[SOLVED] Daemons Array Question
Two questions, actually:
1) When I installed wicd, the Arch Wiki told me to disable the network daemon with "!network". What is the difference between using the exclamation mark and just removing the word "network" from the array?
2) From what I can tell, netfs is used to access files on a network, like a LAN, correct? If I don't use that functionality on my laptop, is there any reason to keep this daemon at all? (i.e. does it have any effect on my internet access?)
Last edited by dfetter88 (2010-06-15 03:32:50)
1) When I installed wicd, the Arch Wiki told me to disable the network daemon with "!network". What is the difference between using the exclamation mark and just removing the word "network" from the array?
Nothing really.
2) From what I can tell, netfs is used to access files on a network, like a LAN, correct? If I don't use that functionality on my laptop, is there any reason to keep this daemon at all? (i.e. does it have any effect on my internet access?)
That's right. It will mount the network locations from your /etc/fstab
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How do i add the "hal" daemon to the DAEMONS array in /etc/rc.conf?
I know how to get into the editor for /etc/rc.conf , but what exactly do i type to add "hal" to the array?
Gowireless - please, use some common sense when reading the documentation.
DAEMONS Section
This array simply lists the names of those scripts contained in /etc/rc.d/ which are to be started during the boot process, and the order in which they start. Asynchronous initialization by backgrounding is also supported and useful for speeding up boot.
DAEMONS=(network @syslog-ng netfs @crond)
I dunno, maybe putting in hal into the DAEMONS array would work?
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Right now the only line left I am using in my rc.conf is:
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But is it a reasonable Daemons array?If you need a daemon after booting the system, add it to the array. If a daemon requires another daemon, put it after the dependency. If a daemon does neither depend on anything like other daemons or network, put it in the and and write @daemonname to start it in the background. My other rules of thumb used to be: start syslog early, start dbus early.
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Does anyone how to solve this Javabat question?
Here is the link:
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Rc.conf deamons array - question
i have a question about the deamon array in rc.conf, this is mine:
DAEMONS=(preload syslog-ng dbus acpid netfs alsa crond hal acpi-support fam stbd wicd gpm cups samba asusoled-clockd bluetooth transmissiond sshd)
i know there is an order for some things, i just dont know what, so my question, is my order ok? if not what do i need to switch?
thanksadamruss wrote:
Inxsible wrote:
adamruss wrote:
i have a question about the deamon array in rc.conf, this is mine:
DAEMONS=(preload syslog-ng dbus acpid netfs alsa crond hal acpi-support fam stbd wicd gpm cups samba asusoled-clockd bluetooth transmissiond sshd)
i know there is an order for some things, i just dont know what, so my question, is my order ok? if not what do i need to switch?
thanks
As long as the daemons are independent of each other, it hardly matters what order they are started in. The only thing is that the syslog-ng is used for logging...so you always want to start that before anything else so that in case there are errors in starting any daemon, they will logged and you can see them later.
I am not sure what 'preload' daemon is. Also you might want to start the unimportant ones in the background by prefixing them with an '@' sign so that your boot up would be quicker.
what do you mean unimportant?
You could bacground "alsa gpm cups samba bluetooth".
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I had a recent application where I wanted to take 100 samples of something then get the RMS of the dara. This happens in a loop and until program ends. Very basic stuff.
QUEUE Method:
Obtain Queue with 100 elements max.
Enqueue data (data arrives about every 50mS).
Get Queue Status, when Number of Elements is 100....
... Flush Queue and get all elements (that'll be an aray of course) and use RMS funtion.
Repeat
ARRAY Method:
Initialize Array with 100 elements of the DBL 9999.99 (that's a value that can't occur in the data)
Insert data into the array by using Replace Array Subset
When index 100 is not 9999.99, then....
... Put array in the RMS function, then re-initialize array full of 9999.99
Repeat
So my questions are, which should be Faster, which one better Memory Management ?
Thanks!
Solved!
