Jan 10, 2008

I have a DB server, running mysql 64bit. I would like to add another server to the mix to build some kind of redundancy if the 1st one were to go down.

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Setting Up Redundant Mirror/Mirroring Server

Jul 7, 2009

I have a LAMP server running and would like to have the exact mirror running on another location. I would like to sync the web files and database in either real time (upon any update) or in delayed mode (x minutes after the update).

For MySQL, I believe replication can do the job unless anybody has better recommendation. What would you guys suggest for web files? Can I use different Linux flavor but maintain back the same LAMP version?

Is there any "online" 3rd party load balancing service that I could use to load balance the traffic to both servers?

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Mirror/Mirroring Server

Jan 29, 2009

A great insight to alot of my research and thank you in advance for any advice given.

I have a server based in HK(with WHMCS) and host several websites. The speed and availability serves the Asia Pacific market/viewers well; but we have several new websites that also targets the European and North American viewers.

I have been researching on getting a dedicated server based in US to mirror our server. Therefore allowing the US/European market to access the website faster. Although we have a few problems (and very little budget to solve it too ;p)

1. We need to sync the two servers in real time ; rsync seems to be the best but is there any other reccomendations?

2. We will make the IP address in each servers the same, so our clients need not change their dns. Do we need IPcast/anycast?

3. Is there anything else that I may have oversight?

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Mirror/Mirroring Server Solution

Oct 29, 2007

My company requires a Mirrored Server setup. I hope someone can direct me to the right solution which guarantees the least downtime.

- We have 20+ php/mysql websites.
- We need two dedicated servers hosted in 2 different datacentres.
- Users are directed to the first server.
- If the first server is down the users are automatically directed to the 2nd server @ the 2nd datacentre.
- The software/hardware which redirects the users need to be fail proof or have an instant backup which takes over incase that goes down too.
- Data (databases and files) needs to be synced correctly to avoid data not being mirrored correctly.

I've done some reading and there is alot of mention of the DNS round and load balancers.

However, it seems these two options are also not fail proof.

Would appreciate if someone could simply outlining what system would be best for us for 100% uptime incase of server failure.

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Same Vbulletin On 2 Servers - Mirror/Mirroring

Dec 18, 2005

i am new to this and am in need of some help.. i have vbulletin 3.5.0 installed with photopost gallery and phpprobid auction...

I am hosted with fasthosts on a linux dedicated server, it is crap! it has been down 3 times in 1 month, the support is terrrible.. I have already movedit from pipex hosting due to lack of support for mysql. i canot keep moving my site, my brain will melt out of my ears ...

Can i link to my original install.. so if the fasthost server goes down,, could i have it directed to the old server? and can i keep the 2 databases current?

Hope i have explained it well enough... basically need a backup server setup for my vbulletin so, i dont lose potential new members..

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Setting Up Mirror/Mirroring Hosting

Apr 14, 2008

2 servers in 2 different continent. One will be primary and the other is redundant. It will be controlled by DNS fail over service.


1. What is the things that i need to consider before setting it up?
2. What is the best way to sync the data and databases?

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Two Mirror/Mirroring Dedicated Servers - How?

Sep 12, 2007

I have two dedicated servers on two different countries. My idea is having one of them fully active and the other as a backup server so that in case the first crashes or something I only have to redirect the domains to the second server.

Can you help me on how this can be done?

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Mirror/Mirroring List File

Dec 20, 2005

There are some Download Manager Programs that have a option like Find alternate URLs through mirror list file when giving a file for downloading. Where can I insert such a file in my site so that download programs can add other mirrors to it from my list of mirrors?

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Mirror/Mirroring Servers W/ CPanel

Mar 28, 2009

Does anyone run a setup where 2 or more cPanel servers (perhaps in a shared hosting environment) are dynamically mirrored for high availability?

How have you configured this? Does cPanel play nicely?

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RAID VPS Mirror/Mirroring Hosting?

Feb 24, 2009

I was wondering if anyone knows of any provider that provides RAID VPS Mirrored Hosting.

So if one drive goes down, the site will immediately switch over to the next one in the cluster.

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Identical Mirror/Mirroring Servers Vs. RAID5 NAS

Nov 16, 2006

We are expanding our photo sharing business and are revising our Unix-based server architecture. We're looking to develop a standard server configuration so that we can easily add servers when necessary.

Our ISP has recommended a configuration with mirrored web servers and mirrored RAID5 NAS boxes. I've read about Google's server architecture which consists of identical mirrored servers; when a drive or part from one of those servers goes down, data is served from the mirrored servers and the bad machine is repaired or replaced.

