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Bonding performance question
by lhecking＠users.sourceforge.net 12 Jan '11

12 Jan '11

I have a Dell server with four bonded, gigabit interfaces. Bonding mode is 802.3ad, xmit_hash_policy=layer3+4. When testing this setup with iperf, I never get more than a total of about 3Gbps throughput. Is there anything to tweak to get better throughput? Or am I running into other limits (e.g. was reading about tcp retransmit limits for mode 0). The iperf test was run with iperf -s on the server, and iperf -c server on four clients connected to the same switch. ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 10.10.15.193 port 5001 connected with 10.10.15.184 port 48588 [ 5] local 10.10.15.193 port 5001 connected with 10.10.15.187 port 49231 [ 6] local 10.10.15.193 port 5001 connected with 10.10.15.188 port 53197 [ 7] local 10.10.15.193 port 5001 connected with 10.10.15.189 port 55309 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 1.10 GBytes 941 Mbits/sec [ 5] 0.0-10.0 sec 872 MBytes 728 Mbits/sec [ 6] 0.0-10.0 sec 318 MBytes 267 Mbits/sec [ 7] 0.0-10.0 sec 1.10 GBytes 939 Mbits/sec [ 8] local 10.10.15.193 port 5001 connected with 10.10.15.184 port 48589 [ 4] local 10.10.15.193 port 5001 connected with 10.10.15.187 port 49234 [ 5] local 10.10.15.193 port 5001 connected with 10.10.15.188 port 38864 [ 6] local 10.10.15.193 port 5001 connected with 10.10.15.189 port 55311 [ 8] 0.0-10.0 sec 1.10 GBytes 941 Mbits/sec [ 4] 0.0-10.0 sec 862 MBytes 721 Mbits/sec [ 5] 0.0-10.0 sec 322 MBytes 270 Mbits/sec [ 6] 0.0-10.0 sec 1.10 GBytes 939 Mbits/sec --------------------------------------------------------------- This message and any attachments may contain Cypress (or its subsidiaries) confidential information. If it has been received in error, please advise the sender and immediately delete this message. ---------------------------------------------------------------

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parted usage
by aurfalien＠gmail.com 12 Jan '11

12 Jan '11

Hello again, Been an interesting day. I'm attempting to use parted to create a partition on a 28TB volume which consists of 16x2TB drives configuired in a Raid 5 + spare, so total unformatted size is 28TB to the OS.. However upon entering parted, and making a gpt label, print reports back as follows; Model: Areca ARC-1680-VOL#000 (scsi) Disk /dev/sdc: 2199GB Sector Size (logical/physical): 512B/512B Partition Table: gpt Why is the disk reporting ~2TB? Should I be using another partitioning tool for such a large volume? - aurf

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CentOS, mahmoud mansy has invited you to open a Gmail account
by mahmoud mansy 11 Jan '11

11 Jan '11

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drivers
by mahmoud mansy 11 Jan '11

11 Jan '11

hey guys, wanna know where to find my graphics card driver for centos5.5 coz the 5.4 support it and xserver start automaticly but the 5.5 doesnot start and tried to reconfigure the xorg.conf but it doesnot work too. and i noticed that the hardware prob process find a different driver for my card . mine is arrandle.intel! my system is a dell studio laptop 1569! thnx in advance

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usb 3
by Jerry Geis 11 Jan '11

11 Jan '11

I am trying to plug a USB 2 device in a USB 3 slot. Nothing is being detected in "lsusb". Is there something special I need to do? I am running centos 5.5 x86_64. I thought 3.0 was backward compatible. Nothing special about my device its an RS232 to USB device. It works in 2.0 slot. Thanks, Jerry

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Re: [CentOS] logical volume management:problem solved
by Ritika Garg 11 Jan '11

11 Jan '11

I updated the package system-config-lvm, so now i can see system->administration->logical volume management

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rpm/yum/repo issue - Error: Package tuple could not be found in packagesack
by nux＠li.nux.ro 11 Jan '11

11 Jan '11

Hi guys, I've been working on a yum repo for PHP 5.2 and today I wanted to update it[1], however on a test machine using my PHP packages (e.g. php-common-5.2.16-1nux) a yum update to the new RPMs with version 5.2.17 gives the following error: "Error: Package tuple ('php-common', 'i386', '0', '5.2.17', '1nux') could not be found in packagesack". Any rpm guru around has an idea of what is causing this? The php-common package is clearly mentioned in the spec file: "%package common Group: Development/Languages Summary: Common files for PHP Provides: php-api = %{apiver}, php-zend-abi = %{zendver} Provides: php(api) = %{apiver}, php(zend-abi) = %{zendver} # Provides for all builtin modules: Provides: php-bz2, php-calendar, php-ctype, php-curl, php-date, php-exif Provides: php-ftp, php-gettext, php-gmp, php-hash, php-iconv, php-libxml Provides: php-reflection, php-session, php-shmop, php-simplexml, php-sockets Provides: php-spl, php-tokenizer, php-openssl, php-pcre Provides: php-zlib, php-json, php-zip, php-dbase Obsoletes: php-openssl, php-pecl-zip, php-json, php-dbase %description common The php-common package contains files used by both the php package and the php-cli package." [1] - http://www.php.net/archive/2011.php#id2011-01-06-1

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Re: [CentOS] how to recreate eth0 - Realtek 8169sc [SOLVED]
by Rudi Ahlers 11 Jan '11

