November 2015 - Discuss - lists.centos.org

Poor perfmance of bridged interfaces
by Sergio Belkin 25 Nov '15

25 Nov '15

Hi, I've created a bridge using 2 interfaces and have a lot of messages as follows: nov 12 15:30:22 localhost kernel: br0: received packet on enp0s3 with own address as source address nov 12 15:30:22 localhost kernel: br0: received packet on enp0s3 with own address as source address And the operating systems is extremely slow Interfaces files : [root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-* DEVICE=br0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes #STP=on #DELAY=0 NM_CONTROLLED=no DEVICE=enp0s3 #HWADDR=08:00:27:AB:1D:E6 BOOTPROTO=none ONBOOT=yes NM_CONTROLLED=no BRIDGE=br0 DEVICE=enp0s8 HWADDR=08:00:27:A3:98:E6 BOOTPROTO=none ONBOOT=yes NM_CONTROLLED=no BRIDGE=br0 DEVICE=lo TYPE=loopback IPADDR=127.0.0.1 NETMASK=255.0.0.0 NETWORK=127.0.0.0 # If you're having problems with gated making 127.0.0.0/8 a martian, # you can change this to something else (255.255.255.255, for example) BROADCAST=127.255.255.255 ONBOOT=yes NAME=loopback I've disabled NetworkManager, but problem persists. System is: [root@localhost ~]# uname -a Linux localhost 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30 12:09:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux And is virtualized on VirtualBox Please could you help me to fix it? Thanks in advance! -- -- Sergio Belkin LPIC-2 Certified - http://www.lpi.org

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OT: Replacing Venerable NAS
by Tim Evans 25 Nov '15

25 Nov '15

I have an original-label Infrant (now NetGear) ReadyNAS storage appliance that's been running for 8+ years. Except for replacing its power supply, it has not skipped a beat in all this time. I use it primarily as a backup device (via NFS) for a couple of Linux machines, (via SMB) for a couple of Windows PC's, and (via ftp) for web sites at my hosting provider. SMART+ reporting shows ~75K hours operation, with zero sectors reallocated, on each of the four disks. I'm thinking I should be looking for a replacement, even with all this good info/luck. Would like to hear recommendations here. Besides the ReadyNAS, I have worked with a Thecus NAS (don't recall model). What are the features I should look at? Thanks. -- Tim Evans |5 Chestnut Court 443-394-3864 |Owings Mills, MD 21117

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Re: [CentOS] Google Ads in rsyslog documentation files
by m.roth＠5-cent.us 25 Nov '15

25 Nov '15

Peter Eckel wrote: > Hi all, > > I know this comes from upstream (and most likely from the rsyslog project itself), but what's your opinion about Google Ads in system documentation files? > >> [peckel@mucnvjmppmtr01 ~]$ cat /etc/redhat-release >> Red Hat Enterprise Linux Server release 6.7 (Santiago) >> [peckel@mucnvjmppmtr01 ~]$ grep google /usr/share/doc/rsyslog-5.8.10/* /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:google_ad_client = "pub-3204610807458280"; >> /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:google_ad_slot = "5958614527"; >> /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:google_ad_width = 125; <snip> > I find it rather disconcerting if there are commercial ads embedded in help texts I find on my open source servers. "Disconcerting" isn't the word I would use. Completely unacceptable is what I'd say. I think it's time to put in a bug report to upstream.... I need to check with my manager. I do note this is not the case in rsyslog on CentOS 7. mark

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Regional CentOS Specific Meetup groups
by Karanbir Singh 25 Nov '15

25 Nov '15

Hi, Just a quick post to say that I've setup a CentOS users group in the UK at http://www.meetup.com/CentOS-UK - aim to start organising regular demos and meetups face 2 face around the country. If you are based in the UK, I encourage you to come join the group. Also note that we have a CentOS group in India at http://www.meetup.com/CentOS-India/ and another group for the Netherlands at http://www.meetup.com/CentOS-Netherlands/ Regards and hope to see you at one of these meetups soon, -- Karanbir Singh, Project Lead, The CentOS Project +44-207-0999389 | http://www.centos.org/ | twitter.com/CentOS GnuPG Key : http://www.karan.org/publickey.asc

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How & where to add
by Siva Prasad Nath 24 Nov '15

24 Nov '15

auto eth0 iface eth0 inet static address 192.168.50.2 netmask 255.255.255.0 -- Shiva Prasad Nath 92981134

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LVM - stripped logical volumes by default?
by Rafał Radecki 24 Nov '15

24 Nov '15

Hi All. I am currently using OpenStack Juno on CentOS 7. The problem is that by default OpenStack's Cinder service creates logical volumes of "linear" type. I would like to have them stripped over all physical disks to get better write performance. Is there a way to tell LVM to create by default stripped volumes instead of linear ones? BR, Rafal.