Go to Solution.LV_Addict wrote:
I had a recent application where I wanted to take 100 samples of something then get the RMS of the dara. This happens in a loop and until program ends. Very basic stuff.
QUEUE Method:
Obtain Queue with 100 elements max.
Enqueue data (data arrives about every 50mS).
Get Queue Status, when Number of Elements is 100....
... Flush Queue and get all elements (that'll be an aray of course) and use RMS funtion.
Repeat
ARRAY Method:
Initialize Array with 100 elements of the DBL 9999.99 (that's a value that can't occur in the data)
Insert data into the array by using Replace Array Subset
When index 100 is not 9999.99, then....
... Put array in the RMS function, then re-initialize array full of 9999.99
Repeat
So my questions are, which should be Faster, which one better Memory Management ?
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Queues can pass data "inplace" by just moving the pointer to the data buffer to who ever want to read the queue.
The array method you outlined requires repeatedly peeking in at the data buffer to decide what you need to do plus you have to over-write the buffer with you special "code".
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
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Trying to send multiple types in a byte array -- questions?
Hi,
I have a question which I would really appreciate any help on.
I am trying to send a byte array, that contains multiple types using a UDP app. and then receive it on the other end.
So far I have been able to do this using the following code. Please note that I create a new String, Float or Double object to be able to correctly send and receive. Here is the code:
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oos.writeObject(nbr3);
oos.close();
byte[] buffer = baos.toByteArray();
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nbr3 = (Float) ois.readObject();
My main question here is that I have to create a new Float and Double object to be able to send and receive this byte array correctly. However, I would like to be able to have to only create 1object, stuff it with the String, int, Float and Double, send it and then correctly receive it on the other end.
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However on the receiving side, I am not sure how to be able to correctly retrieve the 4 types. Before I was explicitely creating those objects for sending, then I was casting them again on the receiving side to retrieve then and it does work.
But if I create a O_struct object and cast it as I did before with the indiv objects on the receiving end, I can't get the correct retrievals.
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My main goal is to be able to send 4 types in a byte array, but the way I have written this code, I have to create a Float and Double obj to be able to send and receive correctly. I would rather not have to directly create these objects, but instead be able to stuff all 4 types into a byte array and then send it and correctly be able to retrieve all the info on the receiver's side.
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If there an easier way to do I certainly will appreciate that advise as well.
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I will be sending 1000s of these byte arrays, and I'm sure having to create a new Double or Float on both ends will hinder this.
I am worried that having to create new objs every time it is sending a byte array will affect my application.
That's the wrong way to approach this. You're talking about adding complexity to your code and fuglifying it because you think it might improve performance. But you don't know if it will, or by how much, or even if it needs to be improved.
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It looks like you are embarking on a very interesting project. Although you probably have seen many of the following documents, I've linked a few to get you started.
Discussion forum using LabVIEW to read from tables
Developer Zone article about developing a test system
Knowledgebase article about imitations of speed with database toolset
As far as your first question, I would suggest trying out both methods with simple code and testing with a small amount of values to determine which one will be the fastest.
Good luck with your project!
Amanda Howard
Americas Services and Support Recruiting Manager
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Hi, everyone.
I'm writing a lab program which counts the number of occurances of English letters in a line of English text.
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Assume that we input only lowercase English text
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The length of this 2-dimensional array is 3.
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system.out.print(table [t] [i] + � �; } system.out.println();
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Name of String var passed to a for loop? Array question
I have a series of String variables named q1String where 1 can be replaced by a value from 1 to 17.
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Can anyone help me solve this?
Regards,
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for (var i=1;i<18;i++){
var newQStringArray:Array = new Array("q",i,"String");
var question_caption_mc:Question_caption_mc = new Question_caption_mc;
var tempArray=newQStringArray;
var tempString=tempArray.join("");
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trace(tempString);
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Last edited by czechman86 (2008-05-30 02:36:59)funkyou wrote:Do you have the appropriate language package for aspell installed? (example: aspell-de for german)
i checked and i did not have the en package. thank you for that tip! the spelling in kopete will still not work however.
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