Server Config- RAID And OS
Aug 9, 2007
I'm about to purchase a new Xeon dedicated server, however I'm unsure whether to opt for a RAID 1 configuration on the two 320GB SATA drives. Can this decrease performance in anyway or only increase? I run an extremely resource hungry site utilising audio/video en/decoding, running vBulletin so anything that might negatively affect performance could have a big impact.
Secondly, I'm unsure on whether to opt for CentOS 5 over 4.5. I'll be using cPanel of which I've heard there have been problems with the latest release of CentOS.
And finally, is it worth upgrading to Apache 2 and MySQL 5 (which I know is installed as default on CentOS 5)? The reason I ask is that I've heard of server load problems after upgrading to these latest versions on high traffic sites.
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Jan 14, 2008
So I've just got a server with 2xSATA raid 1 (OS, cpanel and everything in here) and 4xSCSI raid 10 (clean).
Which one do you guys think will give the best performance:
1. Move mysql only to 4xSCSI raid 10
2. Move mysql and home folder to 4xSCSI raid 10
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Mar 7, 2007
Quote:
Today we are going to conduct a detailed study of RAIDability of contemporary 400GB hard drives on a new level. We will take two "professional" drives from Seagate and Western Digital and four ordinary "desktop" drives for our investigation. The detailed performance analysis and some useful hints on building RAID arrays are in our new detailed article.
[url]
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Oct 22, 2009
I am in the process of restructuring the infrastructure on our servers. I am thinking of using either RAID 5 (1 hot spare) vs RAID 10 as my 1U server has 4 HDD tray.
RAID 5 would have better capacity but RAID 10 has better overall performance. Which one do you guys go for a shared hosting server?
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Dec 23, 2008
Is it possible to turn a non raided setup into Linux software raid, while it is live, and if it's the OS drive? Can you even software raid the OS drive remotely? I've been thinking about doing it for the redundancy (and possible slight performance boost for reads, but doing it more for redundancy). I'm using CentOS.
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Jul 11, 2008
I've been talking to the Planet about trading in my four and a half year old "SuperCeleron" (from the old ServerMatrix days) Celeron 2.4 GHz system for something new. As part of their current promotions, I've configured a system that looks decent:
Xeon 3040, 1 gig of RAM, 2x250GB hard disks, RHEL 5, cPanel+Fantastico, and 10 ips for $162.
Not too bad. I could bump up the ram to 2 gb for, I think, $12 more, which I'm thinking about and wouldn't mind some thoughts on. But, the thing that has me really confused is RAID. I like the idea of doing a RAID 1 setup with those two hard disks. But, the Planet wants $40/month for a RAID controller to do it. I really don't want to go over $200 a month!
Any thoughts on alternative redundancy strategies that might avoid that cost? Software RAID does not seem to be offered by the Planet, unless I can figure out how to do it after installation (is that possible?) Better ideas in general on the server?
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Apr 22, 2009
I just want to use a server for file sharing, it will have nginx and that's it. I'm looking at centos, or freebsd, but I been using centos forever now and I'm not sure how to use freebsd, should I just stay with centos?
Do I tell my hosting provider to just install the OS and give me ssh action and that's it? Don't install any control panels or any other stuff? I want one domain and one subdomain on it though and ftp action.
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May 26, 2007
Got a new box, Xeon 3060, 2GB memory, 2x250 SATA II drives. I have 1 mysql/php forum with about 60-70 users online and 1 multimedia download site.
the minimum configuration for Apache httpd.conf ? I just need a starting point to optimize.
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Jun 25, 2009
i have just installed Config server firewall on a linux server
i need to enable some ports, how can i do that?
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Jan 20, 2008
What is the best and cost effective way to setup multiple web servers to talk to 1 data base server?
Hardware Load Balancing or software?
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Aug 27, 2008
I am currently selling hosting from my reseller account. Planning to buy a dedicated server. I will be hosting around 250 hosting accounts with PHP and Mysql on a centos 5 OS with Cpanel. The 250 sites will be controlled by normal terms and conditions that comes with shared hosting. Now I am confused about the configuration to go for:
My Budget is around USD 200 per server.
Here is the config I thought to go for initially:
Xeon 3060 Dual Core
2 x 250 GB SATA II HDD
4 GB RAM
Cpanel/WHM
10 MBPS Port
Then I found this config for 20$ extra.XEON 3220 Dual Core
2 X 250 GB HDD
4 GB RAM
CPanel
10 MBPS Port
will 3060 is a good config or do you think should go for the 3220. Or should I save that extra 20$ and use them to get a hardware RAID 1 for 3060 server...?
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Mar 24, 2008
Is Motherboard RAID as good as a dedicated PCI-E card? I am guessing a dedicated card is the best option, though costs more.
