Re: [CentOS] XFS on a 25 TB device
On Wed, Sep 29, 2010 at 11:53 AM, James A. Peltier jpelt...@sfu.ca wrote: - Original Message - | On Wednesday 29 September 2010, Boris Epstein wrote: | Hello all, | | I have just configured a 64-bit CentOS 5.5 machine to support an XFS | filesystem as specified in the subject line. The filesystem will be | used to | store an extremely large number of files (in the tens of millions). | Due to | its extremely large size, would there be any non-standard XFS | build/configuration options I should consider? | | I have created and tested filesystems larger than 25T using xfs on | CentOS-5 | (64-bit). I did not use any non-standard options. Do not attempt this | on a | 32-bit box. | | However, given the size of the device I assume that this is a raid of | some | sort. You'll want to make sure to run mkfs.xfs with the proper stripe | parameters to get the alignment right. Also, you may want to make sure | your | LVM or partition table is properly aligned. | | Even with the above done right you may get worse performance than | expected | since lots of small files typically reads like terrible | performance. | | Finally I'd suggest you fill the filesystem and read it back | (verifying what | you wrote). This is, imho, a reasonable level of paranoia. | | /Peter | | Thanks. | | Boris. | | ___ | CentOS mailing list | CentOS@centos.org | http://lists.centos.org/mailman/listinfo/centos On my 30+TB file systems all I've done is mkfs.xfs with stripe and width parameters and they are very speedy. I've not done anything on the LVM side and see no performance issues, but perhaps I need to investigate that some more. :\ -- James A. Peltier Systems Analyst (FASNet), VIVARIUM Technical Director Simon Fraser University - Burnaby Campus Phone : 778-782-6573 Fax : 778-782-3045 E-Mail : jpelt...@sfu.ca Website : http://www.fas.sfu.ca | http://vivarium.cs.sfu.ca MSN : subatomic_s...@hotmail.com Does your OS has a man 8 lart? http://www.xinu.nl/unix/humour/asr-manpages/lart.html ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks James! I am wondering if I need to worry about stripe and width though as mine resides on a logical volume residing on a hardware-controlled RAID 6 device (i.e., one slice as far as the OS is concerned). Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] XFS on a 25 TB device
On Wed, Sep 29, 2010 at 12:12 PM, Joseph L. Casale jcas...@activenetwerx.com wrote: I am wondering if I need to worry about stripe and width though as mine resides on a logical volume residing on a hardware-controlled RAID 6 device (i.e., one slice as far as the OS is concerned). 25 TB on a single volume, not distributed? Huh, let me know how long that takes to check the first time something sh!ts the bed and instead of some amount of a distributed portion of the data drops out of users reach, it *all* does:) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos it is a single logical volume, spread over 16 physical disks controlled by a hrdware RAID controller. Dunno - we have a similar setup in two other machines (smaller disks, same idea), been going strong for over 3 years now. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] XFS on a 25 TB device
On Wed, Sep 29, 2010 at 12:58 PM, Peter Kjellstrom c...@nsc.liu.se wrote: On Wednesday 29 September 2010, Boris Epstein wrote: On Wed, Sep 29, 2010 at 11:53 AM, James A. Peltier jpelt...@sfu.ca wrote: | However, given the size of the device I assume that this is a raid of | some | sort. You'll want to make sure to run mkfs.xfs with the proper stripe | parameters to get the alignment right. Also, you may want to make sure | your | LVM or partition table is properly aligned. ... I am wondering if I need to worry about stripe and width though as mine resides on a logical volume residing on a hardware-controlled RAID 6 device (i.e., one slice as far as the OS is concerned). That is why you need to consider it. If the device is aligned on stripe size (chunk size * (number of drives - 2 for raid6 parity)) and the filesystem is made aware it can put stuff (files, metadata, etc.) so that a minimum of stripes are touched (less I/O done). /Peter Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Well, you are interfering with the hardware RAID controller which copies around and stripes data as it sees fit. I am not sure with this many levels of abstraction I can gain any measurable performance improvement by adjusting the XFS to the controller's hypothetical behaviour. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS in low RAM settings
Hello listmates, I have been playing with Xen VM's and was wondering what the minimum RAM size in which you could run CentOS 5.5 (i386). So far I managed to install in 256 MB or 512 MB and then shrink the VM's RAM to 128 MB and still run the installation. Would anyone know why the install in a 128 MB VM fails (even in text mode)? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GFS/GFS2 on CentOS
On Tue, Aug 10, 2010 at 11:53 AM, Ray Van Dolson ra...@bludgeon.org wrote: On Tue, Aug 10, 2010 at 11:48:17AM -0400, Boris Epstein wrote: Hi all, If you have had experience hosting GFS/GFS2 on CentOS machines could you share you general impression on it? Was it realiable? Fast? Any issues or concerns? I've only run GFS2 on RHEL5. It's been quite reliable, but certainly has a bit of a learning curve from regular filesystems. It's fast enough, but if you have more than one node, keep in mind you'll potentially be held back by lock manager contention under certain workloads (like reading information on every inode on the system for backup purposes, etc). For our uses (home directory server), it's more than adequate. Also, how feasible is it to start it on just one machine and then grow it out if necessary? Haven't yet done this, but it can run on top of LVM just fine (clvm in fact). Thanks. Boris. Ray ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks Ray! Is it feasible to export GFS to NFS clients? And one more interesting thing. Wikipedia ( http://en.wikipedia.org/wiki/Global_File_System ) says that GFS2 is supported only starting at kernel 2.6.19 but on my CentOS 5.5 uname says: [bepst...@dellnikon ~]$ uname -a Linux dellnikon 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT 2010 i686 i686 i386 GNU/Linux [bepst...@dellnikon ~]$ Could thins be a problem? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GFS/GFS2 on CentOS
Nope, Red Hat backports the necessary bits from the newer kernels into their 2.6.18 stable release, so you should be all set. Ray ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos This is interesting... What's the rationale for that? Why not advance the version numbers if you incorporate the newer features anyhow? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] GFS/GFS2 on CentOS
Hi all, If you have had experience hosting GFS/GFS2 on CentOS machines could you share you general impression on it? Was it realiable? Fast? Any issues or concerns? Also, how feasible is it to start it on just one machine and then grow it out if necessary? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] dhcp server
On Mon, Aug 9, 2010 at 1:15 AM, Richard Gliebe richard.gli...@fhv.at wrote:
Hi all,
this is my first post on this list, hope someone can help me.
I have to run a dhcp server on CentOS release 5.5 (Final).
# yum list| grep -i dhcp
dhcp.x86_64 12:3.0.5-23.el5 installed
dhcp-devel.x86_64 12:3.0.5-23.el5 installed
dhcpv6-client.x86_64 1.0.10-18.el5 installed
after starting the dhcpd daemon, the windows Clients on the subnet
(192.168.100.0/24) tells me, that there is no dhcp server available.
