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34758 discussions

free
by Jason Pyeron 14 Jul '10

14 Jul '10

The man page does not say much, but does this mean I have only 396668 used by programs (used-cached)? Or shoul I be reading the 2nd line? [root@ten-212 ~]# free total used free shared buffers cached Mem: 7918844 5478820 2440024 0 111684 5082152 -/+ buffers/cache: 284984 7633860 Swap: 9961464 204 9961260 -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.

5 5

os that rather uses the gpu?
by Jozsi Avadkan 14 Jul '10

14 Jul '10

Does someone know a distribution/operating system, that rather uses the GPU for "working", not the CPU? [by default] Or this solution is still in the "beginning part"? Thanks for any tips, link, suggestions.

3 2

Re: [CentOS] GPT Partitions >2.2T with Centos 5.5
by Alexander Dalloz 14 Jul '10

14 Jul '10

>> I think ext3 is a bit slow on so big LUNS, try xfs or similar? > > there is no official support for xfs in RHEL5, so that is not an option. > Besides, I'm talking about a drop of >150mb/s to ~10mb/s read performance > when cracking the 2.2T size. This is clearly not in the ext3 (or FS for > that matter) magnitude of performance issues. Also, numbers stay the same > when dd'ing on the raw device (LUN). > > -Jens Hello Jens, I always used LVM to make LUNs from a NetApp SAN available to CentOS/RHEL 4/5 systems. Administrating several systems with multiple LUNs of +2.2TB and not seeing such a negative performance impact. Filesystem used is ext3. Regards Alexander

1 0

Re: [CentOS] Running yum shows errors
by Jens Neu 14 Jul '10

14 Jul '10

Hi, Did you try to disable the mirror selection and specify one single repo? -Jens ----- Originalnachricht ----- Von: Jatin Davey [jashokda(a)cisco.com] Gesendet: 14.07.2010 11:03 ZE5B An: centos(a)centos.org Betreff: [CentOS] Running yum shows errors Hi I am getting the following errors when i try to use yum to install the net-snmp paclages. [root@sc1 yum.repos.d]# yum install net-snmp Loaded plugins: fastestmirror Determining fastest mirrors Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 229, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 104, in main result, resultmsgs = base.doCommands() File "/usr/share/yum-cli/cli.py", line 339, in doCommands self._getTs(needTsRemove) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs self._getTsInfo(remove_only) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo pkgSack = self.pkgSack File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 591, in <lambda> pkgSack = property(fget=lambda self: self._getSacks(), File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 434, in _getSacks self.repos.populateSack(which=repos) File "/usr/lib/python2.4/site-packages/yum/repos.py", line 223, in populateSack self.doSetup() File "/usr/lib/python2.4/site-packages/yum/repos.py", line 71, in doSetup self.ayum.plugins.run('postreposetup') File "/usr/lib/python2.4/site-packages/yum/plugins.py", line 176, in run func(conduitcls(self, self.base, conf, **kwargs)) File "/usr/lib/yum-plugins/fastestmirror.py", line 176, in postreposetup_hook if downgrade_ftp and _len_non_ftp(repo.urls) == 1: File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 585, in <lambda> urls = property(fget=lambda self: self._geturls(), File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 582, in _geturls self._baseurlSetup() File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 538, in _baseurlSetup mirrorurls.extend(self._getMirrorList()) File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1349, in _getMirrorList fo = urlgrabber.grabber.urlopen(url, proxies=self.proxy_dict) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 612, in urlopen return default_grabber.urlopen(url, **kwargs) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 891, in urlopen return self._retry(opts, retryfunc, url) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 852, in _retry r = apply(func, (opts,) + args, {}) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 890, in retryfunc return URLGrabberFileObject(url, filename=None, opts=opts) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1008, in __init__ self._do_open() File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1091, in _do_open fo, hdr = self._make_request(req, opener) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1204, in _make_request fo = opener.open(req) File "/usr/lib/python2.4/urllib2.py", line 358, in open response = self._open(req, data) File "/usr/lib/python2.4/urllib2.py", line 376, in _open '_open', req) File "/usr/lib/python2.4/urllib2.py", line 337, in _call_chain result = func(*args) File "/usr/lib/python2.4/urllib2.py", line 573, in <lambda> lambda r, proxy=url, type=type, meth=self.proxy_open: \ File "/usr/lib/python2.4/urllib2.py", line 580, in proxy_open if '@' in host: TypeError: iterable argument required Please let me know what needs to be done. Thanks Jatin _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos http://www.biotronik.com * * * * * * * * BIOTRONIK SE & Co. KG Woermannkehre 1, 12359 Berlin, Germany Sitz der Gesellschaft: Berlin, Registergericht: Berlin HRA 6501 Vertreten durch ihre Komplementärin: BIOTRONIK MT SE Sitz der Gesellschaft: Berlin, Registergericht: Berlin HRB 118866 B Vorsitzender des Verwaltungsrats: Dr. Max Schaldach Geschäftsführende Direktoren: Christoph Böhmer, Dr. Werner Braun, Dr. Lothar Krings * * * * * * * * BIOTRONIK - A global manufacturer of advanced Cardiac Rhythm Management systems and Vascular Intervention devices. Quality, innovation, and reliability define BIOTRONIK and our growing success. 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1 0