Comparing the two architectures with similar storage sizes, the overall cost of the hardware itself is about the same, with the identical mirrored machines being slightly cheaper. The monthly co-location fees (rack, power, etc.) are higher for the NAS solution.

I'm interested to hear your thoughts and experiences with similar solutions. I know the web/NAS solution is popular, and it's probably the one we'll go with, initially at least. Has anyone here implemented a Google-like identical mirrored server solution?

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Keeping Mirror/Mirroring Backups...anything Better Than Rsync?

Dec 17, 2008

Keeping mirrored backups...anything better than rsync?

I'm keeping mirrored backups of my servers. Does anyone know of any solution better than rsync to update the files on the backup server?

I've noticed that when running rsync it can cause a lot of disk i/o, which can slow down a running server.

Does anyone have any suggestions on how to decrease disk i/o or another solution to keeping mirrored backups on a secondary server?

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Setting Up A Mirror/Mirroring Site With A 2nd Web Host

Aug 10, 2005

I currently have a mirror site set-up on a seperate server (with a seperate web hosting company) for risk management purposes.

For zero downtime dependability, a load balancer cluster checking both servers in real time, and directing traffic at only servers that were online has been suggested.

However this option is rather expensive. Does anyone know of any other options?

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Looking For A Host That Would Mirror/Mirroring A Current Site

May 20, 2009

I was asked earlier today by one of the tech people at the university that I go to if I knew of any hosts that would offer some space/bw/access for a website that already exists. From what I was told, the host would not be the primary server for the website, so it would not require very much bandwidth, and the entirety of the website is only 300MB, so space isn't really an issue either (As most hosts now a days offer 1GB+). The catch is that they were planning on using rsync to update the mirror host, with the latest content from the live website, every 3 hours or so. Preferably, they want to spend as little money as possible on this and not buy a dedicated server or VPS somewhere, as that would be very costly.

So, does anyone here know of a host that would offer such a thing and allow SSH access to setup the rsync?

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Offline Website Mirror/Mirroring Program?

Mar 19, 2008

I am trying to find a piece of software that will allow me to mirror the online files of my companies domain. There are a number of contributers to the domain, so files are not stored offline in one location. I want to create an exact mirror of the contents that perhaps I schedule to mirror once every week.

I cant seem to find anything that would allow me to do this.... can anyone point me in the right direction?

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CentOS5 VPS - Yum Barely Working. How To Exclude A Mirror/Mirroring For YUM?

Apr 2, 2009

On a CentOS5 VPS I have access to "yum update" barely working due to the base mirror "styx.biochem.wfubmc.edu" being tremendously slow.

I'm trying to find out how to disable that mirror possibly via a mirror exclude setting in yum.conf or some other way. I've been searching but I've not found any documentation on this so hopefully somebody out there will know how to make this change.

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Mystery Mirror/Mirroring My Client's Site Is On Another Domain But Why?

Jan 29, 2009

I'm having an issue with a client site and I am not sure what to do at this point. Conversations with the host (GoDaddy) haven't led to a solution and to be honest, I'm not sure it's their issue to handle although I will be firing off an email to their domain dispute department shortly. I spoke with a couple of supervisors there and they were as baffled as I am.

Here's the situation:

When people Google the name of the client's business, it returns their site but on a different domain. The entire site is there, nothing is changed but the URL. It's like having an unintentional mirror site except that none of the forms work which is what tipped off the users that something was wrong but of course, they don't notice that they're not actually on 'www.clientsite.com' so they think it's just a form error when in actuality, they're not even at the right domain.

There is really no way for this other domain to profit from mirroring the client's site; it's just a business profile type of thing with a few forms for contact, employment applications and vendor applications. No secure info is transmitted other than perhaps the occasional email address but we're not talking a heavy volume site, it's a niche market and really not something that would be a typical target. There's no eCommerce, no subscriptions, no financial info.

I'm at a total loss. Could this happen if this other site is hosted on the same server as my client's site? Could it be an actual error of some sort or would it have to be intentional?

The whois for this bogus site leads to DomainsbyProxy.com and I'll be sending them a letter as well but I'd really appreciate any input you all might have on HOW this could happen. Should I also contact Google?

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Windows Server 2003 Software Array Mirror/Mirroring

Jan 8, 2007

We damaged a file on a windows server 2003 system which caused us to get a grey screen where the login windows should be (it was setup as a domain controller)

We tried booting it in safe mode and all the other modes etc etc.... but to no avail... we couldn't get it to work.

