Urgent: what are "virtual host" and "external alias" used for on SICF?

I wonder what is their functionality?
Please help. Points guaranteed. Thanks!

Payal:
Your help is great!
The link says:
1.2.5.6
acmegate.acme.com
acmenet.acme.com
If more than one host name is assigned to one IP address, one host name is the default name, and the others are aliases. In the table, the default name is in bold type.
We want:
1) for all incoming requests from the internet to the ITS use:
acmegate.acme.com(i.e. the default name. The user will type http://acmegate.acme.com:####/xxxxxx);
2) for all responses from the ITS to the internet use:
acmenet.acme.com(i.e. the alias. The user will get
http://acmenet.acme.com:####/xxxxx).
If you could help with this, I really appreciate with 10 points.
Best regards.

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812643 wrote:
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I don't think you should worry about the RAID stuff. The only way you could create a RAID is by using external drives, or one those external enclosures with two drives inside. Any speed advantage of such a RAID would be mostly negated by the FireWire 400 connection.
Use your internal drive space for speed critical functions. Use a FireWire 400 external drive for additional storage space, where speed is important but not critical, such as storing your existing media (including your things like your iTunes library files). Use a separate cheaper USB 2.0 external drive for your Time Machine (or whatever method) backup archive, where speed is not that important at all (some people even use a network connection for their Time Machine backup).
You can get a FireWire 800 drive and use an adapter to connect to FireWire 400. The connection won't be any faster on your iMac, but you can use the drive later with a Mac that does have FireWire 800. There are drives that have FireWire 400 and 800, and USB 2.0.
I like the drives sold by OWC
http://www.macsales.com/
I often buy the drive enclosure empty and find a good deal on the hard drive mechanism that I want. OWC sells most of their drives empty. My current Time Machine drive is actually one of these USB adapters
http://eshop.macsales.com/item/Newer%20Technology/U2NV2SPATA/
connected to a Western Digital 750GB SATA drive that I got for about $70. Found that deal through dealmac.com. Couldn't think of a cheaper way to add that large amount of backup space, and it works very well. The internal drive in my iMac is only 160GB, so most of my personal data is on an external FireWire 400 drive; both drives are backed up by Time Machine.

What are the pros and cons of using a port system.

Hello All,
I'm a new explorer in the OS X UNIX world, and have installed macports, and, for the most part, succeeded in building and using a number of scientific applications.
I have noted a somewhat negative attitude by some on the use of port systems, while others seem quite content with them.
When making my decision to use macports, these "selling points" seemed desirable to me:
¤ Confines ported software to a private “sandbox” that keeps it from intermingling with your operating system and its vendor-supplied software to prevent them from becoming corrupted.
¤ Allows you to create pre-compiled binary installers of ported applications to quickly install software on remote computers without compiling from source code.
Especially the first point seems valuable, but am I deluding myself? Or, am I losing functionality/ flexibility? Or, am I just missing out on manually installing lots of dependents?
_I'm not trying to start a feud, here._
I'm just looking for some pointers (preferably well-substantiated) from those more knowledgeable than me, before I am any further committed to a choice I might later regret.
Thanks,
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The biggest drawback/complaint I have is that you're bound by the implementation/installation policy of whoever built the port.
For example, take the installation issue - all software gets installed into some specific directory which is great one one hand - fewer compatibility issues with conflicting versions from what Apple provide. The downside, though, is that nothing on your machine will use these versions unless/until you tweak them.
For example, maybe you want to install the MacPorts version of PHP, great, but the standard Apache won't use that, so you either need to install the MacPorts version of Apache, or tweak your Apache installation to use the non-standard PHP version.
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This becomes more of an issue in a multi-server environment where you have multiple systems that all need tweaking/maintaining - nothing worse than setting up a new server by copying an existing installation, only to find that it depends on MacPorts/fink/whatever being installed.
The corollary to this is that these package managers often install ancillary software that you do not need, nor want. It might have improved since I last looked, but installing either MacPorts or fink, for example, installs whole new versions of perl, GNU tools (gzip/gunzip, etc.), curl, and more - they even install new copies of openssl/ssh.
I don't want these. These already exist on my system so what are they needed for? Why can't they use the standard copies? Are they 'tweaked' in some way? How? why?
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Unlike most GUI-based software, much open-source software uses compile-time options to configure the executable. Now the port installer might do a reasonable job of tweaking the installation, but it's not psychic so there will be cases where you end up with sub-optimal installations. Sure, they might work well enough, but that doesn't beat knowing what those options are up-front and building your own.
Now there have been cases where I've tried to install software and almost given up when faced with a daunting list of dependencies (try RRD, or PHP w/ GD, for example) and have almost given up, but when you succeed the satisfaction of getting it working, plus the fact you now know how to do it counts for a lot.
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And right there is the final rub IMHO - all the while the port managers create their distributions of common tools Mac OS X is treated like a poor step-child that's kept in the cellar. OK, maybe not that bad, but there's no reason why anyone who wants to install open source software on a Mac should need much more than:
(download>
./configure
make
sudo make install
it really isn't all that hard. Too often the port managers perpetuate the myth that Mac OS X is too different from other UNIX systems to work with the standard tools that everyone else knows.
Now, maybe I'm also too old for this game since you always downloaded and built tools yourself when I started, and maybe package managers on Linux (which may have the same issues I've complained about) have helped elevate Linux in the mindset of a younger generation who are looking for a quick fix. All I can say to that is…
GET OFF MY LAWN! :-D

