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CentOS-5 PostgreSQL 8.1.9
by James B. Byrne 03 Jan '08

03 Jan '08

I have installed pgadmin3 from Dags repository. I now wish to enable postgresql server instrumentation and my research indicates that I need to install postgres-contrib (done) and then run the admin81.sql script. I cannot find said script and yum whatprovides admin.sql or admin81.sql does not find anything. How do I enable server instrumentationt for my CentOS-5 installation? Regards, -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@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 3C3

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MyhtTV or Freevo or something else?
by Mindaugas 03 Jan '08

03 Jan '08

Hello, I have the idea brewing for some time in my mind - to build Linux based HTPC. It would be used for movies, cable (analog for now) recording, Stepmania, backup station, etc. And I would like to get some information before proceeding to estimate the cost. Which one of the Linux projects would you suggest and why? MythTV, Freevo or something else? Is CentOS good for such task or I should better use some more bleeding edge distribution like Fedora? Also what are hardware requirements? I believe HD 1080p h264 movie playback will set the bar. Which Intel or AMD CPU is enough (but not too expensive) for that? And which video card is more suitable for such task. HTPC would be connected to Panasonic LCD TV with VGA and HDMI inputs. Thanks, Mindaugas

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OT: How many watts do I need?
by Fajar Priyanto 03 Jan '08

03 Jan '08

Hello all, Sorry for the OT thing. I'm helping a friend setting up a new box. It's a Pentium 4 with 430Watt power supply. He wants to plugin his old harddrives and DVD into the new box. The total will be: 3 harddrives, 1 DVD drive, 1 CDRW drive. In the box there are also 2 big fans. Is 430Watt enough? Thank you for your sharing. -- Fajar Priyanto | Reg'd Linux User #327841 | Linux tutorial http://linux2.arinet.org 07:37:56 up 15 min, 2.6.22-14-generic GNU/Linux Let's use OpenOffice. http://www.openoffice.org The real challenge of teaching is getting your students motivated to learn.

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[Semi-OT] Advice on large webmail setup
by Neil Thompson 03 Jan '08

03 Jan '08

Hi all, As the resident Linux guru, I've just been tasked with costing a webmail setup for about 600 000 users. They each have 10MiB (small, I know) mailboxes. The current setup has about 40 million web page accesses per month. Has anyone here any experience with this kind of thing? If so, any pointers as to software and hardware used, and any other advice would be appreciated. TIA -- Cheers! (Relax...have a homebrew) Neil THEOREM: VI is perfect. PROOF: VI in roman numerals is 6. The natural numbers < 6 which divide 6 are 1, 2, and 3. 1+2+3 = 6. So 6 is a perfect number. Therefore, VI is perfect. QED -- Arthur Tateishi

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Re: [CentOS] Xen, GFS, GNBD and DRBD?
by Ross S. W. Walker 03 Jan '08

03 Jan '08

You can fail-over using iSCSI multi-pathing. Have the initiator log in to both targets and then setup dm-multipath to do fail-over. On the target side you could use drbd with multi primaries and there you have it, redundant storage with easy fail-over. -Ross -----Original Message----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: CentOS mailing list <centos(a)centos.org> Sent: Wed Jan 02 20:15:58 2008 Subject: Re: [CentOS] Xen, GFS, GNBD and DRBD? On 03/01/2008, at 9:55 AM, Ross S. W. Walker wrote: > > Take a look at iSCSI for the storage servers. iSCSI Enterprise > Target is what I use here and it works well for us. > > You don't really need shared filesystems if you are doing direct > block io to LVs or raw partitions as the Xen migration will handle > the hand-off, but you will if you are using flat files, because of > this I recommend using LVs or raw partitions as clustered > filesystems will put a serious overhead on the Xen guest io. > > -Ross Ross, I can use DRBD to mirror data between the two storage servers and iSCSI to export the block devices, but how will iSCSI cope with failure of one storage server? Can I use heartbeat and CRM to failover the host IP and iSCSI target to the other storage server? Regards, Tom _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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The ticket clinic, What Is U.S. Copyright Law?
by Blogger Man 03 Jan '08

