Never owned a Mac, thinking of buying a Mac Pro, could use some advice...

Hey guys,
I know this was a lot to read, but I sincerely hope someone will take the time to answer my questions:
As the title of my post implies I've never owned a Mac in my life. I've always built my own desktops and usually gone to HP or Dell for my laptops. I'm approaching that time again where my custom-built desktop is looking outdated and I'm getting the upgrade itch. I'm looking at all the parts I need to order to build a computer and I can't help but think I'm older now with a full-time job and a one year old daughter in the house. Do I really want to go through the hassle of building a desktop from scratch again? Not really. So I started evaluating things a bit. As I get older I’m really just getting sick and tired of Microsoft’s antics (Vista was a huge disappointment for me) so I decided this could be the year for me to take the Mac plunge.
Now I’m an IT guy, so I have a pretty atypical setup at home. I’m currently running both Windows and Linux on all my computers. Rather than dual boot or use virtualization software I have a pretty intricate system in which I use a product called Acronis Trueimage to experiment with operating systems. What I do is perform a a clean install on an operating system, tweak it as needed for security and to use resources on my LAN than back up the customized OS install to a server a an image file. I have pre-built images for XP, Vista, Ubuntu and OpenSuSE that I can roll out to one of my machines in an average of 15 minutes whenever I get the urge to switch operating systems. I also serve all my data off a NAS box, so since data and OS are kept separate on the network I don’t have to worry about erasing something when I swap between Linux and Windows (as loading an image literally destroys the previous OS install).
So you can see I’m pretty highly specialized. I even have things down to the point to where I have custom images for specific purposes. For instance I have one XP image customized for development, one XP image customized for gaming, etc. Naturally if I got the Mac Pro I’d like to have the freedom to create a similar set of custom OS deployment images (Windows, Linux and OSX) for it as well. In researching the Mac Pro I have some concerns my current system might not work if I go that route. Am I correct in assuming that in order to run an alternative operating system on a Mac I’ll have to run boot camp or something like it? Or upon unboxing my Mac and tweaking Leopard will I be able to use disk imaging software to make a backup image of my preinstalled Leopard hard drive and then do a clean install of Windows XP or Ubuntu and set it up to function like a PC? I guess I’m asking if it’s possible (now that Macs are Intel-based) to run Windows or Linux exclusively on the Mac hardware?
Also I have some concerns about the proprietary nature of the Mac platform. From what I can gather in my research it seems the hardware is pretty locked in. One area that has me really concerned is gaming. I pretty much use Ubuntu exclusively at home for productivity and web surfing. However I still like to load that XP image every now and then to play some games on the LAN with my buddies. I’m not a fan of virtualizing for gaming because of the obvious performance hit you take, so I’d have to be able to run Windows XP free and clear. Also I checked Nvidia’s site and I see no OSX drivers listed there for their cards. Under the Windows platform they are always releasing driver updates to squeeze more game performance out of your card. What if I want to upgrade my video card? How do drivers work on OSX? Does Apple just integrate drivers for just a few specific video cards into the OS? Will I be stuck only able to pick from a handful of video cards approved by Apple?
Thanks in advance to anyone who can offer advice!
Message was edited by: ZeusABJ