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Re: [CentOS] Unit networkmanager.service not loaded
by Richard 24 Nov '15

24 Nov '15

> >> On Tue, Nov 24, 2015 at 11:01 PM, Richard wrote: > Date: Tuesday, November 24, 2015 22:48:30 +0800 > From: Siva Prasad Nath <shivaprasadnath21(a)gmail.com> > To: CentOS mailing list <centos(a)centos.org>, centos-devel(a)centos.org > Subject: [CentOS] Unit networkmanager.service not loaded > > systemctl stop networkmanager returns Unit > networkmanager.service not loaded > >> >> Hint -- try the: >> >> systemctl list-units | grep ... >> >> concept that you used previously and see what output you get. >> [sub-hint -- the *nix world is case sensitive.] >> >> This is a user (understanding) issue -- why are you including the >> "-devel" list? Don't. >> >> >>> Date: Tuesday, November 24, 2015 23:19:53 +0800 >>> From: Siva Prasad Nath <shivaprasadnath21(a)gmail.com> >>> >>> I can see below in development server >>> network.service >>> loaded active exited LSB: Bring up/down >>> networking NetworkManager.service >>> loaded active running Network Manager >>> >>> But not able to see in production. >>> >>> >>> Shiva Prasad Nath Well then, you need to figure out what you did differently in setting up these two environments. This is something specific to your process and procedures (or hardware/environment). There's not much that we can help you with as you haven't provided any details. Please do not top post on this list.

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Re: [CentOS] Unit networkmanager.service not loaded
by Richard 24 Nov '15

24 Nov '15

> Date: Tuesday, November 24, 2015 22:48:30 +0800 > From: Siva Prasad Nath <shivaprasadnath21(a)gmail.com> > To: CentOS mailing list <centos(a)centos.org>, centos-devel(a)centos.org > Subject: [CentOS] Unit networkmanager.service not loaded > > systemctl stop networkmanager returns Unit networkmanager.service > not loaded Hint -- try the: systemctl list-units | grep ... concept that you used previously and see what output you get. [sub-hint -- the *nix world is case sensitive.] This is a user (understanding) issue -- why are you including the "-devel" list? Don't.

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Unit networkmanager.service not loaded
by Siva Prasad Nath 24 Nov '15

24 Nov '15

systemctl stop networkmanager returns Unit networkmanager.service not loaded

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LVM - how to change lv from linear to stripped? Is it possible?
by Rafał Radecki 24 Nov '15