We are looking at buying a barebones server from Supermicro. It features an onboard RAID controller which supports RAID 0, 1, 5 & 10 - but for some strange reason it will only support RAID 5 if you use Windows. Here is a link to the page detailing the RAID features.
[url]
We are going to be running Linux, CentOS 5.1, so we will only have the choice of RAID 0, 1 or 10. This isn't an issue, as having RAID 10 on 4x SAS (15k) drives will be fine for speed and stability. What is an issue is would this RAID controller be as fast or reliable compared to a dedicated PCI-E card? If it can only use RAID 5 in windows, does that suggest this controller is too reliant on software? It would be a nightmare to suffer downtime and data loss because the controller couldn't hack it during a drive failure, or one day it decided to bugger up the array when rebooting.
So that leads me to looking at this card, this looks very good for what we need. Are adaptec a reliable brand? I've seen it advertised for £200, which is a good price.
[url]
This card features RAID 5 and 6, would RAID 6 be better than RAID 10 for redundancy, or is it too slow to bother with? Also it seems to have a battery module available for it, what does this achieve? Cos surely if the power dies the hard drives and motherboard can't run off this little battery, or does it just help the controller stay alive long enough with some hard drive information in its memory if the power goes out during a rebuild?
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May 9, 2007
I'm having a very intermittent PHP error on my dual processor CPanel/CentOS 4x box. And it happens randomly across several domains, so I know it's not a single domain problem.
I can never figure out what causes it. 95% of the time the sites work fine (no error), but ever so often my php includes give me something like this:
PHP randomly fails to find the directory/file. And it requires an Apache restart to make it work smoothly again. It will be fine for a few days, but then it happens again. So I suppose it may not be directly related to PHP, but more of a server/apache issue? Any ideas at all?
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Mar 8, 2007
after a number of hours I finally got myself an SSH connection to my Linux server. I created an account with bin/bash access, whatever that is, and got in. Phew, this is all new to me!
I can get to the ./configure prompt and all looks well when I type command --enable-magic-quotes but I refresh my phpinfo() and nothing has changed.
All I want to do is install Joomla!
My Joomla! installation tells me to action following: Set PHP magic_quotes_gpc setting to ON
Set RG_EMULATION setting to `ON` instead of `OFF` in file globals.php
Display Errors should be on
Register Globals Emulation should be off instead of on
It's also telling me that the var/lib/php/session is unwriteable. Do I need to get shell access and command to do that too?
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Sep 17, 2009
I could try the Software-RAID 5 of the EQ9 Server of Hetzner.
Does anyone here has experiences, how fast a hardware raid 5 compared against the software-Raid 5 is?
The i7-975 should have enough power to compute the redundnacy on the fly, so there would be a minimal impact on performance. But I have no idea.
I want to run the server under ubuntu 8.04 LTS x64.
On it a vitualisation like VMware the IO-Load could get really high.
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Jul 8, 2007
I am in a somewhat complicated situation... I wanted to order a custom server with hardware 3Ware RAID controller but after over a month of waiting I was told the HW RAID controller, as well as any other 3Ware controller they tried, does not work with the motherboard used in the server from Fujitsu-Siemens and that they simply got a reply from FS that the controller is not certified to work with their motherboard.
So although I'd prefer a HW raid, I am forced to either choose a different webhost or setup a software RAID. The problem is, I haven't done that before and am somewhat moderately...scared
I have read a lot of the info about SW RAID on Linux that I could find through Google but there are some questions unanswered still. So I thought that perhaps some of the more knowledgeable WHT members could help me with this problem...
The server specs will be:
Core2Duo E6600 (2.4Ghz), 2GB RAM, 6-8x* 250GB SATA II HDDs, CentOS 4.4 or SuSe, DirectAdmin
* I prefer 8 HDDs (or actually 9) over 6 but I am not sure if their server chassis can hold that many HDDs, I am awaiting answer from them. They don't have any other drives beside the 250GB ones so I am limited to those.
The preferred SW RAID setup is to have everything in RAID 10, except for the /boot partition which has to be on RAID-1 or no RAID I believe, plus one drive as hot spare (that would be the 9th drive). I am quite sure they will not do the setup for me but will give me access to KVM over IP and a Linux image preinstalled on the first HDD so that I'll have a functional system that needs to be upgraded to RAID-10.
How do I do that? The big problem I see is that LILO or GRUB can't boot from a software RAID-5/10 so I will have to mount the /boot partition elsewhere. It's probably terribly simple...if you have done it before which I have not. I have read some articles on how to setup a RAID-5/10 with mdadm (e.g. [url] ) but they usually do not talk about how to setup the boot partition. Should it be setup as a small sized (100-200MB) RAID-1 partition spread over all of the drives in the otherwise RAID-10 array?