Hi Zeus
I may be able to answer some of your questions. And sorry in advance if this sounds like yet another of those "religious conversion" stories
I'm a software developer/architect, mostly doing Microsoft .NET/C#/Web Services coding. I'd been a loyal Microsoft guy since I started on the original IBM PC back in the 80's. Like a lot of people (or so it seems) I just got fed up with Microsoft's high-handed and self-important ways. More importantly, the company always seemed to be lagging behind technically. Looking at beta versions of Vista did not bode well for the future - it just seemed awful. When Vista came out it it was the last straw - I just could not get enthusiastic about this bloated, slow, mess of an operating system. I really hated it. Still do. Even with a top-spec machine, Vista didn't run in the snappy, responsive way it I thought it should. Nothing seemed well thought out.. yuck!
Then, by chance, I was staying for a few days with somebody who had a Mac. Now, for years and years I not even considered Macs as remotely serious machines. My only experience of them was in the late 80's when somebody at work had one. He took delight in pushing a floppy disc into the machine so that it would respond "Ah, it's so big!". Great, just a toy. Not for serious programming work. So, encountering Mac OS X Tiger on my friend's iMac was something of a shock. It was so responsive, clean and elegant. When you turned it on it only took about 30 seconds or so for the thing to be ready for use, etc, etc.
Long story short, I bought an iMac, then a newer, bigger, faster iMac, then a MacBook Pro and now I have a Mac Pro. I still have to work with Windows to do my .NET-related day job. But 95% of the time I work on the Mac using various VMWare virtual machines. I can switch between Windows Server 2008, Windows Server 2003 and Windows XP in a few seconds and still be working in a Mac environment. And the performance of running Windows inside VMWare is even better than on my dedicated top-spec Windows laptop! I have a selection of virtual machines to choose from and, because these virtual machines are just files, I can back them up, revert to saved copies, etc. I've tried Bootcamp but it's much less convenient and performance inside the virtual machines is never an issue (although I don't do any gaming). So, you could keep virtual machines on your NAS box or local Mac hard drive.
With regard to graphics drives, etc. I've never had any problems whatever in this respect. For example, when I installed Windows XP on VMWare it automatically recognised all my hardware (including some obscure audio interfaces, USB-based MIDI interfaces, etc.) and made it available. I must admit that when I was new to the Mac I expected to have driver issues, but never have had... So, my guess is that you'll be able to run all your Windows and Linux distros on the Mac without too many problems.
You mention Apple's hardware as being "locked-in". I don't think that's the case. Certainly the consumer Mac models like the iMac can't be upgraded (by you or me) internally, expect for memory. The Mac Pro though is very easy to upgrade - though there may be some limitations with regard graphics cards.
Re your questions about graphics card drivers. Yes, these come with OS X in just the same as as with Windows. Because I've also used the card that comes "with the box" this has not been an issue for me. However, unless you get a Mac Pro you can't swap-in your existing graphics card. And even then I think you may find restrictions. However, other, more knowledgeable Mac users on this forum may have other thoughts.
Overall though, the experience of using the Mac in terms of software is very much the reverse of Windows - the OS is very open and well documented. It really is an IT person's dream machine - so much to fiddle around with (particularly if you know anything about Unix!). Unlike Microsoft who charge a FORTUNE for their development tools, Apple give them to you for free. And very good they are too!
Finally, one bit of advice. If you are considering buying a new Mac, join the Apple Developer Connection scheme as a Select member. It'll cost you around $400 to join but they give you a hardware discount for Apple-store purchased items that will save you a ton of $$$'s - absolutely definitely worth doing.
Hope this helps (and good luck)!
Russ

Similar Messages

I think I've got a memory leak and could use some advice

We've got ourselves a sick server/application and I'd like to gather a little community advice if I may. I believe the evidence supports a memory leak in my application somewhere and would love to hear a second opinion and/or suggestions.
The issue has been that used memory (as seen by FusionReactor) will climb up to about 90%+ and then the service will start to queue requests and eventually stop processing them all together. A service restart will bring everything back up again and it could run for 2 days or 2 hours before the issue repeats itself. Due to the inconsistant up time, I can't be sure that it's not some trouble bit of code that runs only occasionally or if it's something that's a core part of the application. My current plan is to review the heap graph on the "sick" server and look for sudden jumps in memory usage then review the IIS logs for requests at those times to try and establish a pattern. If anyone has some better suggestions though, I'm all ears! The following are some facts about this situation that may be usefull.
The "sick" server:
- CF 9.0.1.274733 Standard
- FusionReactor 4.0.9
- Win2k8 Web R2 (IIS7.5)
- Dual Xeon 2.8GHz CPUs
- 4GB RAM
JVM Config (same on "sick" and "good" servers):
- Initial and Max heap: 1536
-server -Xss10m -Dsun.io.useCanonCaches=false -XX:PermSize=192m -XX:MaxPermSize=256m -XX:+UseParNewGC -Xincgc -Xbatch -Dcoldfusion.rootDir={application.home}/../ -Dcoldfusion.libPath={application.home}/../lib -Dcoldfusion.dotnet.disableautoconversion=true
What I believe a "healthy" server graph should look like (from "good" server):
And the "sick" server graph looks like this:

@AmericanWebDesign, I would concur with BKBK (in his subsequent reply) that a more reasonable explanation for what you’re seeing (in the growth of heap) is something using and holding memory, which is not unusual for the shared variables scopes: session, application, and/or server. And the most common is sessions.
If that’s enough to get you going, great. But I suspect most people need a little more info. If this matter were easy and straightforward, it could be solved in a tweet, but it’s not, so it can’t.
Following are some more thoughts, addressing some of your concerns and hopefully pointing you in some new directions to find resolution. (I help people do it all the time, so the good news is that it can be done, and answers are out there for you.)
Tracking Session Counts
First, as for the observation we’re making about the potential impact of sessions, you may be inclined to say “but I don’t put that much in the session scope”. The real question to start with, though, is “how many sessions do you have”, especially when memory use is high like that (which may be different than how many you have right now). I’ve helped many people solve such problems when we found they had tens or hundreds of thousands of sessions. How can you tell?
a) Well, if you were on CF Enterprise, you could look at the Server Monitor. But since you’re not, you have a couple of choices.
b) First, any CF shop could use a free tool called ServerStats, from Mark Lynch, which uses the undocumented servicefactory objects in CF to report a count of sessions, overall and per application, within an instance. Get it here: http://www.learnosity.com/techblog/index.cfm/2006/11/9/Hacking-CFMX--pulling-it-all-togeth er-serverStats . You just drop the files (within the zip) into a web-accessible directory and run the one CFM page to get the answer instantly.
c) Since you mention using FusionReactor 4.0.9, here’s another option: those using FR 4 (or 4.5, a free update for you since you’re on FR 4) can use its available (but separately installed) FusionReactor Extensions for CF, a free plugin (for FR, at http://www.fusion-reactor.com/fr/plugins/frec.cfm). It causes FR to grab that session count (among many other really useful things about CF) to log it every 5 seconds, which can be amazingly helpful. And yes, FREC can grab that info whether one is on CF Standard or Enterprise.
And let’s say you find you do have tens of thousands of sessions (or more). You may wonder, “how does that happen?“ The most common explanation is spiders and bots hitting your site (from legit or unexpected search engines and others). Some of these visit your site perhaps daily to gather up the content of all the pages of your site, crawling through every page. Each such page hit will create a new session. For more on why and how (and some mitigation), see:
http://www.carehart.org/blog/client/index.cfm/2006/10/4/bots_and_spiders_and_poor_CF_perfo rmance
About “high memory”
All that said, I’d not necessarily conclude so readily that your “bad” memory graph is “bad”. It could just be “different”.
Indeed, you say you plan to “look for sudden jumps in memory usage“, but if you look at your “bad” graph, it simply builds very slowly. I’d think this supports the notion that BKBK and I are asserting: that this is not some one request that “goes crazy” and uses lots of memory, but instead is the “death by a thousand cuts” as memory use builds slowly. Even then, I’d not jump at a concern that “memory was high”.
What really matters, when memory is “high” is whether you (or the JVM) can do a GC (garbage collection) to recover some (or perhaps much) of that “high, used memory”. Because it’s possible that while it “was” in use in the past (as the graph shows), it might no longer be “in use” at the moment .
