Discuss June 2014

discuss@lists.centos.org

122 participants
120 discussions

SSD for Centos SWAP /tmp & /var/ partition
by Keith Roberts 03 Sep '25

03 Sep '25

Has anyone actually used a SSD in a Centos setup? My little experiment with a s/h WD drive for /tmp and SWAP partitions kicked the bucket on Wednesday, when the poor WD drive caught the click-of-death. It was a s/h drive to start with and lasted about 4 months. But that was without the /var/log/ partition being written to it, as I mounted that back onto /var/log from the original drive. So I had to install another (WD) drive, and repartion it and rebuild my RPM package database, from the backed-up Packages file. That seems to be all OK now. I'm wondering if it would be a good idea to use a new SSD for moving all the disk i/o to, that Linux likes to do so often. Plus putting SWAP onto a decent SSD should speed things up somewhat. Here's a short video of a laptop fitted with a SSD drive booting macOS, compared to a similar laptop booting from the standard HDD. The laptop with the SSD boots and loads some apps in 28 seconds. The other one takes twice as long. http://eshop.macsales.com/shop/SSD/OWC/Mercury_Extreme_Pro_6G/?utm_source=t… Kind Regards, Keith Roberts ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------

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Mail Merge data to a pdf file by overlaying the data on the image
by Gregory P. Ennis 07 Jun '15

07 Jun '15

Everyone, I am looking for a utility that I can use to do a mail merge of data to a pdf image file. The image file does not have any active fields, but will be just an image file. I would like to overlay names addresses etc. We currently do this with a pcl file by just overlaying the data with pcl print positions. However, in order to get the pcl file from an original pdf file we have to use gimp to convert the pdf to pcl file, and we always lose a little resolution. I was wondering if anyone knows of a utility to perform this function without first converting the image to a pcl file. Thanks, -- Greg Ennis

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heavy IO load when working with sparse files (centos 6.4)
by Ron E 31 Mar '15

31 Mar '15

Dear List, We have noticed a variety of reproducible conditions working with sparse files on multiple servers under load with CentOS 6.4. The short story is that processes that read / write sparse files with large "holes" can generate an IO storm. Oddly, this only happens with holes and not with the sections of the files that contain data. We have seen extremely high IO load for example copying a 40 or 80gb sparse file that only has a few gigs of data in it. Attempts to lower the io priority and cpu priority of these processes do not make any measurable difference. (ionice, nice) This has been observed with processes such as: cp rsync sha1sum The server does have to be under some load to reproduce the necessary conditions. The cases we have seen involve servers running 10-30 guests under kvm. Load is in acceptable norms when the processes are run, such as load avg 5-15 on a 24 core (12 core with HT enabled) server. We also verify before starting such a process that the spindle with the file we're working on is not being unduly hammered by another process. These servers have one hardware raid controller each (Dell H700 controller with write cache enabled) and multiple raid arrays (separate sets of physical spindles). Interestingly, the IO storm is not limited to the array / spindles where the sparse file resides but affects all IO on that server. We have looked extensively and not found any account of a similar issue. We have seen this on configurations that are 'plain vanilla' enough to think that this is not something specific to our environment. Wondering if anyone else has seen this and if any suggestions on gathering more data / troubleshooting. We wonder if we've found either a raid controller driver issue, an OS issue or some other such thing. What seems to point in this direction is that even with ionice -c3 which should prevent the process from using IO unless the storage is idle, an io storm which appears to saturate the entire raid bus on a given server can occur. Thanks in advance.

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Centos 6.4 on Xserve, IPMI error
by Arno B 31 Mar '15

31 Mar '15

Hello! I'm trying to install Centos 6.4 64 bit on this Xserve: http://www.everymac.com/systems/apple/xserve/specs/xserve-intel-xeon-2.8-ei… I got a bootloader from: http://blog.christophersmart.com/2009/07/23/linux-on-an-apple-xserve-efi-on… as none of the official Centos releases (full, minimal, network 64 bit) boot on this machine. They all crash when loading the bootx64.conf. I have built a USB stick with a working bootx64.efi, grub.cfg, together with an initrd and a vmlinuz from the isolinux folder. These seem to get me into booting a kernel until something called IPMI is starting to throw errors at me: Console: switching to colour frame buffer device 128x48 fb0: VESA VGA frame buffer device ipmi message handler version 39.2 IPMI System Interface driver. ipmi_si 0000:09:00.4: enable device (0002 -> 0003) ipmi_si 0000:09:00.4: PCI INT C -> GSI 16 (level, low) -> IRQ 16 ipmi_si: Adding PCI-specified kcs state machine ipmi_si 0000:09:00.7: enable device (0000 -> 0003) ipmi_si 0000:09:00.7: PCI INT D -> GSI 17 (level, low) -> IRQ 17 ipmi_si: Adding PCI-specified bt state machine ipmi_si: Trying PCI-specified kcs state machine at mem address 0x90841000, slave address 0x0 irq 16 IRQ 16/ipmi_si: IRQF_DISABLED is not guaranteed on shared IRQs Using irq 16 ipmi: Found new BMC (man_id: 0x00003f, prod_id: 0x0003, dev_id: 0x20) IPMI kcs interface initialized ipmi_si: Trying PCI-specified kcs state machine at mem address 0x90840000, slave address 0x0 irq 17 Refined TSC clocksource calibration: 2792.999 MHz. Switching to clocksource tsc IPMI BT: timeout in XACTION [ B_BUSY ] 1 retries left IPMI BT: timeout in XACTION [ B_BUSY ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) IPMI BT: timeout in XACTION [ B_BUSY H2B ] failed 2 retries, sending error response IPMI: BT reset (takes 5 secs) then the screen goes to black and the machine doesn't respond to anything anymore... Can anyone please help me with this? Maybe just point me in a direction where to find a solution? I've been googling for a few days now without much results... thanks in advance Arno Beekman

