How stable is Linux?

How stable is a stand-alone Linux server (RH30) for a production database server? The reason I am asking this is because I have had a production Oracle database running on a HP-UX (RISC, 4-CPU (440MHz), 8GB RAM) and have had no problems for 3 years. The CPUs are consistently 98%-99% idle. I have the same Oracle database installed on a Linux server (intel, 4-CPU (2.4GHz), 4GB RAM) and the CPU idle time is always fluctuating between 30%-50% idle. It seems like the Linux box is doing a lot of work all the time. Should I be concerned?

Hi
There's no denying that RAC and Linux are a good fit... but currently the majority of Oracle cutomers who implement RAC have done it on Solaris with HP and IBM very close behind (this is of course changing).
Oracle also has many customers who have chosen to implement standalone databases on Linux without RAC.
Linux stands on its own as stable, enterprise ready OS. Whilst customers migrating from other Unix's will be famililar with it, it still pays to search the web for best practices for administering Linux and Oracle on Linux.
Remember Oracle offers unbreakable support for Linux i.e. you can phone up Oracle for both support for Linux and Oracle for your database server.
Hope this helps
Dom

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How can use linux in my macbook?

how can use linux in my macbook?

You can use various distributions of Linux either by running them under Boot Camp, or in a virtualized environment such as Parallels or VMWare's Fusion. Note that you may have to try several different distros until you find one that works. I settled on Ubuntu running under Parallels.
Best of luck.

How to execute Linux command from Java app.

Hi all,
Could anyone show me how to execute Linux command from Java app. For example, I have the need to execute the "ls" command from my Java app (which is running on the Linux machine), how should I write the codes?
Thanks a lot,

You can use "built-in" shell commands, you just need to invoke the shell and tell it to run the command. See the -c switch in the man page for your shell. But, "ls" isn't built-in anyays.
If you use exec, you will want to set the directory with the dir argument to exec, or add it to the command or cmdarray. See the API for the variants of java.lang.Runtime.exec(). (If you're invoking it repeatedly, you can most likely modify a cmdarray more efficiently than having exec() decompose your command).
You will also definitely want to save the returned Process and read the output from it (possibly stderr too and get an exit status). See API for java.lang.Process. Here's an example
java.io.BufferedReader br =
new java.io.BufferedReader(new java.io.InputStreamReader(
Runtime.getRuntime().exec ("/sbin/ifconfig ppp0").
getInputStream()));
while ((s = br.readLine()) != null) {...

How stable is iPhoto 6?

I have approx. 9500 photos in my collection. I was having problems emptying my trash, crashing and receiving constant requests to rebuild my library, so I bought iPhoto Library Manager and it's Great. I've split my collection into separate, smaller libraries and am in the process of cleaning and streamlining them.
However, my rebuilt library of 6000 photos, cannot trash more than 20 items at a time without crashing and being rebuilt. So I'm attempting to somehow to reimport & rebuild it even smaller, BUT how stable is iPhoto 6? is this a common problem? I like the program but am I wasting my time and should I explore other photo archive applications? Will iLife 09 be more stable, or is it too early to tell. The only apps I would use are iPhoto and iDVD.
It's having issues at only 7000 photos when it's supposed capacity is 25,000
Is this normal?
Thank you for any opinions, advice or knowledge anyone can offer.

My HD has a 150 capacity with 80GB free space.
Two of my sets I created with iPhoto Manager are on an External Drive of 500 GB, 450GB free.
I did some more testing and the 2 libraries that are crashing are on the Hard Drive. They are also the biggest, one is the buggy default library, the other is the rebuild of the default library. In the rebuild library I can trash only 20 photos at a time etc. (see above post) the other cannot trash anything. I was hoping to use the Rebuilt library as my main library(once I've cleaned out the old photos), saving to the others as needed, but since that is unstable I may start a new clean one.
Will it harm the photos/movies/files to copy them, yet again, into a new clean library (I'm using Library Mgr)? I have had a few problems/errors copying photos due to "unrecognized file type or the files may not contain valid data" these photos did not transfer.
I've also rebuilt these libraries numerous times with the option+command options.
If my system is the problem, what would you recommend as a next step?
Thank you also for the capacity/stability confirmation, I like the app. and would like to continue using it, once I get rid of my bugs.