Since you have FR, you can use its “System Metrics page” to do a GC, using the trash can in the top left corner of the top right-most memory graph. (Those with the CFSM can do a GC on its “Memory Usage Summary” page, and SeeFusion users can do it on its front page.)
If you do a GC, and memory drops q lot, then you had memory that “had been” but no longer ”still was” in use, and so the high memory shown was not a problem. And the JVM can sometimes be lazy (because it’s busy) about getting to doing a GC, so this is not that unusual. (That said, I see you have added the Xincgc arg to your JVM. Do you realize that tells the JVM not to do incremental GCs? Do you really want that? I understand that people trade jvm args like baseball cards, trying to solve problems for each other, but I’d argue that’s not the place to start. In fact, rarely do I find myself that any new JVM args are needed to solve most problems.)
(Speaking of which, why did you set the – xss value? And do you know if you were raising or lowering it form the default?)
Are you really getting “outofmemory” errors?
But certainly, if you do hit a problem where (as you say) you find requests hanging, etc., then you will want to get to the bottom of that. And if indeed you are getting “outofmemory” problems, you need to solve those. To confirm if that’s the case, you’ll really want to look at the CF logs (specifically the console or “out” logs). For more on finding those logs, as well as a general discussion of memory issues (understanding/resolving them), see:
http://www.carehart.org/blog/client/index.cfm/2010/11/3/when_memory_problems_arent_what_th ey_seem_part_1
This is the first of a planned series of blog entries (which I’ve not yet finished) on memory issues which you may find additionally helpful.
But I’ll note that you could have other explanations for “hanging requests” which may not necessarily be related to memory.
Are you really getting “queued” requests?
You also say that “the service will start to queue requests and eventually stop processing them all together”. I’m curious: do you really mean “queuing”, in the sense of watching something in CF that tells you that? You can find a count of queued requests, with tools like CFSTAT, jrun metrics, the CF Server Monitor, or again FREC. Are you seeing one of those? Or do you just mean that you find that requests no longer run?
I address matters related to requests hanging and some ways to address them in another entries:
http://www.carehart.org/blog/client/index.cfm/2010/10/15/Lies_damned_lies_and_CF_timeouts
http://www.carehart.org/blog/client/index.cfm/2009/6/24/easier_thread_dumps
Other server differences
You presented us a discussion of two servers, but you’ve left us in the dark on potential differences between them. First, you showed the specs for the “sick” server, but not the “good” one. Should we assume perhaps you mean that they are identical, like you said the JVM.config is?
Also, is there any difference in the pattern of traffic (and/or the sites themselves) on the two servers? If they differ, then that could be where the explanation lies. Perhaps the sites on one are more inclined to be visited often by search engine spiders and bots (if they sites are more popular or just have become well known to search engines). There are still other potential differences that could explain things, but these are all enough to hopefully get you started.
I do hope that this is helpful. I know it’s a lot to take in. Again, if it was easier to understand and explain, there wouldn’t be so much confusion. I do realize that many don’t like to read long emails (let alone write them), which only exacerbates the problem. Since all I do each day is help people resolve such problems (as an independent consultant, more at carehart.org/consulting), I like to share this info when I can (and when I have time to elaborate like this), especially when I think it may help someone facing these (very common) challenges.
Let us know if it helps or raises more questions. :-)
/charlie

