Keeping Multiple Severs In Sync
Aug 11, 2008
We are in the process of replacing our site & hardware (all co-located servers) and moving to a five server config with 2 Apache servers, 2 MySQL servers and a stage server (where pages are prepared). The Apache servers utilise mod_proxy_balancer and a PHP/MySQL script to connect to either of the MySQL servers which replicate with each other.
The bit I am a bit stuck on is keeping both the Apache servers in sync with eachother in terms of files (pages & images) - has anyone got any suggestions that could help with this?
Ideally, the images would be placed on the stage server and automatically copied to the 2 Apache servers. I did have one idea which was to put the images on one of the MySQL servers and use that as a file store but then if that goes down, we are in the poo so to speak.
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May 31, 2007
How can it be determined that multiple domains are "affiliated" with each other? For example, at the link below, on the left side of the page it says that yahoo.com, yahoo.net, and yahooligans.com are owned together. Does this mechanism use WHOIS records, or does it use the IP addresses to which each address resolves (which would only get sites that use named-based virtual hosting to the same IP address, right?)
[url]
If people run multiple sites, say personal and business, and they don't want them to be affiliated, how can they make sure they can’t be linked with each other through such mechanisms?
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Apr 5, 2009
Am curious about Wildwest Dedicated Servers and VPS Servers.
I'd like to know for those of you - your thoughts either way on your experiences Good, bad, what you learned while being there.
1. What you like about Wildwest Servers Dedi or VPS
2. What you don't like about Wildwest Servers Dedi or VPS
And anything else you'd like to throw in.
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Oct 28, 2009
I was doing a search on google and retrieved some files on it with some sites that should not be available to the public. I investigated the site a little bit and it looked like they are running ASP. I know with Linux servers you can place a .htaccess file which can restrict bots from accessing certain directories, but how can you do it with a windows server running IIS? I would like to get in contact with these companies and let them know about the issues I ran into with their site.
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Oct 21, 2009
We have a few single CPU (54xx quad core)systems running Hyper-V and looking at the Hyper-V Logical Processer Total value in Perfmon its staying pretty much from 85% to 100% all day long. Perfomance is mostly ok with an occasional hesitation, but the biggest reason is we are trying to avoid doubling the cost of SPLA license by not adding the second CPU. Most motherboards we have only hold 16 gig to 24 gig memory and by adding a second CPU both will probably be less then 40% or 50%
Any problems keeping a 54xx or any CPU for that matter running flat out as long as its cooled OK?
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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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Jan 1, 2009
I am using a email list manager to keep contact of our client and I need to send few thousand emails to my members occationally. Now I have noticed that gmail, hotmail and others consider you as a spammer if you send too many email.
But my contacts are legitemate. How Can it manage this list fairly?
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Apr 22, 2007
what's the most practical way to move ALL the content from one domain to another in terms of keeping decent search ranking as well as forwarding to the new domain.
So like say the current URL is:
[url]
And I want it to be:
[url]
So if you went to the example.com version it'd automatically forward to the example.org version and then the search engines would pick up on that and update the URL.
I've got full control over all the DNS zones, nameservers, etc etc...so whatever is the best option I can do it. I just don't know what that best option is.
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Apr 21, 2007
what's the most practical way to move ALL the content from one domain to another in terms of keeping decent search ranking as well as forwarding to the new domain.
So like say the current URL is:
[url
And I want it to be:
[url]
So if you went to the example.com version it'd automatically forward to the example.org version and then the search engines would pick up on that and update the URL.
I've got full control over all the DNS zones, nameservers, etc etc...so whatever is the best option I can do it. I just don't know what that best option is.
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Jun 11, 2009
I have wrote a shell script that uses public keys to sync data between some servers, the problem is that moving about 20 GB from one server to another, is consuming too much CPU, about 80%. Is this normal? Should I use nice -n +number scp -p bla bla bla.. as syntax to try to get a lower cpu usage?
I'm using RHEL 5.3 on both boxes.
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Mar 3, 2008
Basically, my client don't like yahoo as their host for their website, but wants to keep their "Yahoo! Business Mail". How can I do this without doing any "forwarding"?
They will be using Dreamhost to host their website.
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Jul 5, 2009
I'd like to create a forwarding address, and not have the original account keep the mail - but without having to delete the original account, since I'd like to keep my existing emails.
For instance if the old account is apples@domain.com, I'd like to forward new emails to oranges@new.com, where apples doesn't keep the new emails. Currently in cPanel when I create a forwarder apples@domain.com=>oranges@new.com, new emails are sent to both accounts.
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May 24, 2007
way to monitor traffioc usage by IP address on WHT a while ago.
Well finally I have managed to do it!
Here is what is displays...
