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JOB: Permanent Database Architect (MySQL preferable) in Reading, Berkshire
by jt＠camalyn.org 25 Feb '09

25 Feb '09

JOB: hi List, My name is James and I'm an open source recruiter currently working with a client in Reading (Berkshire, UK) who are looking to recruit a database architect (experience with MySQL is not necessarily what the client are looking for, although the database architect should certainly be familiar with MySQL. What’s more important is that the DBA should have experience designing large, replicated, globally distributed databases built for performance). The DB Architect will work closely with the development and operations teams - both of which are growing parts of the clients overall business. Whilst the developers have had some involvement with capacity planning and performance monitoring of the live system in conjunction with the Operations team this responsibility will move entirely to the database architect over time. This isn't a development role so the db architect wouldn't be taking over the writing of all SQL or anything (which would be impractical in any case) but they would be expected to use their expertise in advising the developers how best to tune their code. Stored procedures are not currently used but they will probably look at it in the future and this again would be something that the architect would certainly get involved in as well as requirement to revisit existing SQL with a view to perhaps rewrite and/ or optimise. They are running a mixture of MySQL 4.1 and 5.0. They don't run enterprise as they always aim to employ talented staff so they can support everything as far as possible in house. This goes for the OS as well, which is why they use CentOS and not RHEL. Although as part of the role's remit will be to find new opportunities to exploit new features or better use existing ones there are no immediate plans to upgrade to 5.1 as they are quite happy for early adopters to find and fix the bugs before they make any decision on it. Currently there are no specific bottlenecks or db problems as such, the focus is changing in such a way that they need to be able to store more data and consequently they need to have the architect in place. However, although there are no specific issues, there is also a focus on continual improvement of what they have. As with all IT systems, there is always something that can be optimised. Identifying potential future bottlenecks and avoiding them is also part of the role. In terms of the number of high transactional servers - which would be the definite focus - we are looking at high 30s. They do use MySQL replication but not clustering at this time. If anybody is interested in discussing this role with me further (including salary) please contact me off list using james(a)camalyn.org Please understand that I did also send an email requesting permission to send this e-mail to the Centos list owners - but have had no reply or acknowledgement. All the best, JAMES >> to learn more about Camalyn please visit http://www.camalyn.org

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Re: [CentOS] Social Security Changes
by Ralph Angenendt 25 Feb '09

25 Feb '09

Sorin Srbu wrote: > I don't get it... Is the petition CentOS-related?? Ermm, no? Ralph

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Checking for changes
by Joseph L. Casale 25 Feb '09

25 Feb '09

Is there anything I can use to take an inventory of the filesystem before and after some process to see what's changed? Thanks! jlc

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Social Security Changes
by Mark Weaver 25 Feb '09

25 Feb '09

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Thunderbird and Firefox
by Rob Kampen 24 Feb '09

24 Feb '09

I have two CentOS plus x86_64 workstations that as far as possible I am trying to keep the same. One for home, one for my office. I have the 32 bit Firefox installed along with a number of plugins and have just found that firefox no longer plays any shockwave content on my work machine, I have tried disabling the various quicktime, mplayer, realplayer plugins but still no go. Removed firefox and re-installed (via yumex) still no go........ Any other things I can do? Then on my home machine I have lost the ability to click on a http:// link within Thunderbird and have it open the link in Firefox. This works fine on the office machine. It is annoying to have to copy and paste the link to get it to work. I have other CentOS machines (x86) where all this works just fine...... Any pointers to get me heading in the right direction? thanks Rob

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RHSA-2009:0264-9 Kernel Security Update
by Mark Adams 24 Feb '09

24 Feb '09

Does this RHEL 5 security update not apply to CentOS 5? I've been waiting for a new kernel to be released by the CentOS team, but it's apparently not coming? - Mark A.

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Is the NFS lockd bug fixed ?
by Alain Terriault 24 Feb '09

24 Feb '09

Hi, I notice other users reporting problems with NFS lockd and was under the impression the problem was solve with "kernel-2.6.18-92.1.13.el5". I am runing x86_64 versions of "kernel-2.6.18-92.1.22.el5.centos.plus" ( i need XFS) on my nfs server and "kernel 2.6.18-92.1.22.el5" on my clients. I constantly get this error "lockd: server 192.168.10.2 not responding, timed out" Does the most recent "centos_x64" kernel has the lockd patch ? maybe my problem is elsewhere, I never had problem with NFS before .. thanks, alain

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Samba Permissions - Sanity check
by Tim Nelson 24 Feb '09

24 Feb '09

Greetings list- I have a Samba-centric question to ask. I have a particular user who claims Samba has the ability to allow users to create/edit/modify existing files of a share but NOT delete them. To my knowledge, the aforementioned permissions require the user to have write access to the share which *ALSO* gives them the ability to delete files as well. The Samba server is nothing special, simply the latest Samba running on CentOS 5, ext3 filesystem. I've been around and around on this topic and I'm just hoping someone can give me a little sanity by confirming 'yay or nay' whether this is possible or not. --Tim

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why no /dev/loop0 in install chroot system?
by Isaac Hailperin 24 Feb '09

24 Feb '09

Hi, just out of curiosity: Within a kickstart postinstall script, I tried to do a loop mount, which failed. It turns out that there is no /dev/loop0 (no /dev/loop<x>). After creating it with mknod /dev/loop0 b 7 0 everything works fine. Now this script executes in the chroot system. This is the system on the hd. A plain chroot system should not have any /dev or /proc mounted. But actually, it does: + cat /proc/mounts rootfs / rootfs rw 0 0 /proc /proc proc rw 0 0 /dev /dev tmpfs rw 0 0 /dev/pts /dev/pts devpts rw 0 0 /sys /sys sysfs rw 0 0 none /tmp ramfs rw 0 0 none /tmp/ramfs ramfs rw 0 0 /proc/bus/usb /proc/bus/usb usbfs rw 0 0 /tmp/loop0 /mnt/runtime squashfs ro 0 0 /tmp/sda1 / ext3 rw,data=ordered 0 0 /tmp/sda3 /home ext3 rw,data=ordered 0 0 /tmp/sys /sys sysfs rw 0 0 /tmp/proc /proc proc rw 0 0 /dev /dev tmpfs rw 0 0 So I assume that centos kindly does a bind mount of these pseudofilesystems (?) from the install system for me, so that the chroot system is a fully functional system. (Is that true?). If that is so, why is there no /dev/loop0? Isaac

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[CLUSTER] Bugfix in cman for Centos 5.2
by Marc Grimme 24 Feb '09

24 Feb '09

Hello * For anybody who is interested. There is a "critical" bug in cman (2.0.84) CentOS 5.2 provides. This is already known and fixed. The bug can be found here: https://bugzilla.redhat.com/show_bug.cgi?id=485026 I backported the fix to the current CentOS version (2.0.84). Those can be downloaded here: http://download.atix.de/yum/comoonics/testrpms/cman-2.0.84-2.4.i386.rpm http://download.atix.de/yum/comoonics/testrpms/cman-2.0.84-2.4.x86_64.rpm http://download.atix.de/yum/comoonics/testrpms/cman-devel-2.0.84-2.4.i386.r… http://download.atix.de/yum/comoonics/testrpms/cman-devel-2.0.84-2.4.x86_64… http://download.atix.de/yum/comoonics/testrpms/cman-2.0.84-2.4.src.rpm They are neither signed nor verified and I don't want to responsible for any harm they cause. But for my tests they worked perfectly well. ;-) Use them at your own risc. Regards Marc. -- Gruss / Regards, Marc Grimme http://www.atix.de/ http://www.open-sharedroot.org/

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