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m.r.middleton wrote:
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1. Battery life. Seems like some people get 3 hours of usage and some get all day. What should I realistically expect keeping in mind I will use the wifi a bit at work so I don't have to pull my P-book out of its case every 5 minutes.
2. Screen quality. After the snafu with the bad screens in the beginning how good are they now?
3. I don't follow much iPod news so is another revision coming in March? I could wait till then but if they usually put out new iPods in Sept. like I have read then my impatience demands I buy now!
4) Sound quality. My old player has great sound quality... will the touch disappoint me? Or are most of you very happy with it?
Thanks all, it's taking everything I have to stop myself from running to my local a-store tonight and buying one up, but I figure its $400 bucks so I should at least be informed before I drop that kind of money.
Thank in advance!
PS: If anyone has some good advice and says go for it I am ready to run out the door tonight so don't hold back folks!:)
Message was edited by: halcyonseven

1. I don't have an issue with battery life because I use it mostly to go online from the couch while watching TV. The battery life could be better, but considering how well the thing runs in general, it's still pretty good.
2. My screen from September is great, and I haven't had problems with it. I leave the auto-brightness feature on and it's always bright enough.
3. No idea about new iPod versions.
4. I think this iPod has great sound quality. I leave the special equalizer settings off.
You'll enjoy the iPod touch, no doubt. Erm, just make sure Apple gives you your free apps. It's a great MP3 player, but as mentioned before, make sure they give you the apps with it. Today isn't the greatest day to get anyone's honest opinion, as many people feel a little upset at Apple, but the truth is that one way or another, the iPod Touch is an amazing product.

Power Mac G4 & OS 9 Problem...can use some help!

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Next, I figured I would by-pass the extensions folder, and I restarted with the shift key down. The OS 9 window did display itself along with it telling me that the extensions folder was 'off.' To my surprise, the error window came up again, telling me that there was an error #41 and to restart. I have been in this loop all morning and I can't get out. Even if I had to reinstall the a new operating system...how do I by-pass the the aforementioned loop within my computer to get to the installation information, etc.
Can anyone tell me what is going on? What can I do? Can it be fixed? Is it a major problem or, a simple one the can be resolved? Any answers out there? Help!!!!!
Thanks,
HJ

Hi, HJ -
Error #41 is a somewhat generic one, usually indicating that the OS itself is damaged. This Apple KBase article addresses that -
Article #TS2207 - Mac OS: Error Type 41
The solution given is to re-install just the Core OS files. In order to do that iou will need to use an OS 9 Install CD valid for that machine, and of a version equal to the installed OS 9 version.
Boot to the CD, run the installer - when you select your hard drive and click okay, you'll be asked what you want to do - click Reinstall. On the last page of the installer, the page with the Start button, click the Customize button.
On the new page, uncheck everything (make sure they have neither checks nor dashes) except Mac OS 9.x; to the right of it is a pulldown menu, preset at Recommended Installation - select Customized Installation from that.
In the new window, uncheck everything except the first item, Core System Software - again, make sure none of the other boxes have checks or dashes. Click Okay, click Start. That will re-install the System, Finder, other basic OS files, and nothing else.
<hr>
Even if I had to reinstall the a new operating system...how do I by-pass the the aforementioned loop within my computer to get to the installation information, etc.
In order to do a re-install (Core System or complete) you will need to boot the machine to an appropriate CD.
When you boot the machine to a CD, the OS on the CD is running the machine. This means that nothing on the hard drive is in use, including any damaged files. This is one of the primary virtues of retaining install disks - they allow the machine to be booted, and usually repaired, regardless of the state of health of the OS on the hard drive.
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If you do not have an OS 9 Install CD of a version equal to that of the installed OS 9, you will need to re-install the complete OS. The easiest way to do that is to use the Software Install CD that came with the machine, or a later version retail OS 9 Install CD. Boot to that CD, and on the page where you select the destination drive click the Options button. On the new page checkmark the Clean Installation option, okay the page, continue the installation.
Note that with OS 9 a Clean Install will not remove anything - it will install a brand new System Folder and do little else.
Article #TA43881 - Mac OS 8, Mac OS 9: Performing a Clean Installation
A Software Restore CD can not be used to do a Clean Install, and, if appropriate care is not taken, can result in the loss of data on the hard drive.

HT1270 I think that 2012 mid Macbook pro could install the 16G memory...it should be 8Gx2

but i saw it on app.com is
and

Boyang Geng wrote:
The maximum memory should be 16G ,not 8G
i order 8Gx2 Memory from Amazon yesterday,is that ok wo install in my Macbook pro
Mine is MD103..the 2012 mid 15 inch Macbook pro
That is still not a question but .....
Your MBP can accept a maximum of 16G (2 x 8G chips of the correct specification)
OK

Never owned a Mac, thinking of buying a Mac Pro, could use some advice...

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