How to install Linux on UEFI systems where GRUB fail to install?

A few of us are asking:
How to install Linux on UEFI systems where GRUB fail to install? Because after installing Linux, my MBR is messed up, and I get a "no operating system found" at system startup.
abvasili
I'm just a volunteer. I like to help others where I can. Do my ideas work? I hope so. o_O
Who helped you today? Do not forget to thank him.
My hardware: TP x120e 0596-2ru. Windows 7, sp1, 64Bit, English, installed in UEFI mode.
Solved!
Go to Solution.

Hi again,
I would like to answer to another question, just in case:
Question: Can I dual boot Win7 and Linux on a UEFI capable bios?
Answer: Yes you can. If your HDD is formatted in MBR partition table (or msdos) than you can install first windows 7 and than the distro of your choice. BUT, careful, if you install windows from a DVD media it will convert your HDD in GPT partition table and dual boot will be almost impossible... (or will give you a lot of headache) to avoid this, dump the win7 iso to an usb using Windows 7 USB/DVD Download Tool. Installing from USB will not change the hdd in GPT partition table.
take care
abvasili
I'm just a volunteer. I like to help others where I can. Do my ideas work? I hope so. o_O
Who helped you today? Do not forget to thank him.
My hardware: TP x120e 0596-2ru. Windows 7, sp1, 64Bit, English, installed in UEFI mode.

How to give linux partition mackbook's drivers

my problem is that I got a partition with linux and I CAN'T install drivers from installation Cd becouse there's no way to open .exe files by ubuntu...
I would like to know HOW can I install macdrivers into linux partition.

Hi Teugon,
Apple offers two types of installer package types:
.dmg - For Mac OS
.exe - Windows XP/Vista/7
Apple doesn't offer 3rd party support (.deb) for Linux nor is that recognizable OS for Boot Camp. So yes, I think your Linux related question would be better served via the countless number of communities that exist on the Internet. Besides, the previous posters above were just trying to help. Had the original question been phrased clearly perhaps there wouldn't have been such confusion. In a few seconds I was able to find all sorts of links regarding how to setup Linux on a Mac. Here's an example of one - http://sowerbutts.com/linux-mac-mini/

How to make linux bootable off a usb stick on mac

Guys i was wondering how to make linux bootable off a usb stick on mac, since i dont have a optical drive in my mac, plus i need it for university

I have the same question, but parsed differently. What people have tried answering here is:
how to (make linux (bootable off a usb stick on mac))
What I'm trying to find is:
how to make ((linux bootable off a usb stick) on mac)
That is, I don't want to boot from the usb stick on my mac; I want to write an ISO to a usb stick that's plugged into my Macbook Pro (Mavericks), then carry the stick to a different machine (several discarded Windows boxes in fact), plug it in there, and watch it boot on that machine. I've done a bit of googling, but everything I find talks about making USB drives with content that can be booted on a Mac. What I'm wondering is if it's possible to write to use my Mac to write bootable USB gadgets that work on other machines that aren't running OSX software.
Anyone know if this is discussed anywhere? If not, what's the right forum to ask it on? And how do I ask it so that I don't get yet another explanation of how to make something that will boot on my Mac?
I have several linux ISOs waiting. Actually, I could do the job on one of several available linux boxes. But I'd like to do it on my portable laptop, which at the moment is this Macbook Pro.

How stable and secure is iCloud?

Hi,
So I have recently started using iCloud a lot and I now rely on it for mostly everything online. I have a iMac and iPad and I want to use iCloud to save work at school so I can access it at home easily.
I have been doing some important work at school including 2000 word essays for Cambridge IGCSE and I am wondering how secure is iCloud and how stable is it? Because I'll be saving all, if not most of my work to iCloud in the future and I have changed my email to my @me.com for all services I use online.
Thanks.