So we wanted to replace the file manually using another pc (by inserting one of the harddrives into the pc, and copying the file to it).

We used a windows XP machine.... imported the harddrive using disk management..... we had to un mirror the drive to be able to access it.

Once the mirror was broken i gave it a drive letter, copied the the new file to it, and, removed the drive letter i assigned it, and tried booting with *just* that drive in the windows 2003 server.

Now it wont boot, it just reboots everytime i tries to start up, probably because we broke the mirror on a different machine.

It still boots from the other untouched drive... that was in the mirror, but we have no way to edit the files on there.

So is there any way to actually get this, once mirrored drive, to boot now its a single disc?

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HowTO : Troubleshooting Ran Out Of Working CPAN Mirror/Mirroring In WHM Error

Mar 10, 2005

If you receive the following errors while trying to install a Perl Module through the WHM ...

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Mirror/Mirroring Site Hosting/aka: Impressed At Ability Of Cheap Hardware To Serve Static HTML

Nov 5, 2009

We recently began to mirror a large number of open source projects with a dedicated mirror server on our network and I was surprised not only with how popular the mirror server has become, is, but also of the ability of the hardware we're using to keep up with the load.

At an given time, the mirror seems to be pushing at least 50 Megabits of trafficthe server is also an IRC server (irc.igsobe.com) for customers and internal staff communications.

The hardware is a low end Dell Pentium 4 @ 2.66 GHZ server, running with 512MB of RAM and a 400 GB ATA hard drive. CentOS v5.3 is the operating system.

If you're interested, you can view the HTML logfile analysis here but that doesn't tell the full story as FTP users make up a good portion of the traffic. We've received over a quarter million hits in the first few days of November alone.

18:14:15 up 65 days, 9:04, 5 users, load average: 0.31, 0.69, 0.56

The only change that I made to the default configuration was lowering the maximum number of Apache servers to 128.

Just thought I'd share this information as I wouldn't have thought a server with such a small amount of RAM would be able to serve up so much data, even though we are talking strictly static HTML files.

I'll definitely keep this in mind when clients ask me for those "what type of dedicated server should I use for XXX" type discussions that are had all too often with clients.

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Redundant Dns, Backup Mail Server

Apr 15, 2008

We have 2 linux servers with plesk. We want Redundant Dns and backup mail servers for our hosting domains. We already setup Primary nameserver ip address is first server, Sec Nameserver ip address is second Server. like

ns.ourdomain.com - first server ip address
ns1.ourdomain.com - Second server IP Address

and how can setup backup mail server for both servers

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Redundant DNS

Oct 6, 2009

I have been working on and designing a hosting company. Now setting up my names servers has came to a question. When I ran a previous business with a partner he only use Name Servers on 1 Machine in 1 location.

Now my question is my first server is going to be located in New Jersey, USA . So that is where My first set of DNS starts. With my previous partner I noticed most of the customers were based in Europe, Philippines, etc. Over seas. Now What I am asking is Will a VPS in a different location work for DNS Server. That way I can keep a lower budget till we get a few customers under out belt.

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Redundant DNS Servers? How Do You Set Them Up

Apr 8, 2009

Because of the attack on theplanet yesterday, my sites were down.

People are mentioning adding "redundant DNS servers" to protect against downtime in future attacks.. but I haven't found any info on how to set these up.

I also seen somebody post that the planet doesn't allow "zone transfers" so I'm a bit confused at how to proceed.

I just registered an account at [url] and I'm unsure on where to begin. Their FAQ is just a large photo.

My .com is registered at Godaddy. Do I edit records at godaddy to point to the server IP? Or do I have to edit records via WHM?

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Redundant Hosting ....

Aug 13, 2009

I currently run spiderloop.com a SEO control panel designed for windows hosting accounts. The site and web service is hosted on our own server and works great, however I am concerned about redundancy and do not want to purchase a whole other server just to be fail safe. So I am going to purchase a shared hosting account to facilitate redundancy.

So here is the question.

How do I do it? How do I set up my current host to redirect to the new host when it goes down?

If the current host has problems how can I force the users browser to redirect to the redundant host? I simply don't understand.

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Is My Host Redundant

May 28, 2008

I have a renewal bill for my hosting account, but I can't see if I have any domains in it and therefore not sure if I should cancel it or not. I am with bright-byte.

Can I do a domain tools reverse search or something on the domain so it can tell me which of my domains are with that host?

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Redundant Config

Mar 18, 2007

I've decided to move from managed hosting to colocated hosting and I'm in a bit over my head as far designing the server configuration goes. I'm looking for assistance with setting up a fully redundant configuration with no SPOF (single point of failure).

