I want to prepare myself for getting dugg and whatnot, so I want to mirror my site ahead of tiem. The problem is that it's very db-intensive so there's a db that all mirrors would have to query. What's the best way to deal with multiple dedicated servers in order to spread traffic load and not crash my site?
View 3 RepliesI have a problem with a customer. For the last 48 hours he has been receiving a massive DDoS at his server. I tried blocking the darn IPs but they keep coming and with several hundreds of connections each:
104 78.157.168.98
125 83.226.157.91
126 89.103.109.65
131 89.12.150.23
135 84.251.196.78
135 86.122.0.135
135 91.127.235.86
154 84.24.14.41
160 193.216.140.101
331 89.151.8.78
419 78.0.103.64
Apache has over 14000 connections. I tried using mod_evasive but didn't do anything and the server has been out without httpd for hours now. Any advices? This is a Hsphere server (I hate it personally) with 4GB RAM and a dual optero 246. I have the mexclients setting at 550.
How can I better monitor and trace down I/O spikes? I've noticed the wait hit 60% every now and again... could someone be running a rapidleech script and if so, how can i find it?
View 2 Replies View RelatedI have a dedicated windows server. I have it protected to the best of my ability (disabling administrative shares, anti-virus, anti-spyware, disabled remoted desktop, firewall, etc.). The purpose for the server is to host game servers. Over the past month, ive noticed massive amounts of bandwidth being used. For example Windows reports the bandwidth usage at a little over 2 GB in 1 day, yet on my control panel which reads the traffic from the switch, it shows that 9 GB have been transferred. I asked the colo what's happening and they said that traffic that is blocked by the firewall is still counted toward my monthly limit. But how can there be 7 GB of blocked traffic, keeping in mind i never had this problem months ago. As a test, last night i disabled all game servers and applications that use bandwidth. In the past day over 9GB has been transferred, despite the fact that i have nothing running that takes more then 50KB of bandwidth.
Aside from these bandwidth issues, everything is running fine, my passwords are still the same, etc. Is there anyway detect security holes, so that i may patch them when i reinstall the OS? I asked my colo for a security audit.
My question is, do you think my server has been compromised?
What traffic monitor would everyone recommend for sites that have as many as 5,000 to 10,000 hits an hour?
View 8 Replies View RelatedI've noticed that vBulletin and one of my directories is getting hit hard for the same file by sites in the Netherlands, Russia, Vietnam and China.
The lines typically state the same, trying to hit a file that isn't there, which may be in a forum/ or forums/ directory instead of the root.
'/home/mysite/public_html/forumdisplay.php' not found or unable to stat
'/home/mysite/public_html/newthread.php' not found or unable to stat
What have you guys done for this? I'm assuming an .htaccess edit may be in order. I'm also hoping to track IP addresses so that I can keep adding them easily. I wish it was more simple to do it on the server level using whm since it's usually accessible everywhere.
I've gotten several messages from cpanel like this:
5 login failures attempts to account mysql (system) -- too many attempts from this ip
Can any suggestion a host, and incidently perhaps the best album script, to host as much as 100,000 photos? I'm not sure size yet, but 10-15 gigs is expected. Currently there's 40k photos, but I'm leaving room for expansion.
View 13 Replies View RelatedI have a server , and it look like have a litle problem by sending mails , becase IT IS SENDING A LOT OF MAILS ... this is the stats:
User - Domain - Messages Sent - Total Bytes Sent
nobody - - 3430 - 2407677
Anybody know some tool that could alert me in case some scripts send X mails ?? and say me the file of that script?
I know that nobody are sending a lot of mails , but where is the scripts that produce it?
I am trying to figure out what file system to use for my server. It has 24 hard drives, 2 run the OS in RAID 1, and the other 22 are in RAID 10. When I was installing the OS (Ubuntu 8), I kept on getting problems when I tried to partition and format the second drive (the one with the 22 disks in RAID 10) and it keeps failing on me. I then changed the file system type from ext3 to XFS and it worked fine. I also gave it another try and did not partition/format the second drive and decided to do it manually once the OS was installed. When I did it it told me that the file system was too large for ext3. So my guess is that ext3 has a limit on the size of the file system it is being installed on.
Anyway, so I am wondering, is there any other file system that will get me the best performance, mainly I/O performance, that I can install? I would like to stick with Ubuntu OS. This server will mainly serve large files for download over HTTP.
how to handle the file storage of a youtube clone?
Is it just a matter of getting more servers with a few hdds or are there specialized companies that one can upload files over a distributed file streaming network?
The reason I ask is because I have thousands of gigabytes of videos and it appears to be impossible to upload it on 1 dedicated server or even a few.
to change all passwords for user account on cpanel server. Is it possible to do it automatically by using some cpanel script? Also I need this information stored in one file in order to know new passwords.
View 4 Replies View RelatedI have a VPS-A with company A, within, I have 30 accounts.
