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13

Roaming user profiles are going to be painful to use via the Internet. Any significant number of files in folders (which the AppData folder is notorious for having) is going to cause painful delays in profile synchronization during logon and logoff. Due to the way profiles are copied (file for file) latency will impact this, though as long as you're using ...


10

The big deal with cloud is flexibility, and you pay a slight premium for it. If you need 5 TB all the time, buying your own hardware is more cost efficient (though you still need to factor in maintenance, warranties, replacement, etc). If you need 5 TB for a short amount of time, renting it through the cloud would be much cheaper than buying all that ...


10

You might take a look if you have not come across this site yet (http://www.datacenterknowledge.com/). A ton of white papers across the topics. Some are "marketie," but still good starting points at the very least.


10

Start with the power. It will pretty easily show you how much of everything else you need. Get a number, maybe ask the electricians, of how many KW or KVA the project is. If it's less than say 12 KW, you are talking a medium size build out. Few racks, say five, a hundred or so servers. 100 * (1 amperes) * (120 volts) = 12 000 watts = 12KW Account for ...


8

Cloud computing of the type popularized by Amazon and Rackspace is not a direct replacement to colocation, or even VPSs. A good breakdown can be found here: http://serverfault.com/a/278547/ Cloud systems help you if you're looking for an elastic infrastructure. If your infrastructure is static, you have X servers and that number doesn't change for months ...


8

In the Advanced TCP/IP settings for the IPv4 and IPv6 configuration of the external adapters, uncheck Register this connection's address in DNS in the DNS tab.


6

Some security defenses: OSSEC IPtables firewall (white list instead of blacklist) SSL for phpmyadmin and certain other pages where you use login data Virus scanner like ClamAV update your machines daily The first one is a well documented Intrusion Detection System the second one is a tool to make firewall rules, it runs on top of netfilter. Backups ...


6

Multicast isn't currently allowed on Rackspace Cloud Servers. The traffic volume of multicast traffic ends up overloading the switching layer and it degrades network performance for all traffic.


6

You should let Google handle the mail reception / sending if your cloud should not take care of it. The MX DNS type is specific to mail and conveniently indicates (with priorities) which server will actually handle mail reception for a given domain. Thus avoiding the need to specify a mail server / subdomain. But it may work also without the mail. prefix, ...


6

It's necessary to do offsite backups at all times, regardless of any guarantees, assuming you care about your data. The ideal solution is to have backups on-site for quick recovery, and backups off-site for disaster recovery, and both backups should preferably be situated on RAID-6 storage.


6

After contacting support, this is the answer they gave: RXTX Factor Aggregate outbound bandwidth, in megabits per second, across all attached network interfaces (PublicNet, ServiceNet, and Cloud Networks). Outbound public Internet bandwidth can be up to 40% of the aggregate limit. Host networking is redundant, and bandwidth is delivered over two ...


5

That's completely up to your provider, and ultimately, your selection of a provider. Any shared platform carries risks of your neighbors on the platform causing problems for you. In the case of a DDoS, the shared network infrastructure they're using was probably overrun. Ideally, they would work with their upstream ISPs to drop the traffic before it ...


5

You need to combine your issued certificate and unencrypted private key into a .pfx file (PKCS#12 format) in order to import it into IIS. Use the following OpenSSL command: openssl pkcs12 -export -out "output.pfx" -inkey "Unencrypted_Private_Key.pem" -in "Issued_Certificate.cer" -certfile CACert.crt The certificate and key files are just text files with ...


5

The answer to your question is probably lying in the manufacturer's data sheets: Short answer is that if the gear meets the Cat6 spec's requirements it's a "Cat6 panel" - One manufacturer may just barely meet those requirements, another may meet them with a bit of a margin, and a third may have a wide margin of performance above the requirements of the Cat6 ...


5

Very likely. And no - you should not see a difference in ONE string.find method call. The limiting factor on most virutalization platforms is CPU and memory - you only can have that much memory and that much CPU power in one box. So, you have to keep them "aligned" by basically assuming every slice of memory comes with a slice of CPU. As such, a 2gb server ...


5

You can do this. Were I you, I would only do this if : You had no need for local servers, at all. Your internet connection was rock-solid.


5

We use dnsmadeeasy for exact same thing. DNS monitoring and failover would help you with this. For mysql, you can setup 2 way or one way replication; two-way replication is better as you don't have to worry about replicating data back when you switch back. And everything can be completely automated failrly easily.


4

I'm not with Rackspace, but having worked for a hosting provider I can give you one general piece of advice: If your provider says something to the effect of "We can't guarantee that X will work" and you elect to do it anyway you are outside of anyone's ability to support you. If it works, "Hey that's great! We're really happy for you!" If it stops ...


4

The easiest way to sync a local directory to Rackspace cloud files is through the console tools provided by the openstack/swift project. On ubuntu, the tools can be installed with apt-get install python-swiftclient Then, assuming you are in the directory you want to upload, run the following command in the terminal: $ swift -A ...


4

Munin is just what you are asking for. It consists of two parts; munin-master and munin-node. If you just have one host you can install both packages and munin will collect a set of default statistics, draw graphs and create a simple HTML dashboard for you. If you have several machines you want to monitor you only need one munin-master, but you will need ...


4

Have you looked at libcloud? http://incubator.apache.org/libcloud/


4

Amazon allows for static IP's to allocated to its EC2 instances. It is actually a pretty interesting concept that allows you to get a static IP address assigned to your account which you can then point to any particular EC2 instance you have running. So if you take a server down, you point the Elastic IP to a new instance and the outside world still uses ...


4

It's far from clear but I'm reasonably certain that it's the ratio of how much bandwidth there is available for both receiving and transmitting. For instance a machine with no limitations would have a RXTX factor of 100, whereas a machine that could only receive half of what it could transmit would be 200. Basically it's just rate-limiting on the network and ...


3

Stop you critical services and cleanup folder. The tmp directory is cleared by default at every boot. During deletion you may face with files which are in use, you can skip them.


3

Presently only the primary account user can delete virtual interfaces from a server. This is a known bug, since all admins should be able to delete VIFs, and it has been logged with the Dev team.


3

A variety of methods can be used to achieve this. Usually a combination of DNS load balancing and load balancers is the approach that is applied. Allows you to have multiple layers of redundancy, my simple flow diagram: User -> DNS Response (multiple IPs, makes sure you get a response from a respective cloud provider) -> Load Balancer (such as ELB or ...


3

You're missing the point of Mailgun. It is not intended to replace a normal e-mail infrastructure. If you want that, you need something like Google Apps for Business. Mailgun is intended for sending and receiving automated e-mails. For example, you might set up e-mails to support@example.com to be processed by a script to add them to your ticket system.


3

I am actually the developer of the Zipit Backup Utility. I just happened to find this. For restoring your site it should be fairly easy. You should have two files in their respective containers. 1 for the database and 1 for the files. You will need to extract the files archive locally. You will then have the timestamped folder and inside you will see the ...


3

I would use configuration management tools for this. You need something that will enable you to keep tabs on your machines AND allow for greater automation (spend less time at the console, more time doing things you need to do). Salt Unless this is auditing servers that have be completely separated (separate accounts), for your use case I would use ...


3

No, none will. Buy a server, put it into a rack ;) If you need a complete CPU / Multiple CPU's dedicated for yourself cloud computing simply is not for you.



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