PHP Code:
1201K 962M all -- * * 0.0.0.0/0 0.0.0.0/0
54545 41M fws-client1 all -- * * 0.0.0.0/0 192.168.2.6
507K 295M fws-client2 all -- * * 0.0.0.0/0 192.168.2.10
1015 824K fws-client3 all -- * * 0.0.0.0/0 192.168.2.14
0 0 fws-client4 all -- * * 0.0.0.0/0 192.168.2.18
0 0 fws-client5 all -- * * 0.0.0.0/0 192.168.2.22
66616 58M fws-client1 all -- * * 192.168.2.6 0.0.0.0/0
571K 568M fws-client2 all -- * * 192.168.2.10 0.0.0.0/0
905 126K fws-client3 all -- * * 192.168.2.14 0.0.0.0/0
0 0 fws-client4 all -- * * 192.168.2.18 0.0.0.0/0
0 0 fws-client5 all -- * * 192.168.2.22 0.0.0.0/0
I have just one final question....
In the event of a crash, will all the data that has been accumulated using iptables, be lost?
If so is there a way to store the values in a file, say every 5 mins?
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Jul 13, 2008
Anyone having difficulties getting this to work? Can't seem to get mail to sync even after the config says everything should be working.
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Aug 24, 2007
I have a web app that uses MSSQL Server 2005 as it's DB.
I am moving this web app to a new server (new IP addresses)
Once the DNS progation is complete, I need to then syncronize the data between the old DB/server and the new DB/server.
how to sync two MSSQL 2005 dbs?
Or is there another migration technique? (my hoster won't do any IP forwarding in their hardware)
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Jul 21, 2007
is it possible to block sync attack?
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Jun 21, 2007
it looks like SuperMicro MB H8DME-2 is locked it self. (I set password, and worked fine until few days ago, and password does not work anymore.. and it is locked)
Is there any good way to flush this password with keeping all setting?
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Jul 14, 2009
We want to build a file server in our office - either Windows or Linux (doesn't make a difference to us).
We have a lot of satellite offices, and want to have certain computers have access to specific files/folders on the fileserver.
The catch is this... we would like some of our satellite computers to "sync" with the files/folders on the fileserver.
For example, a developer who is constantly working with a particular client, will always want his/her files to sync up with what is on the server.
The developer will want to work with a local copy of the files, and once finished, will upload them to the file server.
A few days go by, and there is a possibility the fileserver has additional information for that client. The developer would then want to download the changed files from the fileserver.
The benefit of working with local files, is that it is quicker to make changes. We can always leave the desktop on overnight to sync between the fileserver and the desktop.
Any suggestions what to look into here?
All of our desktops are on Windows, so we would need a windows application that has this functionality.
Rsync seems to be the closest thing I've found so far.
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Jul 9, 2008
I want to run Rsync to sync a folder from an FTP server - which I have limited access too with my server.
1. Do I have to have rsync installed on the server with the FTP too, as I won't be able to do that as it is not my server.
2. Is Rsync easy enough to get up and running and set it to run every 24hours?
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Jan 28, 2007
I recieve the error when ClientExec is trying to send email in my rejectlog...
2007-01-28 20:53:17 SMTP protocol synchronization error (input sent without waiting for greeting): rejected connection from H=[255.255.255.255] input="EHLO host.domain.net
HELO host.domain.net
"
I added host.domain.net and 255.255.255.255 to the whitelist files and added this ACL to exim.conf after begin acl:
acl_check_connect:
accept hosts=255.255.255.255
control=no_enforce_sync
accept hosts=host.domain.net
control=no_enforce_sync
accept
If it matters, I am running CentOS4 64-bit, DirectAdmin, Kernel 2.6.18
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Jun 8, 2008
I have two Plesk servers running on CentOS. I want if one server goes down 2nd will start serve requests to clients. But data should be sync from first server to 2nd server or we can say 2nd will 100% replica of first. So if one server goes down 2nd will start serve users data thats they required like databases, emails and web request.
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Nov 17, 2014
When I try to unlock a subscription I get the following error message. The fact is that I have not customized any time any parameter of this subscription, but has blocked me.ERROR: Call to a member function isDefault() on a non-object (Domain.php:966)
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Jun 11, 2014
I'am using Plesk 12 Web Pro Edition, I would like to know how can I sync my customers with WHMCS? I have config Plesk Server (at whmcs, module version Plesk 10/11) according to WHMCS. But I still with error and without can sync, users, domains, etc... from plesk web pro to whmcs.
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Sep 28, 2008
I'm looking for a method to basically clone my plesk site to another hosting provider also running plesk, the idea is so if my site A is down, I can just re-point the dns entry to Site B, and minimize downtime.
It makes sense to me to pay 2x hosting costs so I can have a site mirrored in case the main site goes offline, then I can just switch the dns to the new host. The trick is how can I automatically keep Site B mirrored as part of site A. Using Plesk Backup doesn't seem practical as it's not automatic. Does Cpanel have a site mirroring feature?
Would something like rsync work? Doesn't this require shell access? I'm looking for best practices to be able to mirror Site A to Site B in an automatic method..
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