Discuss November 2005

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232 participants
368 discussions

Best mkfs.ext2 performance options on RAID5 in CentOS 4.2
by Sean Staats 02 Nov '05

02 Nov '05

I can't seem to get the read and write performance better than approximately 40MB/s on an ext2 file system. IMO, this is horrible performance for a 6-drive, hardware RAID 5 array. Please have a look at what I'm doing and let me know if anybody has any suggestions on how to improve the performance... System specs: ----------------- 2 x 2.8GHz Xeons 6GB RAM 1 3ware 9500S-12 2 x 6-drive, RAID 5 arrays with a stripe size of 256KB. Each array is 2.3TB after formatting. ioscheduler set to use the deadline scheduler. mkfs.ext2 options used: ------------------------ mkfs.ext2 -b 4096 -L /d01 -m 1 -O sparse_super,dir_index -R stride=64 -T largefile /dev/sda1 I'm using a stride size of 64 since the ext2 block size is 4KB and the array stripe size is 256KB (256/4 = 64). Output of using bonnie++: --------------------------- $ /usr/local/bonnie++/sbin/bonnie++ -d /d01/test -r 6144 -m anchor_ext2_4k_64s Version 1.03 ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP anchor_ext2_4k_ 12G 41654 96 41937 11 30537 8 40676 88 233015 27 426.6 1 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 3369 83 +++++ +++ +++++ +++ 4142 100 +++++ +++ 11728 100 Cheers! Sean

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Has anyone successfully used centos 4 as an iscsi TARGET
by Scott Heisler 02 Nov '05

02 Nov '05

I'd love to create an ISCSI Target with Centos 4 but have not seen any good docs on how to accomplish this. Anyone know of any good docs on how to make Centos 4.1 a good ISCSI Target? Thanks Scott

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Re: [CentOS] VPN via PPTP and MPPE
by James B. Byrne 02 Nov '05

02 Nov '05

On 1 Nov 2005 at 11:25, Joe Pruett wrote: > on the windows box deep in the network properties for the vpn you'll > find the 'use default gateway on this interface' or something very much > like that. uncheck that and then regular internet traffic will not go > over the vpn. Thank you. I found a fairly well written faq on what can go wrong with vpn, which of course I cannot find at the moment. The basic problem with my setup as originally given is that VPNs cannot connect over IPs belonging to the same netblock as the physical NICs. So the client end has to have an IP address assigned by the pptpd that is on a different netblock from that assigned to its NIC. I changed the client side IP address asignment and I can now get a VPN link to the PPTPD host, but I cannot get a route off that box. Once I get past that problem then I will post a summary of whaI did. This is evidently a routing issue, as you have pointed out, but one that is probably a by product of some configuration error I have made to the pptpd options. Regards, Jim -- *** e-mail is NOT a secure channel *** James B. Byrne mailto:ByrneJB.<token>@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3CE delivery <token> = hal

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Re: [CentOS] Dag repo
by Brian T. Brunner 02 Nov '05

02 Nov '05

[QUOTE] Use the "Dag RPM Repository for Red Hat Enterprise Linux" entry, and beautiful women will flock to your doorstep. [/QUOTE] Each one demanding several years back child support. Brian Brunner brian.t.brunner(a)gai-tronics.com (610)796-5838 ******************************************************************* This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. www.hubbell.com - Hubbell Incorporated

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clamav
by JC 02 Nov '05

02 Nov '05

Hi all, I tried: /usr/bin/freshclam -l /var/log/clamav/clam-update.log and I got some warnings telling me that my ClamAV installation is OUTDATED - please update immediately!... then I tried: yum update clamav, but no clamav package was found. Does anybody know how to update clamav using yum or any other updater??? Thanks, JC --

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grub booting from software raid problem
by Jake Grimmett 02 Nov '05