This article discusses iCloud security: http://support.apple.com/kb/HT5125. However, iCloud doesn't provide a general file storage capability. It only syncs data from specific apps such as iWork. This article discusses options for cloud-based file storage: http://www.wilmut.webspace.virginmedia.com/notes/missing/inicloud3.html. I personally use Dropbox and find it extremely reliable.

LabView DAQ running more stable under Linux?

Hello,
We are doing LabView DAQ using a cDAQ9714 module (with AI card 9203 and AO card 9265) at a customer site. We are running an excutable on a Windows PC and had a couples of times (3 so far) that the PC just gone freeze for some reason and we lost all inputs and outputs. Each time it happend after the program continous run a few days. So far we have no clue why this is happening (Any idea?)
We need the program to run continously for months and years and absolutely hate the fact that it freeze. Since we couldn't find any bug in the program till now, we're thinking to blame Windows. Then alternative for us is to use Linux os. My questions are:
1. Does LabView run stable on Linux than on Windows? Any data or experience anyone has?
2. To get the same program runs on Linux, I heard I have to buy a LabView Linux delelopment tool and create the excutable from there. Does this involve any extra effort than the Windows one?
3. Does NI have any industrial PC that has Linux OS preinstalled instead of Windows? We bought one PPC 2115 before.
Thanks!
Rgds,
Harry

Harry - the main link here: http://zone.ni.com/devzone/cda/tut/p/id/6909 will show DAQmx (some Linux) and DAQmx Base (Linux/Mac) support for all of our products. It's the same table on the last link it just links a list for all of our hardware offerings. Currently there aren't any offerings with your desired I/O, we have a few multifunction DAQ devices like the USB-6218 that can be programmed with DAQmx Base in Linux. If you are looking to run stand-alone and highly stable applications you may want to look into programming an application with the LabVIEW Real-Time Module and deploy it to a RTOS (Real Time Operating System) controller. You would program the application in Windows with LabVIEW and this additional module, and then distribute the program to a controller. If you deployed to an industrial controller you can interface PCIe, USB buses etc for your DAQ instruments. We also offer this in our CompactRIO form factor where you would deploy the application to a controller/C series chassis similar to the compactDAQ you are using now in that it houses those C series modules but has much more to offer. I've put a few links below here if you would like to look into these products any further.
NI 3110: http://sine.ni.com/nips/cds/view/p/lang/en/nid/206847
NI CompactRIO: http://www.ni.com/compactrio/
NI 9074 Integrated 8 Slot Controller-Chassis: http://sine.ni.com/nips/cds/view/p/lang/en/nid/203964
Regards,
Ben N.
Applications Engineering
ni.com/support

How stable is the mac mini as a server?

Hi List,
I am planning to get the mac mini with snow leopard server.
Has anyone tried it?
How stable is the mac mini as a server?
I'd be setting it up for 10 mac clients.
It will be used as a file/print/dhcp server.
thanks.
Dp