The colo provider ensures full redundancy to the cabinet, terminating with two network drops from diverse bandwidth providers and HSRP. I need to eliminate all SPOFs inside the cabinet.

Some questions...

1) I'm thinking of using the Cisco 2960 Series switch as the in-cabinet distribution switch. I believe it supports HSRP. From my understanding, the switch will automatically failover from one uplink to the other in case of a network problem on one of the uplinks, and this will all be transparent to any servers connected to the switch. Is this correct?

2) However, this introduces the switch as SPOF. So, I believe what I need to do is ask the colo for a second pair of network drops and deploy a pair of 2960's. Then I would connect each server to both switches via separate NICs. Is this correct?

3) Finally, assuming I am on the right track here, I would like this to all be transparent and automatic with no human intervention required to recover from a switch failure. The servers will be running RHEL 4. How would I configure the network interfaces on the servers so that they can transparently use either (or both) of the switches? Is there some way to assign the same IP address to more than one interface? How does the OS keep from getting confused about where to send the traffic?

Thanks in advance for any insight. I would also be happy to hear recommendations for excellent network consultants that I could hire to design and implement this configuration for me.

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Redundant Server

Sep 15, 2007

I have two servers. One hosts about 55 small sites and the other does nothing.

Can I make use of the spare one to take over automatically if the main server fails for whatever reason?

I had been thinking of using Rsync to backup accounts / mail every 6 hours or so and then manually changing the nameservers on the domains in the event of server1 failing. Would that even work? Then I got thinking about it all being automatic.

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Redundant VPS Solution

Apr 14, 2007

I have a few VPS's, the main one has cPanel/WHM and runs all my sites / email / DNS and MySQL DB's. Heres a little info:

VPS1 - CentOS 4.4, cPanel/WHM, runs all domains (OpenVZ)
VPS2 - CentOS 4.4, Webmin, Slave DNS to VPS1 using Webmin cluster (OpenVZ)
VPS3 - CentOS 4.4, Webmin, Slave DNS to VPS1 using Webmin cluster (Xen)

However, if VPS1 fails for say 24 hours, im screwed!

So, my question is can I get some kind of redunadancy built in somewhere. For example if someone is trying to access my domain "mydomain.com" and the main VPS is down, then the request for the site would go to VPS2, or VPS3...

The same for the mail server, if some is sending mail to one of the domains on the VPS, and the main VPS was down, the mail would be sent to my other VPS's.

I just don not like the fact there is a single point of failure!

I do have WHM managed Weekly and Monthly backups of all cPanel accounts etc.

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Redundant EMail Service

Jun 11, 2009

We are a hosting company in Colombia, and we want start selling corporate email service.

The main idea is have two servers with redundance, I think this servers have to share the filesystem I don't know if using a scsi disk or just a network file system. We also want to have a good appliance for stop the SPAM, Im not so sure if we need to have redundance on it, its ideal but we are just starting the bussines and we dosn't have cliets yet.

Can anyone share their setup with us, and give us recomendations or tips?

Another option is, if someone know how to do that and have implemented this setup before and want to work $$ with us to implement that, please contact me to jbravo[at]colombiahosting.com.co

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Redundant Network Cards

Aug 29, 2007

to setup a Windows server that can support the failure of the switch that comes before it in the network diagram. The idea would be that if the 15A circuit the switch was on failed, or the switch just died, the server would still be online.

I already have two switches in spanning tree just before the server. Is there a way to assign a single IP to the server on both its network cards and connect each card to a different (spanning tree'd) switch?

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Redundant Power Supply

Jul 30, 2007

I'm upgrading my server again and now that we have 8 disks we need to upgrade our power supply (I was told).

But do I really need a redundant power supply Or can I just buy ONE 650 watt to upgrade?

These are my current server specs:


2 X AMD opteron 270 dual core
2 X 2 GB kingston PC3200 DDR ram
2 X 1 GB kingston PC3200 DDR ram
(6 GB total)
8 X seagate cheetah 15k.5 SCSI 73.4 GB, U320, SCA in raid 10
1 X LSI megaraid 320-2x raid controller, dual channel
1 X Tyan thunder 8KSE (s2892) mobo
1 X 2 * 4 port chenbro scsi backplane (8 ports total)
2 X AMD CPU cooler
2 X 40X40X10 fans
(Currently 1 X zippy P2G-6510P, 2U, single power supply, 510 Watt)
1 X Sony FDD 1.44"
1 X chenbro RM311, 3U case with 8 hot swap bays
1 X LG DVD/CD-rom burner

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