Web Hosting :: CentOS 5x But 32bit Or 64bit

Choosing 32bit Versus 64bit OS
I'm in the process of preparing to install CentOS 5 on my server, and was wondering whether most people recommend going with the 64bit version or sticking with 32bit. My server's CPU is 64-bit capable (Xeon 3060 at SoftLayer), and I have previously run CentOS 4.4 64bit on it, though I did have some struggles from time to time getting things to work (following setup guides that tend to assume 32bit more often than not).

I'll be running just a standard setup of PHP 5, MySQL 5, and Apache 2, powering several moderate-traffic sites that run on the Drupal CMS (e.g. about 7000-10000 visitors per day total, though hopefully more in the future of course). I don't plan on running a control panel other than Webmin, though I might get DirectAdmin or similar in the future to make hosting some friends/clients a bit simpler.

Will going with 64bit offer any worthwhile advantage with this setup?

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64bit Guest Os On 32bit Host
I was surprised when hypervm brought in a 64bit guest os. Maybe it's me..but...is this a good idea? Maybe it works fine.. it just does not *seem* like it would.

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RHEL 5 - 32bit V 64bit Running Cpanel 11 For Hosting
As cPanel is an integral part of server hosting and has the ability of compiling Apache 1.3.x with PHP4 (cgi) and PHP5 (dso) on your server OS.

Does anyone know or have baselines/benchmarks for which performs better generally for hosting: 32bit or 64bit RedHat 5 when cPanel 11 has compiled for the Apache and php mentioned above on either of these OS editions? (assume latest versions of apache/php4/5)

I was wondering if 32bit performed better or 64bit on a quad core Xeon. Don't forget PHP is compiled for prefork and not multi-threading for Apache 1.3.41 (which are considered legacy 32bit forked apps compiled against 64bit OS).

Or rephrased, could i be hampering performance by running it on a 64bit OS on a Xeon (X3210) or improving performance? I'd assume 64bit would offer better all round processing power, or is this a misconception.

I recently decided to get a server on RedHat Enterprise 5 X86_64 (64bit), when i wondered if 32bit version would have provided better performance and been the better options for compatibility.

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Kernel-PAE And CentOS 5 32bit
I have a dedicated box with following specs
Core2Quad 2.4ghz
2x500gb hdd
8gb ram

I installed 32bit centos5 in it ( because I use lxadmin ;lxadmin wont support 64bit)
Installed kernel-PAE successfully and rebooted the server. but the server still boots into the old kernel. I need the kernel-PAE to be booted, then only I can utilize full RAM. help me . below there is ssh logs
[root@t241 ~]# cat /proc/meminfo
MemTotal: 3357036 kB
MemFree: 3204984 kB
Buffers: 8148 kB
Cached: 109516 kB
SwapCached: 0 kB
Active: 33504 kB
Inactive: 103664 kB
HighTotal: 2477180 kB
HighFree: 2343972 kB
LowTotal: 879856 kB
LowFree: 861012 kB
SwapTotal: 6409892 kB
SwapFree: 6409892 kB
Dirty: 16 kB
Writeback: 0 kB
AnonPages: 19524 kB
Mapped: 7608 kB
Slab: 7732 kB
SReclaimable: 3964 kB
SUnreclaim: 3768 kB
PageTables: 400 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 8088408 kB
Committed_AS: 45232 kB
VmallocTotal: 114680 kB
VmallocUsed: 3992 kB
VmallocChunk: 110560 kB
[root@t241 ~]# uname -rm
2.6.25.10 i686
[root@t241 ~]# cat /etc/grub.conf
default 1
timeout 7
color cyan/blue white/blue
title=CentOS (2.6.18-92.1.22.el5PAE)
root (hd0,1)
kernel /boot/vmlinuz-2.6.18-92.1.22.el5PAE root=/dev/sda2 pci=nommconf
initrd /boot/initrd-2.6.18-92.1.22.el5PAE.img
title=linux
root (hd0,1)
kernel /boot/vmlinuz root=/dev/sda2 pci=nommconf
[root@t241 ~]# rpm -qa | grep kernel
kernel-2.6.18-8.el5
kernel-PAE-2.6.18-92.1.22.el5
kernel-headers-2.6.18-8.el5
[root@t241 ~]#

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Fresh Installed Centos 5.2 (32bit) Load
Yesterday i got new Centos 5.2 server running.

For some reason, load shows 0.4-1.2.

