5? 2) What configuration options do I need to select in order to enable it? I'm using the following configs: CONFIG_ACPI=y CONFIG_PCI=y CONFIG_PCI_DIRECT=y CONFIG_PCI_MMCONFIG=y CONFIG_PCIEPORTBUS=y CONFIG_PCIEAER=y CONFIG_PCIE_ECRC=y CONFIG_PCIE_AER_INJECT=y CONFIG_PCI_DOMAINS=y CONFIG_PCI_MSI=y I also have the kernel boot parameter aerdriver.forceload=y With this config, I see that the relevant devices appear to support Advanced Error Reporting (visible in lspci -v output). However, when I attempt to inject errors to them the injections fail for various reasons. None of them (out of about a dozen candidate devices) succeeds. The aer_inject facility is currently the only means I have of testing this functionality. Note that on the same hardware with a RHEL-6 based (2.6.32) kernel, the injections work correctly. I need to make them also work with 5.5. Before I go and track down those various errors, I want to verify that I have the right kernel and that it's configured correctly. The required code seems to be present in the kernel. I suspect there's something going wrong during driver initialization and device probing. Once again, I need answers to these two specific questions: 1) Is PCIe Advanced Error Reporting (including error injections) known to work in 5.5? 2) What configuration options do I need to select in order to enable it? Thanks, Neil Baylis

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Centosplus src rpm
by centos1＠iotti.biz 07 Feb '12

07 Feb '12

Hi all, I'm looking for latest centosplus kernel source rpm , which should be kernel-2.6.32-220.4.1.el6.centos.plus.src.rpm to date. Maybe someone could provide a link to it? Thank you Luigi

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about major version upgrades
by Mihamina Rakotomandimby 07 Feb '12

07 Feb '12

Hi all, In http://goo.gl/Krjfh I read: +++++++++++++++++++++++ Upgrading from CentOS-4 or CentOS-5: We recommend everyone run through a reinstall rather than attempt an inplace upgrade from CentOS-4 or CentOS-5 +++++++++++++++++++++++ Do you ever now if that advice will be up to date for the 6 to 7 upgrade? What is the preferred upgrade process if some want to upgrade inplace? I mostly run virtual guest in a one-VM-per-service (MySQL, php, Mail, DNS, NFS/SMB) basis, with a main + spare physical machine. I'm installing 6.2 on our dev servers and try to pre-evaluate the amount of work when 7 will be released. -- RMA.

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network intermitent, not sure if virtualization issue
by Bob Hoffman 07 Feb '12

07 Feb '12

I have a computer I am using to host a virtual machine. Centos 6, for both, 64 bit. The host machine's network connection seems fine. No problems. Trying to access the virtual machine is usually fine. but then, poof, ssh, http, ftp, all lose connection for about a minute. Then they come back up. I looked in all the logs on both machines, could find nothing, but not sure where to look. My question, would this be a setting on the VM as a webserver, some new centos 6 setting that just times out network when not in use? Or something that I did when I bonded my eth ports and bridged them? The bond covers the two onboard eth ports and one port from an add on network card. It is intermittent, seems to happen whenever, but service network restart on the webserver seems to fix it immediately, but it also just fixes itself too. is there some setting with centos 6 that must be changed to allow constant 'uptime' of the network?

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SSD Drives
by Matt 07 Feb '12

07 Feb '12

Has anyone installed a high I/O application such as an email server on SSD drives? Was thinking about doing two SSD's in RAID1. It would solve my I/O latency issues but I have heard that SSD's wear out quickly in high I/O situations? Something like each memory location only has X many writes before its done. Just wandering if anyone has tested it and if newer SSD's are better about this?

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Re: [CentOS] schily tools
by Dennis Clarke 07 Feb '12

07 Feb '12

> Let me comment some questions in one single mail: > >> My basic requirement with what I'm doing is to use standard tools and >> formats so that archives I write today can be readable in 10 years. > > Star becomes 30 in 4 months, any archive created since it's early > beginning in summer 1982 can still be read back. I have been using it for about a decade or more and anything I dumped has been a no brainer to retrieve, on any other OS or even architecture. >> I don't think there is any such general consensus. Are you reading >> something that favors Solaris/*bsd over GNU based systems? > > Schily tools (and in special star) implement support for Linux specific > extensions. This is what you do not get from gtar at all. So why do Linux > distros prefer gtar even though there is no Linux support? Is there any correlation between this and the warning message I see during a bootstrap like so : Warning: *** /usr/src/linux/include contains broken include files *** Warning: *** /usr/src/linux/include is not used this reason *** Warning: This may result in the inability to use recent Linux kernel interfaces Warning: *** linux/ext2_fs.h is not usable at all *** Warning: *** This makes it impossible to support Linux file flags *** You may try to compile using 'make COPTX=-DTRY_EXT2_FS' >> I doubt if they are as well maintained in linux distros as the GNU >> tool set, particularly in terms of having recent fixes backported into >> the versions carried in enterprise distros. > > gtar still did not fix bugs I reported in 1993 (e.g. the bug that > causes gtar to complain with "skipping to next header" even on it's > own archives). I am thus sure that star not not worse than gtar.... There seems to be something missing here. The subject was "schily tools" which is a lot more than star : root@rsync:/etc/default# ls /opt/schily/bin bosh cdrecord isodebug mdigest pfsh sfind star ustar bsh change isodump mkhybrid pxupgrade sformat star_sym ved btcflash compare isoinfo mkisofs readcd sgrow suntar ved-e calc copy isovfy mt sccs sh tar ved-w calltree count jsh od scgcheck smake tartest cdda2mp3 devdump label opatch scgskeleton smt termcap cdda2ogg gnutar lndir p scpio spatch translit cdda2wav hdump match pfbsh sdd spax udiff care to comment on any of these ? Certainly bosh needs a few words. dc -- -- http://pgp.mit.edu:11371/pks/lookup?op=vindex&search=0x1D936C72FA35B44B +-------------------------+-----------------------------------+ | Dennis Clarke | Solaris and Linux and Open Source | | dclarke(a)blastwave.org | Respect for open standards. | +-------------------------+-----------------------------------+

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