# /etc/init.d/dhcpd configtest
Syntax: OK
[/var/log/messages]
Aug 9 07:11:14 tfelx01 dhcpd: Internet Systems Consortium DHCP Server
V3.0.5-RedHat
Aug 9 07:11:14 tfelx01 dhcpd: Copyright 2004-2006 Internet Systems
Consortium.
Aug 9 07:11:14 tfelx01 dhcpd: All rights reserved.
Aug 9 07:11:14 tfelx01 dhcpd: For info, please visit
http://www.isc.org/sw/dhcp/
Aug 9 07:11:14 tfelx01 dhcpd: Wrote 0 leases to leases file.
Aug 9 07:11:14 tfelx01 dhcpd: Listening on
LPF/eth0/00:1a:64:b6:1d:1c/192.168.100/24
Aug 9 07:11:14 tfelx01 dhcpd: Sending on
LPF/eth0/00:1a:64:b6:1d:1c/192.168.100/24
Aug 9 07:11:14 tfelx01 dhcpd: Sending on Socket/fallback/fallback-net
this is my /etc/dhcpd.conf
# cat /etc/dhcpd.conf
authoritative;
ddns-update-style interim;
subnet 192.168.100.0 netmask 255.255.255.0 {
option routers 192.168.100.11;
option subnet-mask 255.255.255.0;
option domain-name mydomain.local;
option domain-name-servers 192.168.100.2;
option time-offset -18000; # Eastern Standard Time
range 192.168.100.150 192.168.100.199;
}
what do I'm missing? or is there a config mismatch?
many thanks
Richard
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Richard,
I don't have time to go through that config line by line but here is
mine that works. It is not perfect, has some unnecessary stuff in it,
the domain used is a private domain but like I said it works so it
must have at least as much as necessary to make it work.
[bepst...@dellnikon ~]$ more /etc/dhcpd.conf
ddns-update-style interim;
ignore client-updates;
subnet 192.168.65.0 netmask 255.255.255.128 {
# --- default gateway
option routers 192.168.65.1;
option subnet-mask 255.255.255.128;
option nis-domain nrims;
option domain-name nrims;
option domain-name-servers 192.168.65.1,132.183.243.118,132.183.1.1
1;
option time-offset -18000; # Eastern Standard Time
# option ntp-servers 192.168.1.1;
# option netbios-name-servers 192.168.1.1;
# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- you understand Netbios very well
# option netbios-node-type 2;
default-lease-time 21600;
max-lease-time 43200;
range 192.168.65.50 192.168.65.125;
# we want the nameserver to appear at a fixed address
host ns {
next-server marvin.redhat.com;
hardware ethernet 12:34:56:78:AB:CD;
fixed-address 207.175.42.254;
}
}
[bepst...@dellnikon ~]$
-
Hope it helps.
Boris.
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
[CentOS] XEN virtualization of a Windows installation
Hello listmates, Is there a good manual anywhere on how to boot a dual-boot Linux/Windows machine into Linux and launch the Windows as a XEN virtual machine? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] XEN virtualization of a Windows installation
Thanks . I saw those docs and many more, but for some reason could not find the scenario I am interested in. Thanks. Boris. On Mon, Aug 9, 2010 at 3:02 PM, James Hogarth james.hoga...@gmail.comwrote: Google redhat virtualisation guide to get the official docs. Sent from Android Mobile On 9 Aug 2010 19:41, Boris Epstein borepst...@gmail.com wrote: Hello listmates, Is there a good manual anywhere on how to boot a dual-boot Linux/Windows machine into Linux and launch the Windows as a XEN virtual machine? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] finding out the time of the second-to-last reboot
Hello all, I've got a CentOS box that became non-responsive today for some obscure reason and had to be rebooted. Is there a way to find out when it last had to be rebooted before today? uptime gives you no history past the very last reboot, so obviously I need to find some other way to get an answer to my question. Thanks for any and all tips. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] NAT via /etc/sysconfig/iptables
Hello listmates, It's been a few years since I've set up a router... and for some reason I seem to be getting hung up on this one. Does anybody have a sample iptables config file that would incorporate NAT and forwarding for a simple router? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.5/i386/32-bit CD installation hickups
On Wed, Jul 28, 2010 at 7:23 AM, Stephen Harris li...@spuddy.org wrote: On Wed, Jul 28, 2010 at 03:39:46AM -0700, John Doe wrote: From: Boris Epstein borepst...@gmail.com By the way - since it sounds like you have the experience - how easy is it to mirror CentOS repositories locally? How much space do I need, roughly? I mirror it manualy (os from the DVDs and update with a simple rsync), although there is a createrepo package for mirroring repos. You don't need a createrepo or anything else like; just a simple rsync. I also copy the DVD and updates. For i386: % du -hs /RedHat/DVD/CentOS-5.5 3.9G /RedHat/DVD/CentOS-5.5 % du -hs /RedHat/updates/centos5.5/i386 1.7G /RedHat/updates/centos5.5/i386 For x86_64: % du -hs /RedHat/DVD/CentOS-5.5_x86_64 4.4G /RedHat/DVD/CentOS-5.5_x86_64 % du -hs /RedHat/updates/centos5.5/x86_64 1.9G /RedHat/updates/centos5.5/x86_64 The rsync script is pretty simple; I run it from cron regularly. #!/bin/sh cd /RedHat/updates/centos5.5 || exit rsync --delete -rlptDzHq rsync://mirrors.kernel.org/centos/5.5/updates/i386 . rsync --delete -rlptDzHq rsync://mirrors.kernel.org/centos/5.5/updates/x86_64 . Then I can set up my yum.repos.d similar to this: [c5-local] name=CentOS-$releasever - Media baseurl=file:///RedHat/DVD/CentOS-5/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 protect=1 priority=1 enabled=1 [update-local] name=CentOS-$releasever - Updates local baseurl=file:///RedHat/updates/centos$releasever/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 protect=1 priority=1 enabled=1 And, of course, disable the default repositories. -- rgds Stephen ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks, Stephen, looks like an excellent set of instructions. I may well try that. Why should I disable the default repositories, though? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.5/i386/32-bit CD installation hickups