11 Jan '11

On Mon, Jan 10, 2011 at 12:08 PM, Rudi Ahlers <Rudi(a)softdux.com> wrote: > On Mon, Jan 10, 2011 at 11:49 AM, compdoc <compdoc(a)hotrodpc.com> wrote: >> I love realtek - the resources they use tend not to conflict with other >> cards or hardware, they don't use much cpu time, the drivers are mature, and >> they don't cost much. What could be better? There does seem to be at least >> one onboard realtek chipset that can have driver issues, but I use the 8169 >> without problems. >> >> But hardware does fail. And any brand of nic can fail in odd ways. I'm >> guessing you've swapped it out? > > Yes, the NIC might have failed, but how do I tell? lspci still shows > it as active. > > >> >> Bios settings can change if the on-board battery is dead and the system >> loses power. (It can set to defaults) But bios settings rarely affect nics - >> you're more likely to see boot problems from a change in drive boot >> sequence. > > I already checked, BIOS settings didn't change :) > >> >> I don't suppose you have a vpn on your lan? I noticed you use the >> 192.168.1.x address range, which is one of the most common ranges in the >> world. If someone connects to your vpn from home or workplace, and if they >> use the same range, and if theres a bridge, addresses are going to >> conflict. > > This is purely cause the ADSL router in the office is on the > 192.168.1.0 subnet, so it's less hassle when it needs to be swapped > out to get it back up again. No VPN. > > >> >> If you delete your ifcfg-eth0 or ifcfg-eth1 files, centos will recreate them >> if it sees the nics at boot. But it tends to enable eth0 and disable eth1 or >> higher. You should have backups of your originals for that reason... > > I've already tried that, but eth0 doesn't automatically get detected. > > >> >> I bet you wish you had a tcp/ip based kvm switch system about now... >> > > Yes, I supposed I could take one from a client server, or open a > sealed one, but it's not really necessary. For now I put in another > D-Link and got the server up that way, but would prefer to use the > onboard one since I had to take everything out of the 1U chassis, > which doesn't support more than 1 additional NIC. > >> >> _______________________________________________ >> > > This is really weird, after I installed the 2nd D-Link card and booted up the server everyone could work again. But I noticed and eth2 being loaded as well, which could only make sense if the onboard NIC was in fact still working. And it was. So I took out the D-Link, deleted eth2, rebooted and it worked again as normal. Why would this happen, or have happened in the first place? Why would a NIC just loose it's drivers like that? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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latest kernel - version question
by Rob Kampen 10 Jan '11

10 Jan '11

Hi List, just doing my weekly yum update and noticed that the kernel is designated .i686 but the headers package is .i386?? surely the headers should match the kernel geometry that it was compiled for? confused. TIA Rob

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Re: [CentOS] usb 3
by Lisandro Grullon 10 Jan '11

10 Jan '11

It would be great if you can post the output of this command to see the device ID /sbin/lspci - n | grep '01:00.0' >>> Jerry Geis <geisj(a)MessageNetSystems.com> 1/10/2011 3:12 PM >>> sure - I can wait for 6. Was hoping it would be here by now. Jerry Lisandro Grullon wrote: Likely support for 3.0 hasn't reach that kernel, probably in the present unstable build it is being tested, not sure if you want to take that risk though. If I were you I would wait until they work out the bugs, likely this will get integrated in 6.x which should be out not too far ahead. Can you live with 2.0 for now. I rather play safe than dealing with module crashes, it will be your call. >>> Jerry Geis <geisj(a)MessageNetSystems.com> ( mailto:geisj@MessageNetSystems.com ) 1/10/2011 3:01 PM >>> running 2.6.18-194.26 - not the latest but close. jerry Lisandro Grullon wrote: Sounds like a driver issue then....have you update your kernel recently? >>> Jerry Geis <geisj(a)MessageNetSystems.com> ( mailto:geisj@MessageNetSystems.com ) 1/10/2011 2:56 PM >>> I am not getting any events when I plug/unplug from the usb 3 port. Works fine in a 2.0 port. jerry Lisandro Grullon wrote: Jerry, See the /var/log/messages and see if you see the device being detect by the kernel when you plug in. tail /var/log/messages should hint you something.. >>> Jerry Geis <geisj(a)pagestation.com> ( mailto:geisj@pagestation.com ) 1/10/2011 2:36 PM >>> > > It is backwards compatible, but the chipset might not yet be > supported. What does lsdev show for the port? > I dont have lsdev - I do have lspci. Is this what you meant? 00:00.0 Host bridge: Intel Corporation N10 Family DMI Bridge (rev 02) 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02) 00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 02) 00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 02) 00:1c.2 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 3 (rev 02) 00:1d.0 USB Controller: Intel Corporation N10/ICH7 Family USB UHCI Controller #1 (rev 02) 00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 02) 00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 02) 00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 02) 00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation NM10 Family LPC Controller (rev 02) 00:1f.2 IDE interface: Intel Corporation N10/ICH7 Family SATA IDE Controller (rev 02) 00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 02) 01:00.0 USB Controller: NEC Corporation Unknown device 0194 (rev 03) 02:00.0 Network controller: RaLink RT2860 03:00.0 VGA compatible controller: nVidia Corporation GT218 [ION] (rev a2) 03:00.1 Audio device: nVidia Corporation High Definition Audio Controller (rev a1) 04:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet (rev 10) Jerry _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos -- Jerry Geis MessageNet Systems 101 East Carmel Dr. Suite 105 Carmel, IN 46032 (317)566-1677 (317)663-0808 Fax -- Jerry Geis MessageNet Systems 101 East Carmel Dr. Suite 105 Carmel, IN 46032 (317)566-1677 (317)663-0808 Fax -- Jerry Geis MessageNet Systems 101 East Carmel Dr. Suite 105 Carmel, IN 46032 (317)566-1677 (317)663-0808 Fax

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