Running yum shows errors
by Jatin Davey 14 Jul '10

14 Jul '10

Hi I am getting the following errors when i try to use yum to install the net-snmp paclages. [root@sc1 yum.repos.d]# yum install net-snmp Loaded plugins: fastestmirror Determining fastest mirrors Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 229, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 104, in main result, resultmsgs = base.doCommands() File "/usr/share/yum-cli/cli.py", line 339, in doCommands self._getTs(needTsRemove) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs self._getTsInfo(remove_only) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo pkgSack = self.pkgSack File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 591, in <lambda> pkgSack = property(fget=lambda self: self._getSacks(), File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 434, in _getSacks self.repos.populateSack(which=repos) File "/usr/lib/python2.4/site-packages/yum/repos.py", line 223, in populateSack self.doSetup() File "/usr/lib/python2.4/site-packages/yum/repos.py", line 71, in doSetup self.ayum.plugins.run('postreposetup') File "/usr/lib/python2.4/site-packages/yum/plugins.py", line 176, in run func(conduitcls(self, self.base, conf, **kwargs)) File "/usr/lib/yum-plugins/fastestmirror.py", line 176, in postreposetup_hook if downgrade_ftp and _len_non_ftp(repo.urls) == 1: File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 585, in <lambda> urls = property(fget=lambda self: self._geturls(), File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 582, in _geturls self._baseurlSetup() File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 538, in _baseurlSetup mirrorurls.extend(self._getMirrorList()) File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 1349, in _getMirrorList fo = urlgrabber.grabber.urlopen(url, proxies=self.proxy_dict) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 612, in urlopen return default_grabber.urlopen(url, **kwargs) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 891, in urlopen return self._retry(opts, retryfunc, url) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 852, in _retry r = apply(func, (opts,) + args, {}) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 890, in retryfunc return URLGrabberFileObject(url, filename=None, opts=opts) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1008, in __init__ self._do_open() File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1091, in _do_open fo, hdr = self._make_request(req, opener) File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1204, in _make_request fo = opener.open(req) File "/usr/lib/python2.4/urllib2.py", line 358, in open response = self._open(req, data) File "/usr/lib/python2.4/urllib2.py", line 376, in _open '_open', req) File "/usr/lib/python2.4/urllib2.py", line 337, in _call_chain result = func(*args) File "/usr/lib/python2.4/urllib2.py", line 573, in <lambda> lambda r, proxy=url, type=type, meth=self.proxy_open: \ File "/usr/lib/python2.4/urllib2.py", line 580, in proxy_open if '@' in host: TypeError: iterable argument required Please let me know what needs to be done. Thanks Jatin

1 0

[Vulgarly-Selfish-Commercial] Project: Private Super computer (HPC) in a Private cloud
by Rajagopal Swaminathan 13 Jul '10

13 Jul '10

Greetings, I am atempting to build the above captioned environment. I will contribute to this list my learnings. I need income as I need to fund this project. Threre are various revenue sharing models I have in mind. One size just cant fit all after all. (angel investors or whatever, anybody)? My offer: "Every reply for this thread will get INR 11/- from me iff only I could remit my money in a single click to the thread posters and me." Learners should pay Rs. 21/- to cober my private tution charges and establishment charges that they choose engage with. Please contact me offlist. Regards, Rajagopal