There is no software installed on it yet, there is nothing actually running expect what came with fresh installation of that OS.

top - 16:42:22 up 2:34, 1 user, load average: 0.53, 0.75, 0.78
Tasks: 158 total, 1 running, 157 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4149456k total, 767820k used, 3381636k free, 66628k buffers
Swap: 2096472k total, 0k used, 2096472k free, 600680k cached

What should i check?

Kernel Version:
2.6.18-92.1.6.el5PAE

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Which CentOS Distribution I386 Or X86_64 For Intel Core 2 Duo 32bit Desktop
Which CentOS distribution i386 or x86_64 do I need for intel core 2 duo 32bit desktop.

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Centos 64bit Phpinfo
anyone have a cpanel server running centos 64bit or fedora ? i would appreciate a phpinfo. then you can remove it afterwards i need to debug something in 2 of my servers.

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CentOS 5 64bit VPS
Does anyone know of a VPS provider that can provide a CentOS 5 64bit OS?

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Openvz Kernel On Centos 64bit
I was Use Centos 64bit and when i install the openvz kernel and the openvzquota:

Quote:

yum -y install ovzkernel

yum -y install vzctrl vzquota vzpkg

I reebot my server and never boot up

I was planning to use a 8gb ram that's why i select 64bit.

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CentOS 5.3 (64bit) SSH Port
I have changed the SSH port in sshd config, and restarted the server and sshd, but it still runs on port 22, and my firewall says its running but its not blocking anything either. I restarted iptables, and all that still nothing...

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Clamav Compile Problem On Centos 4.3 64bit
I'm trying to install Clamav on my Centos box (64bit version) but on the Make command I get the following error:

/usr/local/lib/libz.a(gzio.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/libz.a: could not read symbols: Bad value
collect2: ld returned 1 exit status
make[2]: *** [libclamav.la] Error 1
make[2]: Leaving directory `/root/clamav-0.88/libclamav'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/clamav-0.88'
make: *** [all] Error 2

I'm guessing is something to do with X86_64 but I still can't find a solution to this.

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64bit
There's idea to move to 64bit, Current Software Specs are:-

CentOS 4.4
PHP 4.3
MySQL 5.0
Apache 2.0
No CPanel
Named
NFS

Web site mainly running on Apache, PHP, MySQL and NFS.

What do you think about stability of these softwares on 64bit processor.
Also which better AMD Opteron or Intel woodcrest ?

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32 Bit Or 64bit
32 bit or 64bit for cent Os 5.3?

I am planning to purchase 2 vps for my friends, 1 vps which I am currently in touch is providing wide range, they gave option for 32bit or 64 bit, is there going to be change in the performance of the vps based on this selection

and which is better for the future causes, this vps might have an community forum, few blogs and some file upload site,

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Is It Worth It To Go 64bit
I wonder if there is a big advantage if I would go 64bit instead of 32bit. Now I mean standard webserver + mysql. And how about compatibility isses?

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64bit Windows Vpses
Are these unheard of?

Are there any out there? Im looking at recompiling some custom server software into 64-bit ... (I am waiting on one library to be updated) .. to make use of the extra RAM allocations, and slight speed increase.

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Xen And 64bit Operating Systems
I tried installing CentOS 64bit using windows image and vnc that comes with HyperVM and it says (your cpu does not support long mode. use a 32 bit distribution), and if I try to install Windows Server 2008 I get blue screen with a stop and error.

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8GB RAM And 64bit Server
For those of you who has 8GB RAM on their servers, are you running 64bit OS on the server? How good are those 64bit OS? Are they stable?

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Imap-2004g Php5 64bit Error
/usr/bin/ld: /usr/local/imap-2004g/lib/libc-client.a(osdep.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
/usr/local/imap-2004g/lib/libc-client.a: could not read symbols: Bad value
collect2: ld returned 1 exit status
make: *** [libphp5.la] Error 1

This happens in php recompile
When trying to install under 64bit

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Vmware Server Problem With OS 64bit And Some Cpus
Many people have some problems with vmware server on some 64bit operation systems.
If your server's ram is more than 6GB, you have to have a 64bit OS but I have tried to install vmware server on a 64bit server, it seems to be crashing my vmware server every 5 min and I cant use it more until I reset this service.

CPU : Intel Xeon Nehalem 3440 2.53Ghz Quad Core w/ HyperThreading (8 virtual cores)
Ram : 4 GB DDR2
Os : CentOS 64bit

I have had an another server and i have solved this problem whit Debian. but on CentOS I usually have problem, and I cant use vmware server.