max out the memory to reduce / eliminate paging. although you might not need to in your situation. I think printing is a light use of memory. Inkjet printers are heavy on the cpu.
electronics don't usually fail. It's the moving parts. Doesn't the mini take the 2.5 inch drives that are not as reliable as the 3.5? An external drive will get past this.
You could get an external bootable harddrive.
You need an external Firewire drive to boot a PowerPC Mac computer.
I recommend you do a google search on any external harddrive you are looking at.
I bought a low cost external drive enclosure. When I started having trouble with it, I did a google search and found a lot of complaints about the drive enclosure. I ended up buying a new drive enclosure. On my second go around, I decided to buy a drive enclosure with a good history of working with Macs. The chip set seems to be the key ingredient. The Oxford line of chips seems to be good. I got the Oxford 911.
The latest the hard drive enclosures support the newer serial ata drives. The drive and closure that I list supports only older parallel ata.
Has everything interface:
FireWire 800/400 + USB2, + eSATA 'Quad Interface'
save a little money interface:
FireWire 400 + USB 2.0
This web page lists both external harddrive types. You may need to scroll to the right to see both.
http://eshop.macsales.com/shop/firewire/1394/USB/EliteAL/eSATAFW800_FW400USB
Here is an external hd enclosure.
http://eshop.macsales.com/item/Other%20World%20Computing/MEFW91UAL1K/
Here is what one contributor recommended:
http://discussions.apple.com/message.jspa?messageID=10452917#10452917
Folks in these Mac forums recommend LaCie, OWC or G-Tech.
Here is a list of recommended drives:
http://discussions.apple.com/thread.jspa?messageID=5564509#5564509
FireWire compared to USB. You will find that FireWire 400 is faster than USB 2.0 when used for a external harddrive connection.
http://en.wikipedia.org/wiki/UniversalSerial_Bus#USB_compared_toFireWire
http://www23.tomshardware.com/storageexternal.html
Here are two utilities for making a complete backup of your internal hard drive. I've recommend using one of these so that you can create a bootable system on your external hard drive. ( PPC require a firewire connected drive. ) Once created, you can run your system from the external drive. Hold down the option key on your keyboard then power on your machine. This will bring you in startup manager click on the drive image you wish to boot then click on the arrow key to the right.
"Clone, synchronize, backup. Schedule and forget it."
http://www.bombich.com/software/ccc.html
"SuperDuper is the wildly acclaimed program that makes recovery painless, because it makes creating a fully bootable backup painless."
http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html
Robert

How stable Bangla-অঙ্কুর Phonetic Keyboard is in OS X?

I am wondering how stable Bangla-অঙ্কুর Phonetic Keyboard is in OS X? I am using OS X version 10.6.7.
Kindly share your experiences...

অন্য কি-বোর্ড থেকে অঙ্কুর একারণেই আলাদা। আমি এখন অঙ্কুরের ২য় version-এর উপর কাজ করছি। খুব তাড়াতাড়িই আমি v2 release করতে পারবো বলে আশা করছি। v3-তে ব্যবহারকারীদের এই Logical পদ্ধতি সেখানোর জন্য বেশ কিছু ব্যবস্থা নিবো বলে ঠিক করেছি। কিন্তু তার জন্য এই নতুন পদ্ধতির একজন ব্যবহার কারী দরকার যে কিনা আমাকে beta testing-এ সহায়তা করবে। সমস্যা হলো এমন লোক পাওয়া কঠিন। কারণ হলো অভ্র। আপনি যদি নতুন পদ্ধতি ব্যবহার করেন তবে আমাকে সহায়তা করলে উপকৃত হবো। এখন অবশ্য আমি কাজই শুরু করিনি।
ধন্যবাদ
রাইয়ান

How stable is Firefox 3 on the intel iMac ?

OK, the new iMac has arrived to replace the G4 that died !
My wife likes Firefox as a browser rather than Safari but how stable is Firefox 3 on the intel iMac, as my older macbook did not like it and I reverted back to Firefox 2 ?
Cheers
4jbl7

There are no issues whatsoever with Firefox on the new Intel iMac. I have had mine about a year without one issue... in fact... I have had Safari freeze up twice and never any issue with Firefox. That was one of the first apps I loaded when I got mine.
Enjoy!!!
Cheers,
Ronnie

How stable is Oracle Linux 4.5?

I have installed Oracle Linux kernel-smp-2.6.9-55.0.0.0.2.EL.
it crashes once a week. Does anyone else experience the same problem?
Upon install, installer automatically installed another kernel
kernel-hugemem-2.6.9-55.0.0.0.2.EL with only 2G of memory.
The machine runs 3 instances of Oracle 9.2.0.8 and they die from time to time also, without any error in alert log or system log.
Probably, machine is a junk, just reqular PC.
So, does anyone runs the combo for months without any problems?
Thanks.

Hi,
No log data to analyze.As you mentioned that the machine just shipped with 2G memory.It must be experienced low memory pressure.You can set vm.lower_zone_protection=100 and monitor the machine.
Regards
Terry
Message was edited by:
terry.liu

How Stable is the OSX eMail Server? Do you Use it, or have you dropped it?