On Wed, Jul 28, 2010 at 10:27 AM, Stephen Harris li...@spuddy.org wrote: On Wed, Jul 28, 2010 at 08:52:55AM -0400, Boris Epstein wrote: On Wed, Jul 28, 2010 at 7:23 AM, Stephen Harris li...@spuddy.org wrote: [c5-local] name=CentOS-$releasever - Media baseurl=file:///RedHat/DVD/CentOS-5/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 protect=1 priority=1 enabled=1 [update-local] name=CentOS-$releasever - Updates local baseurl=file:///RedHat/updates/centos$releasever/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5 protect=1 priority=1 enabled=1 And, of course, disable the default repositories. Why should I disable the default repositories, though? If you don't then you'll have the default internet based repositories _and_ your local mirror both providing packages at the same time, and you'll gain no benefit for having the local mirror. -- rgds Stephen ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Oh, right, sure. Sorry, I wasn't thinking. I thought you were telling me not to use the content of those repositories - and I couldn't figure out why. Thanks again. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.5/i386/32-bit CD installation hickups
On Tue, Jul 27, 2010 at 2:52 PM, Benjamin Franz jfr...@freerun.com wrote: On 07/27/2010 11:18 AM, Boris Epstein wrote: Hello listmates, I've got a few older 32-bit PC's that only have a CD drive (no DVD). So I downloaded all the ISO's and I thought I'd install CentOS 5.5 on this 1.25 GB P-3 (I think, don't remember what CPU it's got right off hand, not that it should matter). So I tried it there, got a fatal exception. OK, no problem - thinking that maybe something was wrong with that machine I decided to try it on a different one, a P-3 with 384 MB or RAM. Same thing happened. So here's my question: has anybody successfully installed CentOS 5.5 on a 32-bit machine (i386) using individual CD's as their installation media? The closest I have is a P3 with 1 GByte of RAM over HTTP using the 5.4 netinstall CD that I installed several months ago (I keep a local mirror of the CentOS tree). That worked fine for me. My first thought on a machine that old would be either flaky memory or or a flaky CD drive. I would run memtest86+ on them and then try a network install. You can mount the DVD ISO on loopback on a webserver for an install source. -- Benjamin Franz ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Benjamin, I just used the netinstall to load CentOS 5.5 from a mounted ISO of the DVD and on one of the machines in question it worked like a charm. Thanks once again for an excellent suggestion. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS 5.5/i386/32-bit CD installation hickups
Hello listmates, I've got a few older 32-bit PC's that only have a CD drive (no DVD). So I downloaded all the ISO's and I thought I'd install CentOS 5.5 on this 1.25 GB P-3 (I think, don't remember what CPU it's got right off hand, not that it should matter). So I tried it there, got a fatal exception. OK, no problem - thinking that maybe something was wrong with that machine I decided to try it on a different one, a P-3 with 384 MB or RAM. Same thing happened. So here's my question: has anybody successfully installed CentOS 5.5 on a 32-bit machine (i386) using individual CD's as their installation media? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.5/i386/32-bit CD installation hickups
On Tue, Jul 27, 2010 at 2:25 PM, m.r...@5-cent.us wrote: Boris Epstein wrote: Hello listmates, I've got a few older 32-bit PC's that only have a CD drive (no DVD). So I downloaded all the ISO's and I thought I'd install CentOS 5.5 on this 1.25 GB P-3 (I think, don't remember what CPU it's got right off hand, not that it should matter). So I tried it there, got a fatal exception. OK, no problem - thinking that maybe something was wrong with that machine I decided to try it on a different one, a P-3 with 384 MB or RAM. Same thing happened. So here's my question: has anybody successfully installed CentOS 5.5 on a 32-bit machine (i386) using individual CD's as their installation media? How much memory on the system? You *might* want to check the BIOS for some weird setting - like the ones I had for OS2 installs mark Mark, Thanks for replying. Like I said, there have so far been two systems, one with 384 MB RAM and one with 1.25 GB of RAM. Both get what appears to be the same (or similar) exception. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.5/i386/32-bit CD installation hickups
On Tue, Jul 27, 2010 at 2:52 PM, Benjamin Franz jfr...@freerun.com wrote: On 07/27/2010 11:18 AM, Boris Epstein wrote: Hello listmates, I've got a few older 32-bit PC's that only have a CD drive (no DVD). So I downloaded all the ISO's and I thought I'd install CentOS 5.5 on this 1.25 GB P-3 (I think, don't remember what CPU it's got right off hand, not that it should matter). So I tried it there, got a fatal exception. OK, no problem - thinking that maybe something was wrong with that machine I decided to try it on a different one, a P-3 with 384 MB or RAM. Same thing happened. So here's my question: has anybody successfully installed CentOS 5.5 on a 32-bit machine (i386) using individual CD's as their installation media? The closest I have is a P3 with 1 GByte of RAM over HTTP using the 5.4 netinstall CD that I installed several months ago (I keep a local mirror of the CentOS tree). That worked fine for me. My first thought on a machine that old would be either flaky memory or or a flaky CD drive. I would run memtest86+ on them and then try a network install. You can mount the DVD ISO on loopback on a webserver for an install source. -- Benjamin Franz ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Benjamin, Thank you, those are excellent suggestions. I will try that, most likely. By the way - since it sounds like you have the experience - how easy is it to mirror CentOS repositories locally? How much space do I need, roughly? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] redundant networked secure file system recommendation
Hi all, We are currently running a NFS-based server centric setup. I would like to set up something where I can easily have more than one redundant server, security/authentication (this part seems a little flaky with NFS, at least did several years ago), with the capability to easily add/remove servers as necessary, take redundant servers down for maintenance, etc. Total volume we expect to run on the server side will be somewhere between 10-30 TB. The servers will most likely be CentOS machines, the clients mostly Linux machines with some Macs and possibly Windows (the latter part not that important). Any insight, thoughts and recommendations will be much appreciated. Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Redundant LAN routing possible?