Have you any idea how i solve this problem on CentOS 64bit?

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Cpanel Installed Over Plesk On Fed4-64bit
I am pleased to report success with my first attempt of installing Cpanel on a 64bit vps running Fed4. In fact..this is the first time in known history I have tried anything this..uhhh.."risky"..and it work the very first time. Cpanel had no problems completely replacing the already pre-installed plesk.

Kudos to the Cpanel folks for that!

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Does CSF & APF Work With FreeBSD 6.2 64Bit
does CSF & APF work with FreeBSD 6.2 64-Bit?

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Difference Between CentOs 5.0 And Centos 4.5? Both With Plesk
What is the difference between CentOs 5.0 and Centos 4.5? (Both contains Plesk)

Would CentOS 5 contain more updates and fixes? CentOS 4.5 be more stable?

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32 Or 64bit & Existing Domain Net Vs New Domain
delving into a new server, a dual opteron w/Centos. Got two questions as I think about setup.

1) 32 bit or 64bit?

2) Regarding host names and server assignemt...I can either assign it as a node to a domain hosted elsewhere in a reseller account, or I can start with a completely unused domain which is currently parked.

Any preference, in an ideal world?

(I have absolutely no preference, but it occurrred to me it may or may not be of consequence, perfomance & IT-wise and generally speaking .. all things being equal, of course.)

Like I said, a newbie. So I'm braced for the if-you-have-to-ask, you-shouldn't-be-in-one" musings for these rather basic boneheaders.

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Upgrading From Centos 4.6 To Centos 5.2
Does it worth to upgrade cent os to latest version on server where is installed whm/cpanel?Could i request upgrade from cpanel support ?

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CentOS 4 32-bit Or CentOS 4 X86_64 Bit
which one do i have to choose?? and why?

my server is P4 3.6GHz HTT with 2GB RAM

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HOW TO : CentOS 3/RedHat 9 ---> CentOS 4.5, Step By Step.
I've made a how to, based on my personal knowledge about upgrading a CentOS 3, RedHat 9, or 8?, Fedora Core, and maybe others, to the new CentOS 4.5 OS. (or CentOS 4.x)

[url]

Please post, comments, questions, etc. here.
I've myself upgraded many servers this way, (even, tonight, I upgraded another, so I finally decided to do this with all my notes)

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CentOS 5 Vs CentOS 5.1 Vs CentOS 4.6
Will be reloading server OS and wondering with which one of those should I go?

Now using 4.6

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Centos 4 Or Centos 5?
I have dedicated works on Centos 4. Now I have to reinstall OS. Administrators recommend me to put again Centos 4 and I would like to install Centos 5. Would like to hear opinion of professionals what it is better to put?

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CentOs 5.0
I have core2quad box with 4GB RAM, when i try install CentOS 5.0 on it then it show 3GB RAM only, and CPU just show:

Quote:

Processor #1 Vendor: GenuineIntel
Processor #1 Name: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz Processor #1 speed: 1596.000 MHz Processor #1 cache size: 4096 KB

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Centos 5
I have been using Centos for several years but have not been a user long enough to see what happens when the new version comes out.

I expect Centos 4 will be around a while however how quickly are hosting companies planning to adopt Centos 5?

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CentOS 32 Or 64
whats the difference with 32bit centos and 64 bit

I heard 64 bit gives better Mysql Performances but if I get 64 bit will I be able to use the same stuff I use on my 32 bit currenty?

Like directAdmin, APF firewall etc.., Just few from top of my head.

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Dkim On CentOS
is there anyone installing DKIM on CentOS? I am really confused how to do after reviewing ....

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Centos HDD
i have a colo server, lately im having problem, every 2-3 oclock in the morning my server crash, i asked the server management to have a look at it but no luck, they install rpm, reduce the http max, etc, etc ( i dont want to mention the name since my server management have helped me alot and its not fair for them if i speak a bad thing about them ) anyway,