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chromium-33.0.1750.152-3.el6
by ngeorgop 24 Sep '14

24 Sep '14

*New version of chromium (33.0.1750.152)*Build by me :-)i686 chromium-33.0.1750.152-3.el6.i686.rpm <https://docs.google.com/file/d/0B9RlkKQB1POSWmFiT0REeG1QS28/> SRPM chromium-33.0.1750.152-3.el6.src.rpm <https://docs.google.com/file/d/0B9RlkKQB1POSQlZ1OUljT3p6U1U/> -- View this message in context: http://centos.1050465.n5.nabble.com/CentOS-chromium-33-0-1750-152-3-el6-tp5… Sent from the CentOS mailing list archive at Nabble.com.

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mixing MX and CNAME
by aurfalien 27 Aug '14

27 Aug '14

Hi, Has any one had problems with mail clients were your DNS is like this; doman.com MX 50 mail.domain.com domain.com MX 100 mail2.domain.com domain.com CNAME www.domain.com -aurf

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RH developer toolset
by Jerry Geis 13 Aug '14

13 Aug '14

I saw an article this morning about the RH developer toolset. basically it includes a couple of packages like PHP python mysql (etc) that are later packages than that included in the released version like a 6.4 for example. So instead of php 5.3 with patches it would be php 5.4 and so on. That is great for a couple packages - but what about more up to date libraries like glib. 6.4 is way behind on glib. Like a couple years behind. Are there any plans in the "toolset" to update core libraries also? Thanks, Jerry

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How to enable EDAC kernel module for checking ECC memory?
by Lists 02 Jul '14