On Sat, Jul 10, 2010 at 5:21 PM, Emmanuel Noobadmin centos.ad...@gmail.com wrote: I've been reading that it's possible to set up a system with multiple NIC to provide redundant internet connectivity such that it will switch to a secondary connection if the primary ISP fails. Is it possible in a similar way to setup redundant LAN routing? I read that it is possible to aggregate/bond multiple NIC to stackable switches that support link aggregation and redundancy. But if only simple switches are available, is something like this possible? e.g. System A eth0 - lan switch/router 1 eth1 - lan switch/router 2 System B eth0 - lan switch 1 eth1 - lan switch 2 Then somehow specify that, if lan switch 1 fails, the two systems will switch to using switch 2 so that in case of a switch failure, the network continues to remain operational. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I'd think for this to be possible you will need a router with multiple WAN addresses/interfaces... I am not sure how that pertains to your LAN per se. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] versioning file system for Linux
Hi all, I would be nice if we could find a reliable versioning file system to use as an underlying revision control mechanism. Going by this http://en.wikipedia.org/wiki/Versioning_file_system there aren't all that many options but I am still hopeful. We would most likely be hosting it on a CentOS machine. If you have a perspective on this please share it. Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] versioning file system for Linux
On Fri, Jun 25, 2010 at 9:01 AM, Boris Epstein borepst...@gmail.com wrote: Hi all, I would be nice if we could find a reliable versioning file system to use as an underlying revision control mechanism. Going by this http://en.wikipedia.org/wiki/Versioning_file_system there aren't all that many options but I am still hopeful. We would most likely be hosting it on a CentOS machine. If you have a perspective on this please share it. Thanks. Boris. Apparently, FSFS is considered a fairly powerful option... same for WebDAV. Studying them right now. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] XFS on CentOS
Hi all, Does anybody know why unlike so many Linux distros (Fedora, Ubuntu, OpenSUSE) CentOS does not come with XFS support by default but rather requires custom modifications after the install in order for you to be able to support XFS on your CentOS machine? Just seems a little odd given how much CentOS is oriented to be used as a server OS. Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] XFS on CentOS
On Tue, Jun 22, 2010 at 12:35 PM, aurfalien aurfal...@gmail.com wrote: On 06/22/2010 08:57 AM, Boris Epstein wrote: Hi all, Does anybody know why unlike so many Linux distros (Fedora, Ubuntu, OpenSUSE) CentOS does not come with XFS support by default but rather requires custom modifications after the install in order for you to be able to support XFS on your CentOS machine? Just seems a little odd given how much CentOS is oriented to be used as a server OS. Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I've always thought that Centos follows RHEL exactly, cuz it is made from there source. I think this is better asked of RHEL. If Centos were to deviate from the RHEL dev path, then ity may no longer be Centos. Am I wrong? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Good points. OK, then: why does RHEL not support XFS straight out of the box? :) Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] NFS - Permission Denied
On Thu, Jun 17, 2010 at 12:17 PM, James Corteciano ja...@linux-source.org wrote: Hi All, This is the settings of my NFS server (192.168.10.55) /etc/exports: /nfs/iso 192.168.10.0/255.255.255.0(rw,sync) From the remote host, I mount it correctly. But when I write/create files/directory inside the mounted nfs directory (from /nfs/test), it will give me Permission Denied. [r...@remote]# mount -t nfs 192.168.10.55:/nfs/iso /nfs/test [r...@remote]# mkdir /nfs/test/testing mkdir: cannot create directory `testing': Permission denied Hope anyone could help me to fix this. Thank you. Regards, James ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos James, On the server, who owns /nfs/iso? What are the permissions on that directory? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] clustered file system of choice
Hi all, I am just trying to consider my options for storing a large mass of data (tens of terrabytes of files) and one idea is to build a clustered FS of some kind. Has anybody had any experience with that? Any recommendations? Thanks in advance for any and all advice. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] clustered file system of choice
On Wed, Jun 16, 2010 at 4:05 PM, m.r...@5-cent.us wrote: Boris wrote: I am just trying to consider my options for storing a large mass of data (tens of terrabytes of files) and one idea is to build a clustered FS of some kind. Has anybody had any experience with that? Any recommendations? We've been looking at glusterfs here. It's under active development, has some problems, but it does work, and is in use a number of places around the world. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks Mark, Will surely check Glusterfs out. What's your thoughts on GPFS: http://en.wikipedia.org/wiki/GPFS ? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] PHP file upload limit
On Wed, Jun 9, 2010 at 3:47 PM, Jerry Franz jfr...@freerun.com wrote: On 06/09/2010 12:32 PM, Boris Epstein wrote: Eero, I've got 4 GB of swap. At the moment all 4 GB less 100 MB of it is available. That logically should be enough to allow me to upload a 2 GB file, I would think. Looking at the bugtracker: http://bugs.centos.org/view.php?id=3118 PHP is not built with large file support on 32 bit x86, probably other 32 bit platforms, all releases of CentOS 4 Additional Information I verified that upstream does not have this problem. It is severe enough for my use (scientific processing) that I am changing OS. While the report is for CentOS4, it may be related to your problem. -- Benjamin Franz ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos OK, at least part of it could have been related to the machine being 32 bit. I am currently playing with a 64 bit machine. I can set my upload_max_filesize = 2G and that works fine; however, post_max_size is a problem. if I set it to 2 G it seems to fail (no POST transactions go through, it seems). If I set it just a tad lower (what I have now is post_max_size = 1948M ) it works fine. So the cutoff limit is somewhere in the 2G neighborhood. Any idea why that would be? Is there a parameter anywhere that limits how far post_max_size may go? The total memory setting I use is way above ( memory_limit = 6G ) and that seems not to cause any issues. Thanks for your advice everybody. Cheers, Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] PHP file upload limit
On Fri, Jun 11, 2010 at 10:59 AM, Boris Epstein borepst...@gmail.com wrote: On Wed, Jun 9, 2010 at 3:47 PM, Jerry Franz jfr...@freerun.com wrote: On 06/09/2010 12:32 PM, Boris Epstein wrote: Eero, I've got 4 GB of swap. At the moment all 4 GB less 100 MB of it is available. That logically should be enough to allow me to upload a 2 GB file, I would think. Looking at the bugtracker: http://bugs.centos.org/view.php?id=3118 PHP is not built with large file support on 32 bit x86, probably other 32 bit platforms, all releases of CentOS 4 Additional Information I verified that upstream does not have this problem. It is severe enough for my use (scientific processing) that I am changing OS. While the report is for CentOS4, it may be related to your problem. -- Benjamin Franz ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos OK, at least part of it could have been related to the machine being 32 bit. I am currently playing with a 64 bit machine. I can set my upload_max_filesize = 2G and that works fine; however, post_max_size is a problem. if I set it to 2 G it seems to fail (no POST transactions go through, it seems). If I set it just a tad lower (what I have now is post_max_size = 1948M ) it works fine. So the cutoff limit is somewhere in the 2G neighborhood. Any idea why that would be? Is there a parameter anywhere that limits how far post_max_size may go? The total memory setting I use is way above ( memory_limit = 6G ) and that seems not to cause any issues. Thanks for your advice everybody. Cheers, Boris. Here's what further research on the topic indicates: it is unclear whether or not PHP can handle files in excess of 2 GB in size. If it can that would still be a relatively recent achievement. So in short it sounds like - at this point in time - it may be safest simply not to try to handle files that size. See here: http://www.bigresource.com/PHP-is-there-a-limit-to-post_max_size--1sjou1Ke.html http://www.bigresource.com/PHP-PHP-2GB-filesize-limit-pfHnjwXh.html http://bugs.php.net/bug.php?id=27792 http://drupal.org/node/787484 Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] PHP file upload limit