1 1

Superblock Problem
by Guy Boisvert 13 Jul '10

13 Jul '10

Hi all, After rebooting my CentOS 5.5 server, i have the following message: ================================== Red Hat nash version 5.1.19.6 starting EXT3-fs: unable to read superblock mount: error mounting /dev/root on /sysroot as ext3: invalid argument setuproot: moving /root failed: No such file or directory setuproot: error mounting /proc: No such file or directory setuproot: error mounting /sys: No such file or directory switchroot: mount failed: no such file or directory Kernel panic - not syncing: Attempted to kill init! I booted the server (rescue mode) with CentOS 5.4 x64 i have used to initially install it. It recognizes all the RAID1 partitions i have. cat /mnt/sysimage/proc/mdstat ============================ md3 : active raid1 sdb2[1] sda2[0] 2048192 blocks [2/2] [UU] md1 : active raid1 sdb3[1] sda3[0] 486134848 blocks [2/2] [UU] md0 : active raid1 sdb1[0] sda1[1] 200704 blocks [2/2] [UU] unused devices: <none> cat /mnt/sysimage/boot/grub/menu.lst =================================== # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/md1 # initrd /initrd-version.img #boot=/dev/md0 default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.18-164.10.1.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-164.10.1.el5 module /vmlinuz-2.6.18-164.10.1.el5xen ro root=/dev/md1 rhgb quiet module /initrd-2.6.18-164.10.1.el5xen.img title CentOS (2.6.18-164.10.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-164.10.1.el5 ro root=/dev/md1 rhgb quiet initrd /initrd-2.6.18-164.10.1.el5.img title CentOS (2.6.18-164.6.1.el5) root (hd0,0) kernel /vmlinuz-2.6.18-164.6.1.el5 ro root=/dev/md1 rhgb quiet initrd /initrd-2.6.18-164.6.1.el5.img title CentOS (2.6.18-164.6.1.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-164.6.1.el5 module /vmlinuz-2.6.18-164.6.1.el5xen ro root=/dev/md1 rhgb quiet module /initrd-2.6.18-164.6.1.el5xen.img title CentOS (2.6.18-164.el5xen) root (hd0,0) kernel /xen.gz-2.6.18-164.el5 module /vmlinuz-2.6.18-164.el5xen ro root=/dev/md1 rhgb quiet module /initrd-2.6.18-164.el5xen.img title CentOS-base (2.6.18-164.el5) root (hd0,0) kernel /vmlinuz-2.6.18-164.el5 ro root=/dev/md1 rhgb quiet initrd /initrd-2.6.18-164.el5.img ./getinfo.sh disk ============== == BEGIN uname -rmi == 2.6.18-164.el5 x86_64 x86_64 == END uname -rmi == == BEGIN rpm -q centos-release == centos-release-5-5.el5.centos == END rpm -q centos-release == == BEGIN getenforce == Permissive == END getenforce == == BEGIN cat /etc/fstab == /dev/md1 / ext3 defaults,acl 1 1 /dev/md0 /boot ext3 defaults 1 2 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /dev/md3 swap swap defaults 0 0 == END cat /etc/fstab == == BEGIN df -h == Filesystem Size Used Avail Use% Mounted on /dev/md1 450G 72G 355G 17% / /dev/md0 190M 45M 136M 25% /boot == END df -h == == BEGIN fdisk -l == Disk /dev/md0 doesn't contain a valid partition table Disk /dev/md1 doesn't contain a valid partition table Disk /dev/md3 doesn't contain a valid partition table Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 25 200781 fd Linux raid autodetect /dev/sda2 26 280 2048287+ fd Linux raid autodetect /dev/sda3 281 60801 486134932+ fd Linux raid autodetect Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdb1 * 1 25 200781 fd Linux raid autodetect /dev/sdb2 26 280 2048287+ fd Linux raid autodetect /dev/sdb3 281 60801 486134932+ fd Linux raid autodetect Disk /dev/md0: 205 MB, 205520896 bytes 2 heads, 4 sectors/track, 50176 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md1: 497.8 GB, 497802084352 bytes 2 heads, 4 sectors/track, 121533712 cylinders Units = cylinders of 8 * 512 = 4096 bytes Disk /dev/md3: 2097 MB, 2097348608 bytes 2 heads, 4 sectors/track, 512048 cylinders Units = cylinders of 8 * 512 = 4096 bytes == END fdisk -l == == BEGIN blkid == /dev/md3: TYPE="swap" /dev/md0: UUID="085a2fe2-a28b-4c82-aae8-d4711a73f824" TYPE="ext3" /dev/md1: UUID="4e26e66d-b4f3-45e3-8307-e13358b13610" TYPE="ext3" /dev/sdb3: UUID="4e26e66d-b4f3-45e3-8307-e13358b13610" TYPE="ext3" /dev/sdb2: TYPE="swap" /dev/sdb1: UUID="085a2fe2-a28b-4c82-aae8-d4711a73f824" TYPE="ext3" /dev/sda3: UUID="4e26e66d-b4f3-45e3-8307-e13358b13610" TYPE="ext3" /dev/sda2: TYPE="swap" /dev/sda1: UUID="085a2fe2-a28b-4c82-aae8-d4711a73f824" TYPE="ext3" == END blkid == Tried to boot from different kernels, same result. I searched Google and read something about superblock being "repeted" to many places on the filesystem but didn't tried anything because of bad explanations and fear of srewing up the partition. I already backed up the important stuff to another server. I'd like to know if it's possible to fix that problem quickly, if not i'll re-install it. But i'd like to know the fix anyway so if it appends again, would know what to do! Thanks! Guy Boisvert IngTegration inc. -- Guy Boisvert, ing. IngTegration inc. http://www.ingtegration.com AVIS DE CONFIDENTIALITÉ : ce message peut contenir des renseignements confidentiels appartenant exclusivement à IngTegration Inc. ou à ses filiales. Si vous n'êtes pas le destinataire indiqué ou prévu dans ce message (ou responsable de livrer ce message à la personne indiquée ou prévue) ou si vous pensez que ce message vous a été adressé par erreur, vous ne pouvez pas utiliser ou reproduire ce message, ni le livrer à quelqu'un d'autre. Dans ce cas, vous devez le détruire et vous êtes prié d'avertir l'expéditeur en répondant au courriel. CONFIDENTIALITY NOTICE : Proprietary/Confidential Information belonging to IngTegration Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