24 Nov '15

Hi All. Currently I am trying to change a logical volume from linear to stripped because I would like to have a better write throughput. I would like to perform this change "live" without stopping access to this lv. I have found two interesting examples: http://community.hpe.com/t5/System-Administration/Need-to-move-the-data-fro… http://www.depesz.com/2015/10/08/converting-logical-volume-so-that-its-stri… Both say basically to: - change the lv to a mirrored one by adding a stripped copy (~second device in RAID1) - change it back to a non-mirrored one by removing the primary linear lv (~first, source device in RAID1) My os is: $ cat /etc/redhat-release CentOS Linux release 7.1.1503 (Core) $ uname -r 3.10.0-229.14.1.el7.x86_64 $ rpm -qa | grep -i lvm lvm2-libs-2.02.115-3.el7_1.1.x86_64 lvm2-2.02.115-3.el7_1.1.x86_64 And the solution proposed in above examples does not work on it. After (lv xxx is only on /dev/sdb4 before): # lvconvert --mirrors 1 --stripes 4 /dev/cinder-volumes/xxx /dev/sda4 /dev/sdc4 /dev/sdd4 /dev/sdf4 I am getting in "lvdisplay -m": --- Logical volume --- LV Path /dev/cinder-volumes/xxx LV Name xxx VG Name cinder-volumes LV UUID AKjKAo-66cv-Ygc2-4Ykq-sSJQ-RJOY-mfjoMD LV Write Access read/write LV Creation host, time test.local, 2015-10-28 17:45:28 +0100 LV Status available # open 1 LV Size 64.01 GiB Current LE 16386 Mirrored volumes 2 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:22 --- Segments --- Logical extents 0 to 16385: Type raid1 Monitoring monitored Raid Data LV 0 Logical volume xxx_rimage_0 Logical extents 0 to 16385 Raid Data LV 1 Logical volume xxx_rimage_1 Logical extents 0 to 16385 Raid Metadata LV 0 xxx_rmeta_0 Raid Metadata LV 1 xxx_rmeta_1 And in "pvdisplay -m": --- Physical volume --- PV Name /dev/sda4 VG Name cinder-volumes PV Size 2.73 TiB / not usable 4.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 715255 Free PE 287476 Allocated PE 427779 PV UUID IrkkwI-AqpP-bTll-vlPq-NDSe-rDUg-ecAnkp ... Physical extent 427776 to 427776: Logical volume /dev/cinder-volumes/xxx_rmeta_1 Logical extents 0 to 0 Physical extent 427777 to 444162: Logical volume /dev/cinder-volumes/xxx_rimage_1 Logical extents 0 to 16385 --- Physical volume --- PV Name /dev/sdb4 VG Name cinder-volumes PV Size 2.73 TiB / not usable 4.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 715255 Free PE 698868 Allocated PE 16387 PV UUID hx0a1v-M68S-aPBL-1x9r-8EiD-3cu3-GQPLRo --- Physical Segments --- Physical extent 0 to 0: Logical volume /dev/cinder-volumes/xxx_rmeta_0 Logical extents 0 to 0 Physical extent 1 to 16386: Logical volume /dev/cinder-volumes/xxx_rimage_0 Logical extents 0 to 16385 Physical extent 16387 to 715254: FREE So the migration to a RAID1 logical volume is successful but the stripping (above "lvconvert --mirrors 1 --stripes 4 /dev/cinder-volumes/xxx /dev/sda4 /dev/sdc4 /dev/sdd4 /dev/sdf4") is not taken into consideration because only /dev/sda4 and /dev/sdb4 are used for xxx logical volume afterwards. Also when I run: # lvconvert -m 0 /dev/cinder-volumes/xxx /dev/sdb4 afterwards I get xxx logical volume only on /dev/sda4 and it is linear (not stripped). Can someone help me with this? ;) BR, Rafal.

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Google Ads in rsyslog documentation files
by Peter Eckel 24 Nov '15

24 Nov '15

Hi all, I know this comes from upstream (and most likely from the rsyslog project itself), but what's your opinion about Google Ads in system documentation files? > [peckel@mucnvjmppmtr01 ~]$ cat /etc/redhat-release > Red Hat Enterprise Linux Server release 6.7 (Santiago) > [peckel@mucnvjmppmtr01 ~]$ grep google /usr/share/doc/rsyslog-5.8.10/* > /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/rsyslog_secure_tls.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_ca.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_ca.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_ca.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_ca.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_ca.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_client.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_client.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_client.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_client.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_client.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_errmsgs.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_errmsgs.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_errmsgs.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_errmsgs.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_errmsgs.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_machine.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_machine.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_machine.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_machine.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_machine.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_scenario.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_scenario.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_scenario.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_scenario.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_scenario.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_server.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_server.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_server.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_server.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_server.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_summary.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_summary.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_summary.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_summary.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_summary.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> > /usr/share/doc/rsyslog-5.8.10/tls_cert_udp_relay.html:google_ad_client = "pub-3204610807458280"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_udp_relay.html:google_ad_slot = "5958614527"; > /usr/share/doc/rsyslog-5.8.10/tls_cert_udp_relay.html:google_ad_width = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_udp_relay.html:google_ad_height = 125; > /usr/share/doc/rsyslog-5.8.10/tls_cert_udp_relay.html:src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> I find it rather disconcerting if there are commercial ads embedded in help texts I find on my open source servers. Best regards, Peter.