03 Jan '08

The ticket clinic, What Is U.S. Copyright Law? The US Copyright Law grants rights to individuals for the works they create. The US Copyright Act of 1790 has changed over the years. The current basis of US copyright law is based on the Copyright Act of 1976. US copyright law is relatively automatic. Once someone has an idea and produces it in tangible form, the creator is the copyright holder and has the authority to enforce his exclusivity to it. In other words, the person is the owner of the creation. It is not necessary that a person register their work. However, it is recommended and it can serve as evidence if someone ever violates a copyright. It is interesting to note that when an employer hires an employee to produce a work that the copyright is given to the employer. Violations of US Copyright Law are generally enforced in a civil court setting. However, there could also be criminal sanctions brought against someone who violates US copyright law. Someone in serious violation of US Copyright Law, such as counterfeiting, can find themselves on the inside of prison looking out. People need to understand the copyright symbol is not a requirement. Someone may have a copyright, yet their work may not have a copyright notice or symbol. US Copyright Law covers a wide range of things that are derived from artistic expression, intellectual or creative work. This includes things such as literary works, music, drawings, photographs, software, movies, choreographic works such as ballets and plays, poems, paintings and more. The law covers the form of expression, not the concept, facts or the actual idea of the work. This means that someone can use another person?s idea or concept and produce their own take on it. However, copying another person?s work is a violation. some things may not be copyrighted but they may be protected by a patent or trademark. Individuals who have a copyright on a particular piece of work can do with it what they will. They may choose to copy it and sell it. They may display their work or perform it in public and charge admission, or they can assign or sell the work to someone else. Individuals who have a copyright can also choose to do nothing with their work, if that is their desire. However, if someone comes along and takes the work and tries to use it in some way, that person is still in violation of the owner?s copyright. Copyrights cover published and unpublished work. Anyone who is in the creative arts arena should be very careful that they do not violate US Copyright Law. For that matter, anyone who is a fan of the creative arts should make sure they are not in violation of a copyright. Simple things like uploading, downloading and sharing music or movie files can result in serious charges and fines being brought against them. The popularity of the Internet and file sharing software has increased copyright violations. Copyright owners are starting to take a stand against copyright violators and are hunting down the perpetrators. Be careful you are not overstepping your boundaries and violating someone?s copyright law. ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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The iostat command
by Indunil Jayasooriya 03 Jan '08

03 Jan '08

Hi All, I am learning iostat command to understand disk I/O statistics. We have 2 Centos 4 servers running where oracle is installed.We installed them 2 weeks ago. @ that time, These Servers performed well. But, Now We have come to know that these 2 Machines are quite slow when comparing to the first week. So, Some say, run iostat to see statictics. I am not familiar with comamnd well. I found below url http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/admin-guide/s1-… And, I have still not understood it fully. Could you pls advice me , If you have experience with iostat? In adition to that, What are the other tools I can use? I have already used, top , vmstat commands Hope to hear from you. -- Thank you Indunil Jayasooriya

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Java applets plugins for Mozilla Firefox
by Andrew Allen 03 Jan '08

03 Jan '08

I'm trying to view some websites which require Java applets to be installed in the web browser - how do I install these please as I haven't found a simple/obvious way to do it with yum? Thanks, Andy

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Xen, GFS, GNBD and DRBD?
by Tom Lanyon 03 Jan '08

03 Jan '08

Hi all, We're looking at deploying a small Xen cluster to run some of our smaller applications. I'm curious to get the lists opinions and advice on what's needed. The plan at the moment is to have two or three servers running as the Xen dom0 hosts and two servers running as storage servers. As we're trying to do this on a small scale, there is no means to hook the system into our SAN, so the storage servers do not have a shared storage subsystem. Is it possible to run DRBD on the two storage servers and then export the block devices over the network to the xen hosts? Ideally the goal is to have the effect of shared storage on the xen hosts so that domains can be migrated between them in case one server needs to go offline. Do I run GFS on top of the DRBD mirrored device, exported via GNBD to the xen hosts; or the other way around, using GNBD to export the DRBD mirrored device and then GFS running on the xen hosts? Is this possible; is there an easier/simpler/better way to do it? Thanks, Tom

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Re: [CentOS] Xen, GFS, GNBD and DRBD?
by Ross S. W. Walker 03 Jan '08

03 Jan '08

Take a look at iSCSI for the storage servers. iSCSI Enterprise Target is what I use here and it works well for us. You don't really need shared filesystems if you are doing direct block io to LVs or raw partitions as the Xen migration will handle the hand-off, but you will if you are using flat files, because of this I recommend using LVs or raw partitions as clustered filesystems will put a serious overhead on the Xen guest io. -Ross -----Original Message----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: CentOS mailing list <centos(a)centos.org> Sent: Wed Jan 02 17:44:19 2008 Subject: [CentOS] Xen, GFS, GNBD and DRBD? Hi all, We're looking at deploying a small Xen cluster to run some of our smaller applications. I'm curious to get the lists opinions and advice on what's needed. The plan at the moment is to have two or three servers running as the Xen dom0 hosts and two servers running as storage servers. As we're trying to do this on a small scale, there is no means to hook the system into our SAN, so the storage servers do not have a shared storage subsystem. Is it possible to run DRBD on the two storage servers and then export the block devices over the network to the xen hosts? Ideally the goal is to have the effect of shared storage on the xen hosts so that domains can be migrated between them in case one server needs to go offline. Do I run GFS on top of the DRBD mirrored device, exported via GNBD to the xen hosts; or the other way around, using GNBD to export the DRBD mirrored device and then GFS running on the xen hosts? Is this possible; is there an easier/simpler/better way to do it? Thanks, Tom _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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