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Apple later said the devices were keeping more information than intended due to a bug, and issued a patch that reduced the amount of data. But, because it was used to improve and speed up location services, the practice continued.
And now, in iOS 7, Apple has added a tool that lets you see what your iPhone knows about where you go.
If you’ve got an iPhone 4S or later running iOS 7, follow these steps:
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Why in the world would Apple collect this kind of detail about your movements? It does so to enable features like Next Destination, found in the Notification Center, which is the screen you see when you swipe down from the top of the iOS display. Next Destination looks at your travel patterns and offers information about how long it will take to get to the next place you typically visit during the day.
If having all this location data collected by your iPhone makes you nervous, you can turn it off at Settings > Privacy > Location Services > System Services > Frequent Locations. Note that it is turned on by default, so if you don’t want your phone logging your whereabouts, you’ll need to turn it off.
The Next Destination feature is similar to one found in Google Now, which uses location and your habits to offer up useful information without your asking for it. Google Now is found in the Google Search app on both Android and iOS. On Android, you can add a Google Now widget to your home screen to make the feature more accessible.
In fact, Google collects similar information about you – and in greater detail - if you use its location-based products. Google stores your location data on the Internet, and you can see it on any Web browser.
Make sure you’re logged into your Google account – say, through Gmail – and then go to google.com/locationhistory. You’ll see a map showing location visits for today, but click the Dashboard link at the top of the page and you’ll see this:
To turn this off, click the gear icon in the upper right corner of the Location History page and choose History Settings. Then, click Disable and Save. There’s also a History Management link that lets you delete history items that have already been collected.
Location services are really an integral part of a ton of iOS apps, using the internal GPS system to add Instagram photos to a map, checkin with FourSquare or Facebook, or let your friends know where you are with one of many “on my way” apps, like Glympse or Twist.
If you’re battery is dying, however, the location services are the first thing you should turn off, as they suck up a lot of your iPhone, iPad, or iPod touch’s power needs, what with their background data sending and receiving and such.
Here’s how to turn them off.
Tap your Settings app to launch it, and then tap on Privacy. You’ll be able to turn the toggles OFF for any specific app that has privileges to access your GPS location by scrolling through the list and tapping them all. I do this on a fairly regular basis for both privacy and battery savings. I figure that with less apps accessing my location, the less battery power in total is being used for that function.
If you want to turn off Location Services completely, then simply tap the main toggle at the top to OFF, and you’ll stop using them. This will keep your apps that need it, like Maps or Compass, from knowing where you are, but the battery will thank you.
Follow the above steps to turn off Location Services :

What are best energy saving settings to use for the macbook?

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I suggest you try to run your MB from the power adapter as much as possible.
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What are the advantages and disadvantages to using Snow Leopard?

My computer runs best on Snow Leopard but can also run Lion. It's a 2009 Macbook unibody model.

telephonedude98 wrote:
My computer runs best on Snow Leopard but can also run Lion. It's a 2009 Macbook unibody model.
Since it's a 4 year old machine, in it's end of life stage and 10.7+ will slow it down in performance, I'd say stay on 10.6.8 and be happy.
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Apple HQ and about 750,000 Mac's got compromised by the Flashback botnet, so Apple went all the way back to 10.5 Intel to fix the problems they neglected so now they are paying better attention to the older OS X versions.
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Urgent: what are "virtual host" and "external alias" used for on SICF?

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