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Unit network.service has failed
by Siva Prasad Nath 24 Nov '15

24 Nov '15

Sorry for disturbing all of you again and again. Network service cannot be started. All the commands are not working. How to start network service?net-tool already exists. -- Shiva Prasad Nath 92981134

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Kickstarting CentOS 7 VM on CentOS 6 not possible?
by Jos Vos 24 Nov '15

24 Nov '15

Hi, On CentOS 6.7 (all updates) kickstarting a CentOS 7 VM (in the way it always has worked for other versions, incl. Fedora 22 VM's), does not work for me. I use virt-install with a local copy of the "images/pxeboot" tree. It all stops with: ... [ OK ] Reached target Paths. [ OK ] Reached target Basic System. dracut-initqueue[551]: Warning: Could not boot. dracut-initqueue[551]: Warning: /dev/root does not exist Starting Dracut Emergency Shell... Warning: /dev/root does not exist ... I found zillion references to similar problems, including PXE-related (I do not use PXE, but "-l" with virt-install) and cobbler-related (no Cobbler involved), and I tried some of the suggestions, but none of them worked. Installing CentOS 7 "manually" using virt-install and the netboot ISO works fine, but I want to use kickstart files. Thanks for any suggestion. -- -- Jos Vos <jos(a)xos.nl> -- X/OS Experts in Open Systems BV | Phone: +31 20 6938364 -- Amsterdam, The Netherlands | Fax: +31 20 6948204

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Kernel route table is empty
by Siva Prasad Nath 24 Nov '15

24 Nov '15

I can add using ifconfig and route. Then I can see kernel route entry table. I reboot system. Then route table is empty. How to make kernel route entry table permanent. -- Shiva Prasad Nath 92981134

2 1

Selling DVD image which include CentOS and our application
by Takuya Yamamoto 24 Nov '15

24 Nov '15

Dear ALL Our company make and sell some measurement system controlled by Server. There is no technical issue but we don't have enough information about license. We will do the following, 1) We make the DVD image which include CentOS and our application. 2) Sell DVD to our customer. 3) Customer installs this image (CentOS and our applications) on the Server. Question 1 Is there no problem from the view point of CentOS license? Question 2 We'd like to know what we should do to CentOS community? e.g. contract, donate I read following past ML https://lists.centos.org/pipermail/centos/2010-June/096074.html But, I want to know latest your comment. br ----------------------- Yamamoto Takuya NEC Platforms, Ltd. NEC Platforms, Ltd. Confidential

2 1

Building for older versions
by Michael Eager 23 Nov '15

23 Nov '15

Hi -- I'm trying to build an application on CentOS 7 which can run on older versions of CentOS. I'm running into problems with versioning of memcpy in Glibc. Executables built on CentOS 7 require memcpy from glibc-2.14, which causes the program not to load on systems with older versions of glibc. My online search suggests to add an asm() with a .symver option to select memcpy from glibc-2.2.5 in each of the source files which reference memcpy(). This isn't practical with a program with tens of thousands of source files. Does anyone have a reasonable solution? -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

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Virtual Server in Windows 7
by Siva Prasad Nath 23 Nov '15

23 Nov '15

Hi, I am creating a virtual machine. My laptop is i686 system. Please advice me which Centos verson can be downloaded? With regards, Shiva

2 2

httpd 2.3 or 2.4 repository for CentOS 6.X anywhere?
by Jobst Schmalenbach 23 Nov '15

23 Nov '15

Hi is there a yum repository for httpd 2.3 or 2.4 for CentOS 6.X anywhere? Like remi for php/mysql? thanks Jobst -- f u cn rd ths, u cn gt a gd jb n cmptr prgmmng. [Anon] | |0| | Jobst Schmalenbach, jobst(a)barrett.com.au, General Manager | | |0| Barrett Consulting Group P/L & The Meditation Room P/L |0|0|0| +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia

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After reboot of web-server accessing website shows "Forbidden", restarting httpd all is fine
by Jobst Schmalenbach 23 Nov '15