Hi all, I am trying to run a web-based PHP application on a CentOS 5 32-bit machine that requires me to upload large files. The machine also happens to have little RAM (256MB). I have no problem setting my upload limit ( upload_max_filesize ) to 1 GB but for some reason 2 GB or above seems to be no go. Would anybody know why? Could it be one of the many 32-bit vs 64-bit issues? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] PHP file upload limit
On Wed, Jun 9, 2010 at 3:25 PM, Eero Volotinen eero.voloti...@iki.fi wrote: 2010/6/9 Boris Epstein borepst...@gmail.com: Hi all, I am trying to run a web-based PHP application on a CentOS 5 32-bit machine that requires me to upload large files. The machine also happens to have little RAM (256MB). I have no problem setting my upload limit ( upload_max_filesize ) to 1 GB but for some reason 2 GB or above seems to be no go. Would anybody know why? Could it be one of the many 32-bit vs 64-bit issues? add more swap and memory ? -- Eero ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Eero, I've got 4 GB of swap. At the moment all 4 GB less 100 MB of it is available. That logically should be enough to allow me to upload a 2 GB file, I would think. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] 12-15 TB RAID storage recommendations
Hello listmates, I would like to build a 12-15 TB RAID 5 data server to run under ContOS. Any recommendations as far as hardware, configuration, etc? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 12-15 TB RAID storage recommendations
On Tue, Apr 13, 2010 at 1:14 PM, Ryan Manikowski r...@devision.us wrote: On 4/13/2010 1:05 PM, Boris Epstein wrote: Hello listmates, I would like to build a 12-15 TB RAID 5 data server to run under ContOS. Any recommendations as far as hardware, configuration, etc? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Chassis - CSE-836A-R1200B Supermicro SC836 A-R1200B - Rack-mountable - 3U - SATA/SAS - hot-swap - power supply 1200 Watt RAID Card - 3ware 9650SE-16ML-SGL 9650SE-16ML-SGL RAID 0/1/5/6/10/50 16CH SATA II PCIE 256MB ECC DDR2 - PCI Express x8 - Up to 300MBps - 4 x SATA x4 Serial ATA/300 - Serial ATA BBU Module for RAID card - 3ware BBU-MODULE-03 Pick the cpu(s) and motherboard to fit the chassis. Obviously go with ECC ram and ONLY enterprise grade hard drives. To ensure compatibility check with 3ware to see which drives they recommend. Areca RAID cards will get you a little better performance but the module for the 9650SE series of 3ware cards is included with the Centos kernel. Getting the Areca driver going is a bit more work, but nothing that would be considered a huge hurdle for a competent sysadmin. Also, if you're looking for advice on Areca products call their Tekram contact in the USA. Their other distributors have been less than stellar on answering pre-sales questions. -- Ryan Manikowski ]] Devision Media Services LLC [[ www.devision.us r...@devision.us | 716.771.2282 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks Ryan! So, basically, I take it you've had positive experience with that Supermicro box. It does look good and seems fairly inexpensive, too. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 12-15 TB RAID storage recommendations
On Tue, Apr 13, 2010 at 2:30 PM, Joseph L. Casale jcas...@activenetwerx.com wrote: I would like to build a 12-15 TB RAID 5 data server to run under ContOS. Any recommendations as far as hardware, configuration, etc? This comes up often:) Things to keep in mind when using large discs if you suffer a failure, while rebuilding in a degraded state it's not impossible or unlikely to drop another disc loosing it all. Rebuild times especially on busy arrays with large discs take lots of time... ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks Joseph! In your opinion, if we are talking about 15 2-TB disks what does lots of time translate to? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] anybody with Remote-Anything experience?
Hello listmates, Has anyone got any experience running Remote-Anything ( http://remote-anything.com/ ) under Linux as a client (i.e., connecting from a Linux box t oa Windows box with a view of controlling the latter)? Is it even possible? If the answer to this last question is yes how does one do that? Thanks in advance. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] anybody with Remote-Anything experience?
On Tue, Mar 30, 2010 at 1:39 PM, Benjamin Franz jfr...@freerun.com wrote: Boris Epstein wrote: Hello listmates, Has anyone got any experience running Remote-Anything ( http://remote-anything.com/ ) under Linux as a client (i.e., connecting from a Linux box t oa Windows box with a view of controlling the latter)? Is it even possible? If the answer to this last question is yes how does one do that? You have some reason for not using the built-in Remote Desktop support in windows? It works fine from Linux clients. -- Benjamin Franz ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Not really - except that the Windows machine is highly custom and I don't have full control over it. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] gphoto2 and Nikon Coolpix 990/995
Hi all,
I've got a CentOS 5.4 box and am trying to use it to control either
of the two old cameras we've got, one being Nikon Coolpix 990 and the
other Nikon Coolpix 995. Accessing either I get the following message:
*** Error ***
An error occurred in the io-library ('Could not claim the USB
device'): Could not claim interface 0 (Operation not permitted). Make
sure no other program or kernel module (such as sdc2xx, stv680,
spca50x) is using the device and you have read/write access to the
device.
ERROR: Could not capture.
*** Error (-53: 'Could not claim the USB device') ***
Any idea what this could be about?
By the way, about a year ago I did manage to use a Linux machine to
control one of these cameras (the 990, I believe).
Thanks in advance.
Boris.
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] gphoto2 and Nikon Coolpix 990/995
On Fri, Mar 26, 2010 at 3:10 PM, Akemi Yagi amy...@gmail.com wrote:
On Fri, Mar 26, 2010 at 11:53 AM, Boris Epstein borepst...@gmail.com wrote:
Hi all,
I've got a CentOS 5.4 box and am trying to use it to control either
of the two old cameras we've got, one being Nikon Coolpix 990 and the
other Nikon Coolpix 995. Accessing either I get the following message:
*** Error ***
An error occurred in the io-library ('Could not claim the USB
device'): Could not claim interface 0 (Operation not permitted). Make
sure no other program or kernel module (such as sdc2xx, stv680,
spca50x) is using the device and you have read/write access to the
device.
ERROR: Could not capture.
*** Error (-53: 'Could not claim the USB device') ***
Any idea what this could be about?
By the way, about a year ago I did manage to use a Linux machine to
control one of these cameras (the 990, I believe).
Is the camera set to the PTP mode? Try running 'tail -f
/var/log/messages' while connecting the camera and see how it is being
recognized.
Akemi
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Thanks.
Just disconnected and reconnected the camera again, got the following:
--
Mar 26 15:23:51 antwerp kernel: usb 2-1: USB disconnect, address 2
Mar 26 15:23:55 antwerp kernel: usb 2-1: new full speed USB device
using uhci_hcd and address 3
Mar 26 15:23:55 antwerp kernel: usb 2-1: configuration #1 chosen from 1 choice
--
Looks like the camera is being recognized at least to some degree:
[antw...@bepstein][~/scratch] lsusb
Bus 001 Device 001: ID :
Bus 002 Device 003: ID 04b0:0102 Nikon Corp. Coolpix 990
Bus 002 Device 001: ID :
Bus 003 Device 001: ID :
Bus 004 Device 001: ID :
[antw...@bepstein][~/scratch]
Boris.