02 Nov '05

Dear All, I'm trying to install Centos 4.2 x86_64 on a new Opteron server, using a software raid 1 boot partition. Here is the appropriate section of my kickstart.cfg #System bootloader configuration bootloader --location=mbr #Clear the Master Boot Record zerombr yes #Partition clearing information clearpart --all --initlabel #Disk partitioning information part raid.01 --size 50000 --asprimary --ondisk sda part raid.02 --size 50000 --asprimary --ondisk sdb raid / --level=1 --device=md0 --fstype ext3 raid.01 raid.02 ###################################### Unfortunately, when the server completes the install and reboots I am stuck at a GRUB prompt. Typing the following at the grub prompt allows me to boot: root (hd1,0) kernel /boot/vmlinuz-2.6.9-22.ELsmp ro root=/dev/md0 initrd /boot/initrd-2.6.9-22.ELsmp.img boot But, once booted grub-install fails: grub-install --root-directory=/boot /dev/sda /dev/md0 does not have any corresponding BIOS drive If I don't use software raid for the root partition, all works fine, but this erodes the redundancy of my server... Have I suddenly started doing something wrong, or is there a new bug out there that needs whacking ? I'd be grateful for your comments! Jake -- Dr J. Grimmett Computer Systems Manager Division of Molecular Structure National Institute for Medical Research The Ridgeway Mill Hill London, NW7 1AA Tel: 0208 816 2028 Fax: 0208 906 4477

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Re: www.centos.org - Contact Us Form
by Kai Schaetzl 02 Nov '05

02 Nov '05

Karanbir Singh wrote on Wed, 02 Nov 2005 00:54:32 +0000: > What is up with all these test messages ? donavan and me were troubleshooting the contact forms, see #centos-dev. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com IE-Center: http://ie5.de & http://msie.winware.org

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samba log on problems
by Kai Sandsengen 02 Nov '05

02 Nov '05

I can not log on to my samba server from centos client, this used to be ok when running 4.1. I don't now if I have messed up or what. The server is up and running, no problems with log on from windows client. On client, Iptables is ok, server is running, lisa is running. Tried to use the system-config-samba on client just to check, then this messages: Any ideas of what might be the problem? # system-config-samba Traceback (most recent call last): File "/usr/share/system-config-samba/system-config-samba.py", line 41, in ? mainWindow.MainWindow(debug_flag) File "/usr/share/system-config-samba/mainWindow.py", line 75, in __init__ self.samba_data = sambaParser.SambaParser(self) File "/usr/share/system-config-samba/sambaParser.py", line 41, in __init__ self.parseFile() File "/usr/share/system-config-samba/sambaParser.py", line 75, in parseFile token = self.createToken(line) File "/usr/share/system-config-samba/sambaParser.py", line 147, in createToken token = sambaToken.SambaToken(sambaToken.SambaToken.SAMBA_TOKEN_KEYVAL, (name, value), self.parent) File "/usr/share/system-config-samba/sambaToken.py", line 36, in __init__ raise AttributeError, value AttributeError: ('valid user', 'adam')

1 0

SCSI messages
by Tom Brown 02 Nov '05

02 Nov '05

Hi Fresh 4.2 install on a box that has the following RAID card GDT-HA: Storage RAID Controller Driver. Version: 3.04 ACPI: PCI interrupt 0000:03:09.0[A] -> GSI 27 (level, low) -> IRQ 225 GDT-HA: Found 1 PCI Storage RAID Controllers Configuring GDT-PCI HA at 3/9 IRQ 225 GDT-HA 0: Name: SRCU31L scsi2 : SRCU31L Vendor: Intel Model: Host Drive #00 Rev: Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 214837245 512-byte hdwr sectors (109997 MB) I noticed these messages this morning and wonder if its anything to be alarmed about? Everything seems 'fine' thanks Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block Adapter 0: SCSI-A, ID 2, LUN 0: Reassigning Block

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iFolder
by edukes＠alltel.net 02 Nov '05

02 Nov '05

Hello, Anyone have this running on a CentOS system? I've installed everthing but can't seem to setup an account with the client? How do you add accounts? TIA

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Discuss November 2005