23 Nov '15

Hi. I am stuck with this one and I do not know where and how to search for this problem nor do I know how to fix it. When I reboot one of our servers (CentOS 6.7, selinux target, yum fully updated) the http server loads fine (no erros) but when accessing one of the server's websites it displays "Forbidden", restarting the httpd server (command line) will give full access and all is fine. What troubles me that a simple restart of the daemon fixes everything but it does not come up on reboot. [Sat Nov 07 13:02:44 2015] [notice] caught SIGTERM, shutting down [Sat Nov 07 13:02:45 2015] [notice] SELinux policy enabled; httpd running as context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 [Sat Nov 07 13:02:45 2015] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Sat Nov 07 13:02:45 2015] [notice] Digest: generating secret for digest authentication ... [Sat Nov 07 13:02:45 2015] [notice] Digest: done [Sat Nov 07 13:02:45 2015] [notice] Apache/2.2.15 (Unix) PHP/5.4.45 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips mod_wsgi/3.2 Python/2.6.6 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations I started it with an strace but I cant find anything that looks suspicious ... Putting selinux into permissive mode starts the server right from boot. Looking at all the logs I cannot see anything. Any ideas? Jobst -- Though the pen IS mightier than the sword, the sword is mightier at any given moment. | |0| | Jobst Schmalenbach, jobst(a)barrett.com.au, General Manager | | |0| Barrett Consulting Group P/L & The Meditation Room P/L |0|0|0| +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia

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Urgent Help
by Siva Prasad Nath 23 Nov '15

23 Nov '15

Hi, >From yesterday my server was down. It was showing only rescue menu. I copy grub.cfg to grub.cfg.old. Replace grub.cfg from another server. Now I cannot start server. How to revert back grub.cfg and how to put vm in the boot folder? Thanks in advance. Shiva

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[Slightly OT] - Looking for shadow-utils 4.2 SIG or SCL
by Anthony K 22 Nov '15

22 Nov '15

Hi. I'm looking to run unprivileged containers on CentOS 7 and this apparently requires shadow-utils 4.2 or higher [*0*]. CentOS 7 currently has: # rpm -q shadow-utils shadow-utils-4.1.5.1-18.el7.x86_64 Is there a SIG or SCL that provides an updated package to facilitate my venture or am I left with the only choice of manually managing shadow-utils if I go the route of rpmbuild? AK. [*0*]: https://it-offshore.co.uk/linux/centos/29-centos-7-unprivileged-lxc-contain…

1 0

CPU Limit in Centos
by Edward Ned Harvey (centos) 21 Nov '15

21 Nov '15

A few years ago, I vaguely recall some issue with RHEL needing a special license or something like that, if you had more than a certain amount of CPU's or a certain amount of RAM. Does Centos work fine for 2 CPU's, 16 cores, 32 threads, and 256 G of ram? Centos6 specifically.

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Re: [CentOS] CPU Limit in Centos
by Valeri Galtsev 21 Nov '15

21 Nov '15

On Sat, November 21, 2015 8:29 am, Edward Ned Harvey (centos) wrote: > A few years ago, I vaguely recall some issue with RHEL needing a special > license or something like that, if you had more than a certain amount of > CPU's or a certain amount of RAM. > > Does Centos work fine for 2 CPU's, 16 cores, 32 threads, and 256 G of ram? > > Centos6 specifically. I have CentOS 6 box with 4 CPUs, 64 CPU cores and 512 GB of RAM... for about two years. Runs great. Valeri ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++

1 0

FYI for CentOS 6.x Users: FireFox 43+ Requires gtk3
by Tim Evans 21 Nov '15

21 Nov '15

https://www.mozilla.org/en-US/firefox/43.0beta/system-requirements/ -- Tim Evans |5 Chestnut Court 443-394-3864 |Owings Mills, MD 21117

2 1

EL7: Detecting FS errors on XFS while mounted
by Benjamin Smith 20 Nov '15

20 Nov '15

Is there a way of checking an XFS filesystem for clean/dirty status while mounted? One of the checks we've long performed is an FS-level error check. This is *not a full-on fsck*, this is "asking the file system if it noted any problems". This is done while the file system is mounted and "hot". For example, here's how we'd check an ext* partition: # debugfs -R "show_super_stats -h" /dev/md127 | grep -i "Filesystem state" We'd look for "Filesystem state: clean" (or something else if not clean). ZFS also allows for a "hot & mounted" check for dirty file system: # zpool status So far, I've been unsuccessful in finding an equivalent for XFS.

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Discuss November 2015