02 Jul '14

In order to support ZFS, we upgraded a backups server with a new, ECC motherboard. We're running CentOS 6 with ZFS on Linux, recently patched. Now, I want to enable EDAC so we can check for memory errors (and maybe PCI errors as well) but so far, repeatedly pounding on the Google hasn't yielded exactly what I need to do to enable EDAC. One howto was covering PCI and edac, but "modprobe edac_mc" didn't work. Here's some information below, How do I get edac up and running? Many howtos cover how to use edac-ctl and edac-util, but none seem to cover how to determine what module to load into the kernel. [root@hume ~]# modprobe edac_mc FATAL: Module edac_mc not found. [root@hume ~]# lsmod | grep edac [root@hume ~]# cat /proc/version Linux version 2.6.32-431.11.2.el6.x86_64 (mockbuild(a)c6b8.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC) ) #1 SMP Tue Mar 25 19:59:55 UTC 2014 [root@hume ~]# modprobe edac_mce FATAL: Module edac_mce not found. [root@hume ~]# edac-ctl --mainboard edac-ctl: mainboard: Supermicro X9SCL/X9SCM [root@hume ~]# edac-ctl --status edac-ctl: drivers not loaded. [root@hume ~]# lsmod Module Size Used by ext3 240013 1 jbd 80858 1 ext3 nfsd 309196 13 lockd 73662 1 nfsd nfs_acl 2647 1 nfsd auth_rpcgss 44949 1 nfsd sunrpc 262864 20 nfsd,lockd,nfs_acl,auth_rpcgss exportfs 4236 1 nfsd bnx2fc 90539 0 fcoe 23298 0 libfcoe 56791 2 bnx2fc,fcoe 8021q 25349 0 garp 7152 1 8021q stp 2218 1 garp libfc 108670 3 bnx2fc,fcoe,libfcoe llc 5546 2 garp,stp scsi_transport_fc 55299 3 bnx2fc,fcoe,libfc scsi_tgt 12077 1 scsi_transport_fc ipt_REJECT 2351 2 nf_conntrack_ipv4 9506 15 nf_defrag_ipv4 1483 1 nf_conntrack_ipv4 iptable_filter 2793 1 ip_tables 17831 1 iptable_filter ip6t_REJECT 4628 2 nf_conntrack_ipv6 8337 2 nf_defrag_ipv6 11156 1 nf_conntrack_ipv6 xt_state 1492 17 nf_conntrack 79758 3 nf_conntrack_ipv4,nf_conntrack_ipv6,xt_state ip6table_filter 2889 1 ip6_tables 18732 1 ip6table_filter iTCO_wdt 7115 0 iTCO_vendor_support 3056 1 iTCO_wdt zfs 1152935 53 zcommon 44698 1 zfs znvpair 80460 2 zfs,zcommon zavl 6925 1 zfs zunicode 323159 1 zfs spl 260832 5 zfs,zcommon,znvpair,zavl,zunicode zlib_deflate 21629 1 spl i2c_i801 11359 0 i2c_core 31084 1 i2c_i801 ses 6475 0 enclosure 8438 1 ses sg 29350 0 lpc_ich 12803 0 mfd_core 1895 1 lpc_ich shpchp 32778 0 ext4 374902 3 jbd2 93427 1 ext4 mbcache 8193 2 ext3,ext4 raid1 32045 2 usb_storage 49068 5 sd_mod 39069 27 crc_t10dif 1541 1 sd_mod ata_generic 3837 0 pata_acpi 3701 0 pata_jmicron 2813 2 video 20674 0 output 2409 1 video e1000e 267701 0 ptp 9614 1 e1000e pps_core 11458 1 ptp ahci 42247 8 xhci_hcd 148886 0 dm_mirror 14384 0 dm_region_hash 12085 1 dm_mirror dm_log 9930 2 dm_mirror,dm_region_hash dm_mod 84209 2 dm_mirror,dm_log be2iscsi 99578 0 bnx2i 48096 0 cnic 57079 2 bnx2fc,bnx2i uio 10462 1 cnic ipv6 317829 56 ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6,cnic cxgb4i 28361 0 cxgb4 104882 1 cxgb4i cxgb3i 24491 0 libcxgbi 52202 2 cxgb4i,cxgb3i cxgb3 152922 1 cxgb3i mdio 4769 1 cxgb3 libiscsi_tcp 17020 3 cxgb4i,cxgb3i,libcxgbi qla4xxx 257114 0 iscsi_boot_sysfs 9458 2 be2iscsi,qla4xxx libiscsi 49836 7 be2iscsi,bnx2i,cxgb4i,cxgb3i,libcxgbi,libiscsi_tcp,qla4xxx scsi_transport_iscsi 84241 5 be2iscsi,bnx2i,libcxgbi,qla4xxx,libiscsi [root@hume ~]# rpm -qi edac-utils Name : edac-utils Relocations: (not relocatable) Version : 0.9 Vendor: CentOS Release : 14.el6 Build Date: Wed 20 Jul 2011 11:13:34 AM UTC Install Date: Wed 25 Jun 2014 09:27:40 PM UTC Build Host: c6b6.bsys.dev.centos.org Group : System Environment/Base Source RPM: edac-utils-0.9-14.el6.src.rpm Size : 78637 License: GPLv2+ Signature : RSA/SHA1, Mon 26 Sep 2011 04:17:58 AM UTC, Key ID 0946fca2c105b9de Packager : CentOS BuildSystem <http://bugs.centos.org> URL : http://sourceforge.net/projects/edac-utils/ Summary : Userspace helper for kernel EDAC drivers Description : EDAC is the current set of drivers in the Linux kernel that handle detection of ECC errors from memory controllers for most chipsets on i386 and x86_64 architectures. This userspace component consists of an init script which makes sure EDAC drivers and DIMM labels are loaded at system startup, as well as a library and utility for reporting current error counts from the EDAC sysfs files.

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Google Hangout Plugin Does Not Work For Other Users
by Mark LaPierre 01 Jul '14

01 Jul '14

Hey All, I've got the Google Talk plugin installed at: File: libnpgoogletalk.so Path: /opt/google/talkplugin/libnpgoogletalk.so Version: State: Enabled Version: 5.4.2.0 And the Google Talk Plugin Video Renderer at: File: libnpo1d.so Path: /opt/google/talkplugin/libnpo1d.so Version: State: Enabled Version: 5.4.2.0 When I start of join a Google Hangout all works as expected for me. When another user on my system tries to start/join a Hangout she gets an error telling her that the plugin is not installed. When I check "about:plugins" under her login it says that the plugin is installed in the same location/version. I checked the file access settings and found all is set as expected, 755, on the plugin and it's directories all the was down to root. -rwxr-xr-x. 1 root root 273496 Jun 7 17:38 libnpgoogletalk.so -rwxr-xr-x. 1 root root 229784 Jun 7 17:38 libnpo1d.so Shouldn't this work system wide? If I try to install the plugin as firefox seems to think I should I'm told that I already have the pluging installed, which is true. Does anyone have a clue why it's refusing to start? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

3 3

GUI Question
by Deno Sayangda Dangpaliw 01 Jul '14

01 Jul '14

Hi, There's something weird happening to my CentOS VMs, cannot switch back to GUI. Black screen with a single underscore character at top left of the screen. Ok so I have ESXI 5.1 host, with 3 VM all running CentOS. I rebooted the esxi host yesterday for a power maintenance. All went well... until I switched console on the vms. I was able to login using the GUI, then I pressed Alt F5, then I was sent to the text console... I usually do this to save energy. I did the same for all the Centos vm... now I wanted to switch back to GUI but I can't. I even pressed all the keys from F1 to F12 but were not able to get back to the GUI for all the VMs. Can you please advise where Im missing? Regards, Deno

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Discuss June 2014