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Good tool to draw server room?
by Rafał Radecki 03 Jul '12

03 Jul '12

Hi all. I am currently designing a server room. I would like to be able to draw a 2D (in the future 3D) project. Do you know any tools? Which one can you recommend? Best regards, Rafal Radecki.

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Question about storage for virtualisation
by Nicolas Ross 03 Jul '12

03 Jul '12

Hi ! I'm about to deploy a new server that will host several virtual host for mainly website hosting purposes. My server will be a Xeon 3440 or 3450 with 32 gigs of ram (the max of that board). So I will have 8 logical cores. At the moment, I don't know how many vms I will have, in the order of 5 or 6. I am quite new to managing VMs, I did play alot with them over the course of the last couple of weeks. I used kvm to startup and manage my vms and my main source of info was this blog entry : http://blog.mattbrock.co.uk/2012/02/12/virtualisation-with-kvm-and-lvm-on-c… I have some general questions about VM. If I set vcpu let's say to 2-3 for a single vm, does this mean that those CPU are dedicated to that vm or many vm can share the same physicial cpus ? So, I was wondering what's the best for managing storage for VMs ? I see mostly recomandations for LV for storing VM's disks. It seem to helps to create snapshots for backup purposes. Is this the fastest way of creating backups ? And will data access be faster that if I use regular files ? In my case, the "main" setup of each vm is rather simple. The minimal OS, updates, my own httpd, my own php a couple of other packages. So restoring a VM from scratch can take less than an hour. So I was thinking of not taking snapshot of the whole VM and only sync the data partition. As for the guest paritions, I am accustomed of separating my servers disks with separate /, /usr, /var, /home and /data partitions. I can't recall today why I started doing this, 15 years ago, but I still like it that way and continue to do so. Do I still "need" to do this with VMs ? Thanks for the help !

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CentOS-announce Digest, Vol 89, Issue 1
by centos-announce-request＠centos.org 03 Jul '12

03 Jul '12

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2012:1054 Important CentOS 5 libtiff Update (Johnny Hughes) 2. CEBA-2012:1055 CentOS 5 cpio FASTTRACK Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 3 Jul 2012 13:30:55 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2012:1054 Important CentOS 5 libtiff Update To: centos-announce(a)centos.org Message-ID: <20120703133055.GA14830(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2012:1054 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2012-1054.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: dd04056bafee28ad90068e16e495c9a1a630c8082d9ee92aba0b300cacdddf0a libtiff-3.8.2-15.el5_8.i386.rpm ae3a8aa408fe69b382fe3a1714ffc271cbe071e456c96236e3ad15916563d328 libtiff-devel-3.8.2-15.el5_8.i386.rpm x86_64: dd04056bafee28ad90068e16e495c9a1a630c8082d9ee92aba0b300cacdddf0a libtiff-3.8.2-15.el5_8.i386.rpm ca333eb77257c40b2658db55eba842bf5a8061ae703e7778a9f403a73e1720cd libtiff-3.8.2-15.el5_8.x86_64.rpm ae3a8aa408fe69b382fe3a1714ffc271cbe071e456c96236e3ad15916563d328 libtiff-devel-3.8.2-15.el5_8.i386.rpm af9b3742ed04ad310387bd77c16c37c6295946a5bfbd7f186b40964d202f1210 libtiff-devel-3.8.2-15.el5_8.x86_64.rpm Source: ee21fb09862a07efe0077ee5973f2933fcb6e03216775a45976ce630925d9885 libtiff-3.8.2-15.el5_8.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Tue, 3 Jul 2012 13:33:14 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:1055 CentOS 5 cpio FASTTRACK Update To: centos-announce(a)centos.org Message-ID: <20120703133314.GA14961(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:1055 Upstream details at : http://rhn.redhat.com/errata/RHBA-2012-1055.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: e1cc8f47bc8fb18fb03e4c64266c8c36601ececc0ec8d64f485f98f9eec88521 cpio-2.6-25.el5.i386.rpm x86_64: 646a675919be39abe8d7c1bcf37714ef50b646448b940731cdf65feb166194dc cpio-2.6-25.el5.x86_64.rpm Source: 76262229ac21e3e0fcc5aad835e3be660b977ba7382efd08ecdcb2736a2e628f cpio-2.6-25.el5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 89, Issue 1 **********************************************

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Re occurring LTO5 hw issue
by aurfalien 03 Jul '12

03 Jul '12

Hi all, We have 2 LTO5 drives in a Quantum Scalar i500. Within a years time, we have gone through 4 drives total and luckily we are on support. We catch the problem by doing 2 verifies on the archives; a full virtual restore were the entire tape(s) are read and then a real selective restore were we test the restored data. We have 650TB on tapes within a years time. Any one have similar experiences with LTO5 drives? My data room may be a little dusty but nothing to sneeze at :) - aurf

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Re: [CentOS] leap second
by J.Witvliet＠mindef.nl 03 Jul '12