What about swap? Should I create a 4-8GB (I plan to upgrade the server RAM to 4GB in near future) RAID-1 swap partition on each of the disks or swap to a file on the main RAID-10 partitions. The second sounds simpler but what about performance? Is swapping to a file on RAID-10 array a bad idea, performance wise?
Is it possible to grow a RAID-10 array in a way similar to growing a RAID-5 array with mdadm (using two extra drives instead of one of course)? mdadm doesn't actually even mention RAID-10 despite it does support it without having to create RAID-0 on top of RAID-1 pairs if the support is in kernel, from what I know.
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Jul 31, 2008
Can anyone with previous exp. in Video Hosting/Streaming provide me some info on THE CONFIG AND BANDWIDTH REQUIREMENTS FOR ffmpeg hosting for youtube like site?
Here are the basic things-to-know & Server(s) Funtions:
1. Do Video Conversions from AVI, MKV, etc to FLV/MP4
2. Stream out these videos for viewers.
3. Expected Traffic: Quite High (1 Million Visitors/mo)
So can anyone suggest me the most suitable Server Config, Bandwidth (I'd prefer dedicated-unmetered b.w) and Host for this?
Also can anyone provide me info on the amount of video conversions and traffic a single server (with your recommended config) can handle?
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Aug 7, 2014
I have a little problem configuring the mail server in Plesk 12. I bought a VPS with Plesk 12 is hosted in OVH.es just for learning. I've got an external domain in OVH.es from 1and1.co.uk. The domain is properly configured and all is working well but the mail server.In OVH.es manager I can't create emails for an external domains (it is not allowed), only redirections. This is how it is in the manager: .domain.com MX 1 Redirecciones redirect.ovh.net.Support OVH.es told me that I can configure within plesk 12. I suposse it is in zone DNS but I don't know how to do it.
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Jun 12, 2015
I'm on plesk 12.0.18 and i would like to backup my server config. I have an error Logging::error('Available disk space () is less than required by storage bund...', 'fatal') called at /opt/psa/PMM/agents/shared/Storage/Storage.pm line 523
[URL] ....
the function un cat /usr/local/psa/PMM/agents/shared/HelpFuncs.pm is like that
Code:
sub getMountSpace {
my $mount = shift;
my $df = qx( df -P -k $mount) or die $!;
while ( $df =~ /^(S+)s+(d+)s+(d+)s+(d+)s+(d+\%)s+(S+)$/gm ) {
[Code]...
We've unchecked the disk space verification in backup settings with no more results ...
is it a way to launch the function reserveSpace and/or getMountSpace helper in shell ? to see the returned value ?
or can i launch /usr/local/psa/bin/pleskbackup server -c comand line to backup only the config ?
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Dec 5, 2014
I have plesk11.5 and found a big security bug in my script because plesk11 do a strange behavior:
[REMOTE_ADDR] => 95.*.*.*
[SERVER_PORT] => 80
[SERVER_ADDR] => 91.*.*.*
[SERVER_NAME] => domain.com
[SERVER_SOFTWARE] => Apache
[REMOTE_ADDR] => 2003:67:4b4b:*
[SERVER_PORT] => 80
[SERVER_ADDR] => 127.0.0.1
[SERVER_NAME] => domain.com
[SERVER_SOFTWARE] => ApacheClick to expand...
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Feb 25, 2009
How often do RAID arrays break? Is it worth having RAID if a servers hard drive goes down? I was thinking it may just be a better option to just have a backup drive mounted to my system and in the even of a system failure just pop in a new hard drive, reload the OS, and then reload all my backups?
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May 20, 2009
I have a new server and it is rather slow during raid 1 recovery after system installed
CPU: Intel Core2Duo E5200 Dual Core, 2.5Ghz, 2MB Cache, 800Mhz FSB
Memory: 4GB DDR RAM
Hard Disk 1: 500GB SATA-2 16MB Cache
Hard Disk 2: 500GB SATA-2 16MB Cache
root@server [~]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1] sda1[0]
256896 blocks [2/2] [UU]
md1 : active raid1 sdb2[1] sda2[0]
2096384 blocks [2/2] [UU]
md2 : active raid1 sdb4[2] sda4[0]
480608448 blocks [2/1] [U_]
[=======>.............] recovery = 36.7% (176477376/480608448) finish=1437.6min speed=3445K/sec
the sync speed is just 3.4Mb/second and the total hours needs to be more than 40 hours
Also the server load is very high (nobody uses it)
root@server [~]# top
top - 07:00:14 up 16:55, 1 user, load average: 1.88, 1.41, 1.34
Tasks: 120 total, 1 running, 119 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.2%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 4148632k total, 747768k used, 3400864k free, 17508k buffers
Swap: 5421928k total, 0k used, 5421928k free, 569252k cached
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May 22, 2008
I want to take some data from a raid-disk (taken from a raid-1 sstem). Put it into a new system already, but this system doesn't have any raid.