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] gphoto2 and Nikon Coolpix 990/995
On Fri, Mar 26, 2010 at 3:33 PM, Akemi Yagi amy...@gmail.com wrote: On Fri, Mar 26, 2010 at 12:25 PM, Boris Epstein borepst...@gmail.com wrote: On Fri, Mar 26, 2010 at 3:10 PM, Akemi Yagi amy...@gmail.com wrote: Is the camera set to the PTP mode? Try running 'tail -f /var/log/messages' while connecting the camera and see how it is being recognized. Just disconnected and reconnected the camera again, got the following: -- Mar 26 15:23:51 antwerp kernel: usb 2-1: USB disconnect, address 2 Mar 26 15:23:55 antwerp kernel: usb 2-1: new full speed USB device using uhci_hcd and address 3 Mar 26 15:23:55 antwerp kernel: usb 2-1: configuration #1 chosen from 1 choice -- Looks like the camera is being recognized at least to some degree: [antw...@bepstein][~/scratch] lsusb Bus 001 Device 001: ID : Bus 002 Device 003: ID 04b0:0102 Nikon Corp. Coolpix 990 Bus 002 Device 001: ID : Bus 003 Device 001: ID : Bus 004 Device 001: ID : [antw...@bepstein][~/scratch] Looking good. Now what do you get with the command: gphoto2 --auto-detect Akemi ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos [antw...@bepstein][~/scratch] gphoto2 --auto-detect Model Port -- Nikon CoolPix 990 usb: [antw...@bepstein][~/scratch] Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] gphoto2 and Nikon Coolpix 990/995
On Fri, Mar 26, 2010 at 3:37 PM, Akemi Yagi amy...@gmail.com wrote:
On Fri, Mar 26, 2010 at 12:34 PM, Boris Epstein borepst...@gmail.com wrote:
On Fri, Mar 26, 2010 at 3:33 PM, Akemi Yagi amy...@gmail.com wrote:
Looking good. Now what do you get with the command:
gphoto2 --auto-detect
Akemi
[antw...@bepstein][~/scratch] gphoto2 --auto-detect
Model Port
--
Nikon CoolPix 990 usb:
[antw...@bepstein][~/scratch]
Boris.
So far, so good. Now, what command/application did you run when you
got the error message in your original post?
Akemi
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
[antw...@bepstein][~/scratch] gphoto2 --capture-image
*** Error ***
An error occurred in the io-library ('Could not claim the USB
device'): Could not claim interface 0 (Operation not permitted). Make
sure no other program or kernel module (such as sdc2xx, stv680,
spca50x) is using the device and you have read/write access to the
device.
ERROR: Could not capture.
*** Error (-53: 'Could not claim the USB device') ***
For debugging messages, please use the --debug option.
Debugging messages may help finding a solution to your problem.
If you intend to send any error or debug messages to the gphoto
developer mailing list gphoto-de...@lists.sourceforge.net, please run
gphoto2 as follows:
env LANG=C gphoto2 --debug --capture-image
Please make sure there is sufficient quoting around the arguments.
[antw...@bepstein][~/scratch]
Running the debug version essentially yields the same plus lots of
step-by-step messages regarding the comms to and from the camera.
Boris.
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
[CentOS] file/data server running CentOS
Hi all, I am trying to build a file server providing about 10 TB of effective RAID5/6 storage. Any recommendations as far as hardware, configuration, etc. - preferably based on recent experience - would be most welcome. Thanks in advance. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RAID 5 setup?
On Thu, Mar 25, 2010 at 3:36 PM, Robert Heller hel...@deepsoft.com wrote: At Thu, 25 Mar 2010 12:24:57 -0700 (PDT) CentOS mailing list centos@centos.org wrote: Can anyone provide a tutorial or advice on how to configure a software RAID 5 from the command-line (since I did not install Gnome)? I have 8 x 1.5tb Drives. mdadm --create /dev/md0 --level=5 --raid-devices=7 /dev/sd[abcdefg]1 The above will create a level 5 RAID named /dev/md0 of /dev/sda1 /dev/sdb1 /dev/sda1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1, with hot-spare /dev/sdg1 Note: RAID5 is not really recomended for such large disks. You run the risk of a complete data loss if one disk fails and the another disk fails during the rebuild. -Jason ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Robert Heller -- 978-544-6933 Deepwoods Software -- Download the Model Railroad System http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows hel...@deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Robert, Why is the size a factor here? Why would this be OK with smaller disks? How would you partition this instead? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RAID 5 setup?
On Thu, Mar 25, 2010 at 5:27 PM, Hakan Koseoglu ha...@koseoglu.org wrote: On Thu, Mar 25, 2010 at 9:07 PM, Boris Epstein borepst...@gmail.com wrote: Note: RAID5 is not really recomended for such large disks. You run the risk of a complete data loss if one disk fails and the another disk fails during the rebuild. Why is the size a factor here? Why would this be OK with smaller disks? How would you partition this instead? As the disks get bigger, rebuild time also increases and the performance of the disks don't increase linearly with their storage. This means that when you are rebuilding a disk, the chances of one of your other disks failing becomes significantly large. Most suggest RAID6 these days as a minimum, mirroring and striping appears to be the most popular. -- Hakan (m1fcj) - http://www.hititgunesi.org ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Hakan, You surely do have a point there. However, it is still not all that likely that a disk will fail during the rebuild time in question (what are we talking? some hours max?) Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] IPSec VPN Setup?