03 Jul '12

-----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Stephen Harris Sent: Monday, July 02, 2012 6:24 PM To: CentOS mailing list Subject: Re: [CentOS] leap second On Mon, Jul 02, 2012 at 11:09:41AM -0500, Les Mikesell wrote: > I'm sort of curious about how a bug of this magnitude slips through > the QA process (into java and RHEL, not CentOS). With all the furor > about y2k, did no one even bother to simulate a leap second ahead of > the real occurrence? The kernel bug is a race condition; simulations may not have detected it. -----Original Message----- Very well, but this isn't the first leap second-insertion (2005, 2009), and certainly not the last. I never heard of such consequences before. Hans ______________________________________________________________________ Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u niet de geadresseerde bent of dit bericht abusievelijk aan u is toegezonden, wordt u verzocht dat aan de afzender te melden en het bericht te verwijderen. De Staat aanvaardt geen aansprakelijkheid voor schade, van welke aard ook, die verband houdt met risico's verbonden aan het elektronisch verzenden van berichten. This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. The State accepts no liability for damage of any kind resulting from the risks inherent in the electronic transmission of messages.

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A parted issue
by m.roth＠5-cent.us 30 Jun '12

30 Jun '12

We just got in a few server-class drives. They're Seagate Constellations, 3TB. I went to partition and format, and did a mklabel gpt in parted. Ooops. It claims Sector size (logical/physical): 512B/512B After data sheet that doesn't tell me, and a long wait*, I spoke to a Seagate tech, who agreed that it *is* 4k physical. This is CentOS 6.2 Anyone know any way to correct this, or if it's a problem if I manually align the partition to sector 64, or 1M? mark * Seagate "live chat" announced that it doesn't support my browser (firefox!!!), only IE, Safari, and chrome. I told the tech of my complaint and surprise to his manager.....

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Universal server hardware platform - which to choose?
by Rafał Radecki 29 Jun '12

29 Jun '12

Hi all. I am working for a hosting provider in Poland. We are currently searching for an universal, extensible hardware platform which we would like to use in our server infrastructure. The platform should have: - possibility to install up to 32GB of RAM and at least 4 slots for it; - at least 6 SATA ports; - the possibility to use SAS disks; - at least one 1Gb/s network interface and the possibility to add another one; - size of 2 or 3U; - hot swap for disks. We are looking for a solution in which we would be able to deploy a basic server with for example 2 SATA disks, 8GB of RAM, 1 NIC, 4 cors and to be able to use the same enclosure and motherboard and extend it to deploy a more heavy-duty server with for example 6 SATA disks, 24GB of RAM, 2 NICs, 8 cors. Which manufacturer can you recommend and why? We are looking for something rather not expensive but reliable which has a good support. All servers will be based on CentOS5/6 :) Best regards, Rafal Radecki.

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How to handel smtp to public servers
by Götz Reinicke 28 Jun '12

28 Jun '12

Hi, we do have some subnetworks for private computers, which are allowed to use there public smtp servers like msn, web.de or whatever with the users private accounts. All our own computers have to send mail trough our mailserver with user authentication. From time to time we are faced with the fact, that a virus infected private notebook sends spam and we are told by our ISP to take care :) What might be a good choice to allow clients to send unrestricted transparent mails (= use smtp(s)) but we can monitor? E.g. like a redirect or proxy for smtp? I like to know which private computer sends lot of mail. :) Thanks for any hint and suggestion. /Götz -- Götz Reinicke IT-Koordinator Tel. +49 7141 969 82 420 Fax +49 7141 969 55 420 E-Mail goetz.reinicke(a)filmakademie.de Filmakademie Baden-Württemberg GmbH Akademiehof 10 71638 Ludwigsburg www.filmakademie.de Eintragung Amtsgericht Stuttgart HRB 205016 Vorsitzender des Aufsichtsrats: Jürgen Walter MdL Staatssekretär im Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg Geschäftsführer: Prof. Thomas Schadt

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Optimizing grep, sort, uniq for speed
by Sean Carolan 28 Jun '12

28 Jun '12

This snippet of code pulls an array of hostnames from some log files. It has to parse around 3GB of log files, so I'm keen on making it as efficient as possible. Can you think of any way to optimize this to run faster? HOSTS=() for host in $(grep -h -o "[-\.0-9a-z][-\.0-9a-z]*.com" ${TMPDIR}/* | sort | uniq); do HOSTS+=("$host") done

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Re: [CentOS] Optimizing grep, sort, uniq for speed
by m.roth＠5-cent.us 28 Jun '12

28 Jun '12

Woodchuck wrote: > On Thu, Jun 28, 2012 at 01:30:33PM -0500, Sean Carolan wrote: >> This snippet of code pulls an array of hostnames from some log files. >> It has to parse around 3GB of log files, so I'm keen on making it as >> efficient as possible. Can you think of any way to optimize this to >> run faster? > > If the key phrase is *as efficient as possible*, then I would say > you want a compiled pattern search. Lex is the tool for this, and That, to me, would be a Big Deal. <snip> > BTW, you could easily incorporate a sorting function in lex that > would eliminate the need for an external sort. This might be done in awk, > too, but in lex it would be more natural. You simply would not <snip> Hello, mark, wake up. Of course, there's an even easier way, just using awk: awk '{if (/[-\.0-9a-z][-\.0-9a-z]*.com/) { hostarray[$9] = 1;}} END { for (i in hostarray ) { print i;}}' This dumps it into an associative array - that's one whose indices are a string - so it will by default be in order. mark

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