When viewing "fdisk -l", it said /dev/sdb doesn't contain valid partition. Is there anyway I can mount it now? I am on CentOS 4 box
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Nov 28, 2006
I have a 2003 SBS server with about 50 users on exchange. It is a standalone DC - all the users connect with 'profiles' and 'docs' on the server and use exchange thru outlook..when they leave the office they VPN in and exchange works like a charm.
Problem is for a quick setup I've used the POP 3 connector and kept the emails hosted on my server - I want to get rid of the POP3 connector setup altogether and have mail delivered directly to the server.
Can someone give me a walk thru of steps to do this - so far I have fgured out that I have to add the domain to the recipient policy - configure it properly and then setup each user to receive email for that username and it will just work....
I want to be sure and was hoping that someone who has done the same thing could point me to an accurate tutorial of sorts.
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Jun 15, 2009
On a rhel 5.3 + cpanel server, i have a time problem.
Web apps, as joomla show articles with a -2 hours time difference, or even webmail clients like roundcube are showing a wrong time when an email arrives. It seems this apps are not picking up the server time.
Both things (joomla and webmail) should use the configured server time.
I know Joomla can be fixed using the time zone option, and webmail too.. but in a server with over 300 websites, there are many joomlas installations and even more mailboxes...
/etc/sysconfig/clock have the right time zone.
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Nov 25, 2008
I've added this:
# Added for me
hostlist privaterelay_hosts = lsearch;/etc/privaterelay
And changed this:
accept hosts = +relay_hosts
Into this:
accept hosts = +relay_hosts +privaterelay_hosts
within the Exim Advanced configuration editor. Cause I wish to allow a relay without authentification.
This morning, I've got this:
cPanel was unable to automatically merge your Exim configuration with the new settings that shipped with the build you have installed (11.23.6-RELEASE_27698) because you have a custom ACL configuration which cannot be automatically configured.
To avoid any mail downtime, we thought it was best to leave your previous configuration intact until the new configuration can be properly installed. In order to complete this configuration update, you will need to manually merge your configuration with the new
configuration settings. Please follow the steps below to complete this update:
1. Enter the Advanced Configuration Editor
2. Notate any custom changes you have made in the ACL section. You may also which to make a copy of /etc/exim.conf.local and /etc/exim.conf.localopts as custom settings are contained in these files.
3. Click the 'Reset ACL Config to Defaults' button.
4. Reinstall your advanced custom settings.
Until you manually complete this update, automatic spam filtering may have been rendered inoperable to prevent any mail loss. (This generally only applied is you were upgrading from cPanel 10.x)
Current Config Version: unknown
New Config Version: 4.900000
What can I do to prevent this ? Cause last time, all mail was receiving a 550 (SMTP Protocol Returned a Permanent Error 550 Sender verify failed) which is pretty bad...
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Jun 2, 2008
I'm running a message board and it looks like I've outgrown the low end xeon 3040 1.86GHz dual core server, and the bulk of the CPU load is going to mysqld. I'm debating between offloading the DB to a dedicated server vs upgrading the existing server and hosting the web server and db on the same machine.
Any thoughts on the better approach? fwiw, the load from apache seems next to nothing right now, but I am also planning on adding an SMTP server for user registrations and general support email.
I'm also not super familiar with dual-core and dual processor machines. Does shifting mysql to a dual core or dual proc machine help (vs a single core/single proc machine)? since there is just one mysql daemon, does having a second core or proc. buy me anything?
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Oct 29, 2008
I am trying to do something that I believe is fairly non-standard. What I am looking to do is create a system where I can rapidly deploy web sites without having to restart named and Apache. For example, if a customer completes a process, I want to be able to turn that site on immediately using a temporary domain (somecompany.example.com or othercompany.example.com).
With some programming language (hopefully PHP) I would like to get the customer up and running with their site immediately without having to restart the server. While doing some research I found I could use MyDNS which uses MySQL to manage DNS data instead of configuration files. MyDNS can be updated on the fly.
For Apache I have seen wildcard configurations, but everyone seems to be suggesting the use of mod rewrite. I would prefer that the domain maps directly to a specific folder:
somecompany.example.com -> /sites/somecompany/htdocs
(*.example.com -> /sites/*/htdocs)
Does anyone know how I might do this with Apache. It seems similar to user directories (example.com/~username -> /home/*/htdocs)
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Mar 24, 2009
MY server configure our drives with RAID-1.
How can I check it my server configure with 3ware or software raid ?
Also please advise me how can I monitor raid configuration that my raid is working fine or no ?
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May 23, 2007
Just curious what your thoughts are on performance:
2 SCSI Drives 10k w/RAID 1
or
4 SATA 10k w/RAID 10
Prices are not too different with 4 drives just being a tad more.
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