I bought the server from siliconmechanics iServ R254

CPU: 2 x Intel Xeon E5410 Quad-Core 2.33GHz, 12MB Cache, 1333MHz FSB, 45nmHi-k
RAM: 12GB (6 x 2GB) DDR2-667 Registered ECC - Interleaved
NIC: Intel 82573V & 82573L Gigabit Ethernet Controllers - Integrated
Hot-Swap Drive - 1: 150GB Western Digital Raptor (1.5Gb/s,10Krpm,16MB Cache,NCQ) SATA
Hot-Swap Drive - 2: 500GB Seagate Barracuda ES.2 (3Gb/s, 7.2Krpm, 32MB Cache, NCQ) SATA
Optical Drive: Low-Profile DVD-ROM Drive
Power Supply: 520W Power Supply with PFC - 87% Maximum Efficiency
Rail Kit: 2-Piece Ball-Bearing Rail Kit
OS: CentOS 5 - 64-bit - Preload, No Media
Warranty: Standard 3 Year - Return to Depot - Advanced Component Exchange

Configured Power: 255 W, 262 VA, 871 BTU/h, 2.4 Amps (110V), 1.3 Amps (208V)

Im using CENTOS 5.2 x86_64

i check on the message log, this is the error before crash

hdc: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdc: no DRQ after issuing MULTWRITE_EXT
ide1: reset: success
hdc: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdc: no DRQ after issuing MULTWRITE_EXT
ide1: reset: success
hdc: status timeout: status=0xd0 { Busy }
ide: failed opcode was: unknown
hdc: no DRQ after issuing MULTWRITE_EXT
ide1: reset: success

Motherboard manual

[url]

i read on centos forum its a problem with the drive - the 500 gigs( the server read my hd as ATA instead of ATA )

i tried to go to BIOS and change to AHCI but server doest recognize the drive

[url]

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Centos Processing
im running centos and have a fairly high-end server. yet my services seem to be running a bit sluggish. is there a way to differntiate if its the server or the connection?

using free -m -t im only using half of my ram

(i dont know the command to check how much of my processors im using). im going to assume that that is also 50% or below. if any one has this command please let me know. if its not either of those im guessing its either bad routing be bounced everywhere, or some more localize like datacenter issue, bad router or something.

on a side note whast the command to restart sftp?

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CentOS Security
I am getting more into it and looking for the best way to harden it and secure it. Also some information about what processes to turn off and how to better setup my IP Tables.

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What Is The Best Antivirus FOR CENTOS?
What is the best anti virus FOR CENTOS 5.3. Installation and configuration of the way I can help.
Exactly and free anti virus and non-free 2 per model names.

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CentOS 5.3 ICH9R
Does CentOS 5.3 support ICH9R onboard raid? I want to use the onboard on a X7SBi SM board if I can.

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Ffmpeg Centos 5.2
I need to get the following libraries installed on my CentOS 5.2 Linux server aswell as install ffmpeg.

I don't know how to do this, I've looked around and I can only find ubuntu support.

liblame-dev
libfaad2-dev
libfaac-dev
libxvidcore4-dev
liba52-0.7.4
liba52-0.7.4-dev
libx264-dev

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CentOS And ClamAV
Anybody have a version running on CentOS 4.4...if so what version...keeps complaining about libcrypt.so.5, libssl.so.5 and a few other things that are not updated yet on CentOS 4.4

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Why Is CentOS Most Common
Why do most VPS servers have CentOS as the default/most common OS for linux?

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Centos Repositories
I have tried to use the Centos repositories as explain at

osresources com/11_6_en.html

I have created a file file.repo at /etc/yum.repos.d and I have added the content of "Adding official CentOS repositories"

at the end, when I try to add the key I get this error:

root@ yum.repos.d]# rpm --import RPM-GPG-KEY.dag.txt
error: RPM-GPG-KEY.dag.txt: import read failed(-1).
warning: u 0x9400278 ctrl 0x94010a0 nrefs != 0 (dag.wieers.com http)

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Hetzner Now With Centos
Hetzner finally added Centos 5.2 and Centos 5.2 64bit as available OS. No more KVM installations etc...

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CentOS 5 Is Same As RedHat 5
CentOS 5 is same as RedHat 5, is it?

I have heard that CentOS is same as RHEL excepting logo and name changes

If I want to learn CentOS, can I buy RHEL 5 book?

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Centos Won't Boot
see this screen shot:[url]

I used WHM to mount a spare partition and when the machine next rebooted, it give this error, nothing has been put on the disk as of yet.

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CentOS Server
I have a server with serverbeach and I have WHm and cpanel installed but I have no clue how to install any other programs on my server.

I wanted to install FFMPEG and a few other things but I do not know how to remote in or anything like that.

I am on Windows XP and I have full root access to my server (its dedicated).

Any help would rock because I am pretty new to Linux

I have no clue how to get to the command prompt or some kind of remote desktop and i am pretty sure its centOS5

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