Now, I wish to split them with min-impact, ie VPS-A with company A and VPS-B with company B (looking for 1 if you can suggest 1 good VPS company) where VPS-B will host also all the accounts in VPS-A.
Then, I wish to be able to have VPS- B mirror to VPS-A and so, if VPS-A is down, my 100 clients in VPS-A will not be affected and automatically swing to VPS-B.
What is my investment and what should I do to acheive that?
Alternatively, I hope, dreamfully, that VPS-A and VPS-B will be both active and VPS-A are VPS-B mirror and vice-versa.
In VPS-A, I have client 1 - 50 active and client 51- 100 mirror from VPS-B and in VPS-B, I have client 51 - 100 active and client 1 - 50 mirror from VPS-A.
In anything, I can balance the load from both VPSs and if one of the VPS is down, I can swing to the other and still with min-impact.
Then, when my faulty VPS is up, how can I swing back the 50 client to the original VPS?
I hope that my client do not need to change their dns if there is a downtime and also, auto update both VPS if there is an content or email uipdate from my client.
In Short,
1. I'm looking for another good VPS
2. How do I achieve mirroring with auto update to 2nd VPS without having my client changing their DNS when my VPS is down.
3. How do I achieve mirroring and load-balancing between 2 VPS without having my ciient changing their DNS when one of it is down and how to restore back when VPS is up again.
Getting massive amounts (thousands) of these lines in exim mainlogs and gz exim rotated logs too
Quote:
2009-04-21 09:20:45 [11305] 1LwGq4-0002wL-I3 <= <> R=1LwGq3-0002vw-Fa U=mailnull P=local S=1639 T="Mail delivery failed: returning message to sender" from <> for root@server.domain.com
Of course, the time is different (several days)
How can trace who / where this is coming from?
Its a cpanel box with suphp enabled, and all the exim tweaks you can imagine (ie, prevent nobody sender, max 50 mails per domain per hour, send callouts disabled, etc)
I run a small company and we have a web based application accessed by our customers, this application lets our customers run their business, tracking working, producing parts orders, job cards, invoicing etc.
The database we use is SQL 2005, what we are trying to achieve is have another server, either alongside the existing one, or if it would work at another location where the data from one server is written to the other server, so in the event one server went down we could quickly switch to the second server, my questions -
1, Is this possible?
2, If it is what impact does it have on the performance of server one?
3, Do both servers have to be in the same location?
4, How easy is it to configure assuming its possible.
5, Is there anything else I should be aware of?
my setup to start:
I've got two servers is two different locations.
one of them, the master server ( we'll call server A ), runs a large web site with a lot of content and a mysql server.
I've setup another server ( we'll call server B ), that is completely in sync with server A, both mysql and all data using mysql replication and rsync for data.
also I've setup round robin dns, which is also working correctly.
Now, my question is:
if server A goes down, and server B picks up after it.
how can i get those changes that were made on server B back in sync with server A when it comes back up. example, a use uploads files, or posts/edits/deletes data from mysql.
how should i handle this?
any ideas would be great, I'm sort on stuck on this one for the moment.
We are considering buying rackspace at a datacenter, and setting up two servers. The first would be the primary, lets call it Stewie. The second is called Peter.
Is it possible to setup some sort of either software or hardware solution that automatically mirrors all data from Stewie to Peter automatically?
Basically we want a redundant setup, where if either one of the server fails, the other can take over without any interruption and loss of data.
I was wondering how I can mirror another server, I have a client website and they want redundant DNS so if one of their servers goes offline, the other will keep it up. Any ideas how I can set this up? Is it difficult to do?
View 7 Replies View RelatedWe have a webportal that has a lot of data... and we have different versions of this portal in different languages (russian, italian, chinese).
Now for better performance in china we took a web hosting there and made a copy of the portal there...
It is working as expected but it is really hard to mantain different versions of portals on different servers with separated databases and all other important scripts...
Now we are making a rewrite of our system and this rewrite will use a central database and unified data (so a user of the local (eg chinese) portal will be a user of the global portal too!
Now the portal is based on cakePHP and mySQL... so the business logic scripts and the database are only one for all the portal versions. The only thing that changes for each portal are the config files (one per portal).
Now, making it work on one server is easy but we would like to make mirror servers in russia, china and italy. Lets call them B, C and D and the main server: A.
Obviously all the servers should be in synchronisation between themselves. I've read mySQL has a replication function that would deal with the DB synch. What about other files? The portal allows users to upload their photos, avatars, attach documents and video content. We would like this files to be synchronised too...
B<=>A
C<=>A
D<=>A
and not B<=>C
or B<=>D
How do we achive this?
I am looking for Backup Utility . Came across this two terms
Are RAID 1 & HDD mirroring synonyms?
Which is better RAID 1 & HDD mirroring?
First of all appologies if this is posted in the wrong forum, was unsure of where to ask the following questions.