We used the email server in Panther and it was crap.
Spam protection was crap, and it was somewhat insecure, so I ended up spending $1,000 a year to maintain it. We shifted over to a company called Fastmail, which is less hassel, but still $1,000 a year. I'm wondering do people use the OSX mail server for small office enviornments, and how does it work for you? Is it ready for prime-time?
Please let me know your experiences (good and bad)...

Had a good experience with Panther mail services. Better with Tiger, better still with Leopard and better again with Snow Leopard.
Your milage will vary depending on what you invest in the tools provided.
Start by understanding that the server tools provide a fairly basic configuration. To get the most out of them, you'll need to move beyond the GUI
and edit some configuration files directly. Backing them up first of course (standard practice).
Learn about the MTA provided - namely, Postfix.
By learning and understanding Postfix' configuration files and options & abilities,
you can achieve far far far better rejection of spam. Which is what you want - not to queue the junk mail and waste your server's time & resources on chomping on obvious spam.
The MDA used to be Cyrus, but as of 10.6 server that's been replaced by Dovecot which - so far - has been very good. More stable overall and better performance. As of 10.4 server there have been zero stability issues but the systems involved were typically serving about 20 users at most. Others have been using OS X Server with far more users, but you have to plan & allocate appropriate resources in terms of your server or servers.
I used to bother with custom-installing newer versions of amavisd and spamassassin but don't much anymore, I took advantage of Postfix's capabilities and between that and the zen.spamhaus.org RBL, very little spam gets through at all.
But what are your needs ? Start there. Who will support the product and what is their experience and/or understanding of servers &/or ability & willingness to learn ? Can you afford to have a novice mail/sysadmin ?
If not, what resources do you have to allocate to ensuring your mailserver is properly configured, monitored and maintained ?
If you needs are not met by what OS X Server provides, but you really want the underlying OS to be Mac OS X, then look at Kerio Connect.
If you try working with OS X Server again, then run don't walk and buy the Book of Postfix (it's on my tech bookshelf). http://www.postfix-book.com/
If you don't have it already I'd also suggest DNS & BIND (O'Reilly Press) by Cricket Liu & Paul Albitz,
Unix System Administration Handbook (now "Unix & Linux" (etc.)), Essential System Administration (O'Reilly) and while it's "only" for 10.3, be sure to invest in "Essential Mac OS X Panther Server Administration" by Michael Bartosh. There's much in there that's still appropriate and relevant in terms of understanding the architecture(s) of OS X Server and best practices in troubleshooting.

How to use Linux Print queue in client_text_io.fopen to print from Windows

We have a forms application deploed on LINUX (Oracle application server 10g).
I have to print a file from local windows PC to a linux Print Queue from forms
I have the following code
PROCEDURE file_to_printer (i_filename_output IN VARCHAR2
,i_network_printer IN VARCHAR2) IS
l_line VARCHAR2(2000);
l_fileid_output client_text_io.file_type;
l_fileid_print client_text_io.file_type;
BEGIN
l_fileid_output := client_text_io.fopen (i_filename_output,'R');
l_fileid_print := client_text_io.fopen (i_network_printer,'W');
WHILE 1 = 1 LOOP
client_text_io.get_line (l_fileid_output, l_line);
client_text_io.put_line (l_fileid_print, l_line);
END LOOP;
EXCEPTION
WHEN NO_DATA_FOUND THEN
client_text_io.fclose (l_fileid_output);
client_text_io.fclose (l_fileid_print);
END file_to_printer;
Everything works fine if I use a windows printer like \\machine\printer.
I want to use a Linux printer and specified the print queue as
\\machine\print_queue_name. It's not working
and I get error ORA-302000 on the following line
l_fileid_print := client_text_io.fopen (i_network_printer,'W');
and if I give only the queue name no error but it's not printing.
Could you please tell me how to use a Linux/Unix print queue in this situation

the simplest way is to edit the interface file (look in /etc/lp/interfaces for existing printers). Each script is
run per print job where stdin has your print data, and stdout is going to your print device. You can just
send the output to a file instead (assuming you can create a file in the windows directory from the solaris
box). If it's a network share, you could use smbclient.
-r

How stable is Linux?

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