3 4

Setting apache's maxclients higher than 256 in CentOS
by robert mena 13 Jul '10

13 Jul '10

Hi, I could not find any reference if the version of apache compiled for centos 5.x has support for more than 256 clients in apache's maxclients. If that is not the case how can I recompile the package with such support? Regards.

3 2

is it safe to resize root, on an LVM system, online?
by Rudi Ahlers 12 Jul '10

12 Jul '10

Hi, One of our servers has a too small root partition on LVM and needs to be resized. Can / be safely increased online, without a reboot? [root@zaxen02 ~]# lvscan ACTIVE '/dev/LVM01/root' [4.00 GB] inherit ACTIVE '/dev/LVM01/home' [20.00 GB] inherit ACTIVE '/dev/LVM01/var' [4.00 GB] inherit ACTIVE '/dev/LVM01/swap' [4.00 GB] inherit ACTIVE '/dev/LVM01/log' [1.00 GB] inherit ACTIVE '/dev/LVM01/webmin' [2.00 GB] inherit ACTIVE '/dev/LVM01/xenstored' [2.00 GB] inherit ACTIVE '/dev/LVM01/xensave' [2.00 GB] inherit ACTIVE '/dev/LVM01/opennation-net_img' [10.00 GB] inherit ACTIVE '/dev/LVM01/opennation-net_swap' [1.00 GB] inherit ACTIVE '/dev/LVM01/pluto_img' [100.00 GB] inherit ACTIVE '/dev/LVM01/pluto_swap' [1.00 GB] inherit ACTIVE '/dev/LVM01/tmp' [5.00 GB] inherit [root@zaxen02 ~]# pvscan PV /dev/md1 VG LVM01 lvm2 [232.69 GB / 76.69 GB free] Total: 1 [232.69 GB] / in use: 1 [232.69 GB] / in no VG: 0 [0 ] [root@zaxen02 ~]# -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

6 9

Project Management Solutions
by Joseph L. Casale 12 Jul '10

12 Jul '10

I need to implement a solution and not having ever used anything but MS Project I would be grateful for a reco on something good. The only hope would be that its web based but I am open to anything! Thanks! jlc

8 11

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