On Wed, Mar 10, 2010 at 3:15 AM, Jobst Schmalenbach jo...@barrett.com.au wrote: Hi I can second that, Openswan is the way to go (sorry the ONLY way to go). Centos has the latest, but I would highly recommend to have Centos on both ends. Centos is one of the distros that uses NSS by default and standard out of the box, so this makes is easier. There's also a PDF booklet (get that from amazon, its written by Paul Wouters, one of the Openswan developers), link on the website. The toughest part is getting the keys and connections right, personally I would not do it without subscribing to us...@openswan.org first, they are helpfull and you will find Paul on the list, too. Been using Openswan (well it used to be freeS/WAN, hence the animal used) for many years and once you set it up and have the key exchange working you never have to change a thing again other then (in my case) yum update openswan. jobst On 10/03/2010 18:08, Geoff Galitz wrote: I use Openswan regularly for IPSec VPN connections to remote sites. Although the documentation is a bit lacking it is pretty easy to get going once you've played with it a bit. It is reliable, widely available and the openswan users support list is responsive. If you have trouble connecting to the remote side, ike-scan can help in getting your key exchange settings right. That is usually the hard part, in my experience. -geoff - Geoff Galitz Blankenheim NRW, Germany http://www.galitz.org/ http://german-way.com/blog/ -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Ski Dawg Sent: Mittwoch, 10. März 2010 02:12 To: centos@centos.org Subject: [CentOS] IPSec VPN Setup? Hello Everyone, I have been tasked at work with setting up a VPN connection from our server to a client's network. The only problem is that I have never done anything like this before, so I am not sure where to start. We are running CentOS 5.4 on our server. I do not yet know what the client is running for their VPN, the only thing I know of from the client, is we need to use IPSec for our VPN connection to them. I have been googling, and have found quite a bit of information, but it is a little overwhelming, as I am new to setting up a VPN. Is the a standard method for doing this sort of setup that I am missing so far? If anyone has any quick pointers to get me started, that would be greatly appreciated. -- Doug Registered Linux User #285548 (http://counter.li.org) Never trust a computer you can't throw out a window. -- Steve Wozniak ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Jobst Schmalenbach General Manager, Webdevelopment and Tech Support P +61 3 9532 7677 M +61 411 611 855 e ...@barrett.com.au W www.barrett.com.au Everybody lives by selling something Sales Training, Consulting, Coaching, Seminars and Resources Barrett Sales Blog Subscribe to receive free weekly advice and tips for people who live by selling something ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I run a VPN server using OpenVPN. Looks like pretty robust technology to me. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] IPSec VPN Setup?
On Wed, Mar 10, 2010 at 12:07 PM, Eero Volotinen eero.voloti...@iki.fi wrote: I run a VPN server using OpenVPN. Looks like pretty robust technology to me. but openvpn is not ipsec. Good point. Sorry, my fault, I just wasn't paying attention. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [OT] 8-15 TB storage: any recommendations?
On Thu, Jan 7, 2010 at 9:27 AM, Karanbir Singh mail-li...@karan.org wrote: On 01/06/2010 09:35 PM, Boris Epstein wrote: Hello everyone, This is not directly related to CentOS but still: we are trying to set up some storage servers to run under Linux - most likely CentOS. The storage volume would be in the range specified: 8-15 TB. Any recommendations as far as hardware? I would recommend dont-homebrew. Get a vendor to build you a 3/4U box, get a couple of quad core cpu's in, and enough ram to do you in-use buffers. Also dont go over 1 TiB in storage per spindle if you want to get even relatively reasonable performance ( even when in use as a filer box ). Not long back, I had the chance to do some performance metrics on a dual Areca-16xx hosted 24x1TiB disk setup - and we tested it for various loads, running CentOS-5.4/x86_64 and it consistently outperformed the sun thumper box's, coming in about 1/4th the price. The other thing to keep in mind is to estimate and prove the cpu processing capability and network capability you are going to need out of this machine and dont skim on that. Dont just get overly focused on just the hba and disk metrics. - KB ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos KB, thanks. When you say dont go over 1 TiB in storage per spindle what are you referring to as spindle? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 8-15 TB storage: any recommendations?
On Thu, Jan 7, 2010 at 11:09 AM, Matty matt...@gmail.com wrote: On Thu, Jan 7, 2010 at 8:08 AM, Chan Chung Hang Christopher christopher.c...@bradbury.edu.hk wrote: John Doe wrote: From: Boris Epstein borepst...@gmail.com This is not directly related to CentOS but still: we are trying to set up some storage servers to run under Linux - most likely CentOS. The storage volume would be in the range specified: 8-15 TB. Any recommendations as far as hardware? Depends on your budget. Here, we use HP DL180 servers (12 x 1TB disks in 2U)... You can also check Sun Fire X servers; up to 48 x 1TB in 4U... Somebody said something about Sun servers being pricey and that quality was going downhill...something about cheap controllers...any comments on this? We have a bunch of X4540 Netbackup media servers running Solaris 10 + ZFS. While I can't comment on all of the controllers Sun uses, the SATA chipset / controllers in the 4540 seem to be pretty solid so far (our backup servers process 20TB+ of data each day). - Ryan -- http://prefetch.net ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks Ryan! What price range (roughly) are we talking here? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] 8-15 TB storage: any recommendations?
Hello everyone, This is not directly related to CentOS but still: we are trying to set up some storage servers to run under Linux - most likely CentOS. The storage volume would be in the range specified: 8-15 TB. Any recommendations as far as hardware? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 8-15 TB storage: any recommendations?
On Wed, Jan 6, 2010 at 4:38 PM, Joseph L. Casale jcas...@activenetwerx.com wrote: recommendations as far as hardware? Giving we have no clue what it is used for no:) Seriously, it makes all the difference what this is backing, vm's exported over nfs/iSCSI, samba, etc... ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Joseph, this is a good point, thanks. Primarily we are talking NFS/SSH/SFTP. Also possibly Samba, CIFS. Like I said, a storage platform, nothing fancy. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 8-15 TB storage: any recommendations?