We have a web server running a web application accessed by a large number of users during a working day. On an evening the web server is set to back up the database to another web server at a different location.
The server is running SQL 2000 ( although we are just upgrading to SQL 2005)
My question is how easy would it be to setup our server so it "mirrors" to our back up server. What I mean by this is that at periods during a working day the database is transfered to our back up server at periodic intervals, say every 15 mins, so that in event we suffer a problem with our main server could re direct our users to our back up server, with little or no data loss?
If this is possible does it also put extra strain on our server that is being accessed, i.e. would users notice a slow down of server as data is moved about?
If all the above is possible, is there any easy way of pointing our domain name at the back up server within say 15mins or so of main server failure? if our main server went down we could not redirect users form main server to back up, so is there any method of making this happen in event of failure of main server?
Does anybody know how I can mirror a websute using PHP?
I have 2 dif domains on different servers different OS, and I need PHP to collect the page from the other server from another domain.
I'm building the infrastructure for a live event site.
I have specced 8 app servers but I'm still unsure with regards to MSSQL.
The site functionality makes a single write to the DB with no reads. A simple option would be to have a MSSQL DB instance on each of the APP servers and simply collate the information after the event.
I've also been looking at the mirroring function of 2005 as it would mean we could get away with two MSSQL servers instead of 8.
Has anyone used MSSQL 2005 Mirroring? Is it easy to setup and maintain? Any caveats?
I have two partitions on my server (C and D), looking to mirror both onto my second IDE drive for some fault tolerance.
Just wanted to know whether there are any real benefits in this.
Secondly, is it worth doing both the primary (c) and the data (d) partitions or having just the data partition and using the free space on the second drive for a backup solution (which would later send data to an off-site backup)?
I'm a web designer - not an IT guy, as such I'm not 100% on setting up servers/dev environments etc...
I'm freelance and currently working in-house for a client that has set up a dev server that supposedly mirrors their live site - its a catalogue site with loads of dynamic elements.
The dev site they've set up displays only the html, no images or stylesheets link up when i preview them in dreamweaver as they don't logically link to the page as the pages are templates drawn from various folders.
What I want to know is is it possible to mirror a dev server exactly like the live website so the scripts etc all work as they do on the live site. I'm pretty sure it is as I've worked on dev servers before but not one like this bloody mess. The IT bods here seem to think the dev server is the best that is achievable - are they right? am I missing something???
I can't really answer any technical questions apart from i think the dev server is an apache server - what do i need to explain to the IT bods to get my point across?
We’ve been asked to offer a technical proposal for a new established TV station, and the IT manager of the station has a long list of requirements, we covered it all, only one issues lift as we never done it before:
They want about 20-100 GB server for hosting and they want to have a mirror server, incase the 1st server was down, so it would redirect the visitors to the mirror server, I'm thinking of getting them a dedicated or semi-dedicated server, but how do you do the mirror issue.
Some one said to get two dedicated servers, but::
1. How we make it that when one is down, it automatically directed to the other, I believe there is software’s for that, so were do we install this software: the original server or the mirror server.
2. Should they be from two different companies and to different countries?
3. The web site will be with CMS and DB, how do you make sure that the mirror server have all the new data that was updated in the 1st server’s DB, do they have like shared DB or something, and how..
Any other information, links, or suggested hosting sites for reliable dedicated server (with big bandwidth) would be greatly appreciated.. thanx
P.S. We use PHP/ MySql technology.
Well I am looking to learn to manage a server (so I won't need to hire others to do what I can do). However I have some basic questions.
1) So lets say you have a server with two identical HDD's and raid 1?? or a SATA controller so that the second HDD is just a mirror of the first HDD when/if the first HDD dies does the SATA controller or RAID card see that the first HDD died and switch to the second HDD so the site that is hosted on the server stays online?? I am thinking yes as that would seem to be the point of having a raid or sata controller and setup ??
Part twoto the question is is their software that you need to install that will make the server email you when/if a HDD dies (so you can do pull the dead one out and replace it with a new one). Or is it just that you would watch some type of server log(s) to stay ontop of if the server is running all good??
Second is how common (these days) is it for a server that would be new and brand name have a HDD die or have some other hardware failure?
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?
This is my first post and had a question about dns and mirroring.
Here is the scenerio :
I have my main website on server1 and it is a whm cpanel server. The website is dynamic and database oriented website.
I have another server - server2 with whm installed on it and I wish to configure both the servers such a way that the data is synchronised on both the servers in particular intervals.
Also I would like to configure dns redundancy in such a way that if one server goes offline for some reason, the website should be immediately resolving from the other server.
What are some of the most popular data mirror programs out there? The only one I know of that seems to fit the bill so far is Double Take and it doesnt have a set price so i had to request a quote (ugh). FolderClone is no good, I need it to run as a service on 2k3 and constantly be running. It doesn't need to mirror things very quickly but it has to do it efficiently, as a background service, and has to work with folders that have a decent amount of activity.
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