On Wed, Jan 6, 2010 at 4:40 PM, Max Hetrick maxhetr...@verizon.net wrote: Boris Epstein wrote: This is not directly related to CentOS but still: we are trying to set up some storage servers to run under Linux - most likely CentOS. The storage volume would be in the range specified: 8-15 TB. Any recommendations as far as hardware? Why not just get a SAN appliance, and then attach it to your CentOS server with iSCSI. My company is getting ready to do the same. We have the hardware in place, just haven't had time to hook it all up and spin the thing up. We purchased an IBM SAN, and then we'll attach it to an older xSeries 235 server running CentOS. Or are you looking for some cheaper solutions? Regards, Max ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Max, Roughly how much space does the appliance provide? And how much did it cost? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] /dev/video* permissions
Hi all, Does anybody know where those permissions are controlled? I've looked in /etc/udev and everywhere else I could think of and thus far I have seen not a hint... Thanks in advance for all your help. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] port forwarding using iptables
Hi listmates, Happy Thanksgiving! Does anybody know if there is a convenient utility to configure iptables on a CentOS 5.4 or 5.3 machine to do port forwarding? And if not, where and how does one put the requisite commands? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] info about hdds in raid
On Mon, Nov 2, 2009 at 7:02 PM, Les Mikesell lesmikes...@gmail.com wrote: John R Pierce wrote: Les Mikesell wrote: If you can see activity lights, you can 'cat /dev/sd? /dev/null' to make them busy, one at a time (where ? is a, b, c, etc). hahaha, I've done that, only my version is... # dd if=/dev/sdX of=/dev/null bs=512 but, same difference It's unfortunately about the best we've got when device names are assigned more or less randomly. NICs are even worse - we need a command to make the lights blink there too. -- Les mikes...@gmail.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Fully second that. The dd read test is the best way to tell which drive is starting to fail. As soon as one does it is not a bad idea to replace it. Note that sometimes SMART drive and such technologies fail to detect missing sectors even when the dd test stumples upon them. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] CentOS 5.4: yum-priorities seems to be MIA
Hi all, I just installed 5.4 on a machine here... All seems running fine, except I decided to put on the extra repositories - and as usual I decided to install yum-priorities (as directed here: http://wiki.centos.org/AdditionalResources/Repositories/RPMForge ) but it seems like this package is nowhere to be found. Does anybody know why this would be? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.4: yum-priorities seems to be MIA
On Thu, Oct 29, 2009 at 4:07 PM, Akemi Yagi amy...@gmail.com wrote: On Thu, Oct 29, 2009 at 1:00 PM, Boris Epstein borepst...@gmail.com wrote: Hi all, I just installed 5.4 on a machine here... All seems running fine, except I decided to put on the extra repositories - and as usual I decided to install yum-priorities (as directed here: http://wiki.centos.org/AdditionalResources/Repositories/RPMForge ) but it seems like this package is nowhere to be found. Does anybody know why this would be? It is a known issue: http://bugs.centos.org/view.php?id=3923 Akemi ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Thanks... Hopefully that will be sorted out soon then. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] full-fledge PDF editor for Linux
Hi all, Does anybody know of an editor that can do on Linux what Acrobat / Acrobat Pro can do on Mac/Windows? I have tried to use the PDF Import extension to the Open Office which appears barely functional - at least it is so slow as to be almost impractical. I have also tried pdfedit under Linux which seems to work fine but seems to have rather limited functionality. For instance, the capability to make bookmarks or to search through the whole document (as opposed to the current page) seems to be missing there. Any tips much appreciated. Cheers, Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] full-fledge PDF editor for Linux
On Tue, Oct 20, 2009 at 10:36 AM, Boris Epstein borepst...@gmail.com wrote: Hi all, Does anybody know of an editor that can do on Linux what Acrobat / Acrobat Pro can do on Mac/Windows? I have tried to use the PDF Import extension to the Open Office which appears barely functional - at least it is so slow as to be almost impractical. I have also tried pdfedit under Linux which seems to work fine but seems to have rather limited functionality. For instance, the capability to make bookmarks or to search through the whole document (as opposed to the current page) seems to be missing there. Any tips much appreciated. Cheers, Boris. Hi again, Just to update you on the situation: the best solution I have found thus far is a commercial but cheap one named PDFStudio ( http://www.qoppa.com/psindex.html ). Prices are under US $100. Seems to be doing all we need (much like the Adobe Acrobat Pro ). Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] tar and gunzip help
On Fri, Aug 21, 2009 at 3:16 PM, ML mailingli...@mailnewsrss.com wrote: HI All, I have a directory tree that when the user un-gzips/untars it does into /opt by default. The directory tree is like: ugui | |-- misc files |-- source |-framework |-- misc files so when unzipped I want to end it with /opt/ugui and all the stuff below it. How do I do this? Can I also issue one command that will unzip and untar the archive at the same time? (I know I can, I just cant get it right) Thanks! -ML ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Do you mean to say that the filenames within the tar archive(s) are hard-coded all the way from / down? Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Greasemonkey question
Hello all, Sorry about going a bit off-topic (the question is not really Linux-related) but here it goes nonetheless: 1) How does one create a webpage with a Greasemonkey script that is installable? 2) Why does it happen that a Firefox installation in a user's account (i.e., the configuration which amongst other things contains Greasemonkey scripts) would all of a sudden lose them? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Greasemonkey question
On Mon, Aug 10, 2009 at 11:54 AM, Brian Mathisbrian.mat...@gmail.com wrote: I think this is FAR off-topic. So far that Google would be a much better place to ask, or maybe the greasemonkey site. On Mon, Aug 10, 2009 at 11:38 AM, Boris Epsteinborepst...@gmail.com wrote: Hello all, Sorry about going a bit off-topic (the question is not really Linux-related) but here it goes nonetheless: 1) How does one create a webpage with a Greasemonkey script that is installable? 2) Why does it happen that a Firefox installation in a user's account (i.e., the configuration which amongst other things contains Greasemonkey scripts) would all of a sudden lose them? Thanks. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I have asked Google and thus far nothing came back that looks even remotely promising... Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Apache not liking directories outside of /var/www
Hi all, It appears that on my nice little CentOS 5.3 machines Apache only allows me to store content in directories which are under /var/www/ For instance, putting content in /var/www/test and defining the following alias: Alias /test /var/www/test then accessing it under http://hostname/test works great. Not copy that same content to /home/test, change the alias to: Alias /test /home/test and you get Error 403. Any idea why that would be? Never had this sort of trouble anywhere, including under CentOS 5.0 and 5.1 Thanks in advance for any and all help. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Apache not liking directories outside of /var/www
On Fri, Jul 31, 2009 at 12:24 PM, Filipe Brandenburger filbran...@gmail.com wrote: Hi, On Fri, Jul 31, 2009 at 12:17, Boris Epsteinborepst...@gmail.com wrote: Any idea why that would be? It's SELinux. Files exported by Apache must have context httpd_sys_content_t. You can use ls -Z to see the context of a certain file. You can use chcon -R httpd_sys_content_t /home/test to change the context of all the files in the /home/test directory, however that will not apply to new files created under that directory, in which case you have to add new rules using semanage fcontext (see the examples man semanage for help on how to do that). In general I would advise you to try to adapt your application so that the files that need to be seen by Apache are under /var/www, if you have that flexibility it will be simpler and have less chance of breaking in the future. HTH, Filipe ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I found an even simplier solution - disabled SELinux. I've got a firewall and that is plenty. Thanks a lot, Filipe! ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Apache not liking directories outside of /var/www
On Fri, Jul 31, 2009 at 12:50 PM, Jim Perrinjper...@gmail.com wrote: On Fri, Jul 31, 2009 at 12:35 PM, Boris Epsteinborepst...@gmail.com wrote: I found an even simplier solution - disabled SELinux. I've got a firewall and that is plenty. No. It's really not. If someone exploits apache, or php, they'll be coming in via port 80 or 443 which your firewall has helpfully allowed so that you can run your server. The vast majority of successful penetrations I've seen are of two types. Brute ssh attacks, and apache/php exloits. If you were running mod_security, that might be slightly more analogous to selinux. I really don't recommend that people disable selinux simply because they can't be bothered to learn it. Real world reasons for selinux on web servers - http://www.linuxjournal.com/article/9176 -- During times of universal deceit, telling the truth becomes a revolutionary act. George Orwell ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I am running mod_security and also if the intruder gets to the shell level they will be able to bypass the SELinux entirely. I believe in security too but security should not be crippling. Boris. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
