Can multiple remote desktops control the same machine at the same time?

Can anyone please tell me if this set up possible:
mac mini running XP app
iMac logged into to control that app
ibook logged in to control that app
of course, only one person actually moving the mouse / using the keyboard at one time.
Miklos.

What I want it for is for both computers to be able to control a mac mini and the reason I want them both to be able to be logged in, is because I know at some point I"m going to go to the other end of the building, forget to log out of one, and need to use the other, and then I'll just shoot myself in the foot with the whole set up if you know what I mean. Mostly nobody else will use it just me so this is really helpful!
Miklos.

Similar Messages

Can 2 remote panels control the same VI without right-clicking to get control?

Is it possible for multiple remote panels to be able to actively interface with a single running VI without having to manually request and release control by right clicking? I am using Labview 8.2 Professional Version.
Thanks for any help.

No. Only one client can control a remote panel at a time, see LabVIEW Help ->
"Controlling an Application or Front Panel Remotely Using a Browser"
You might create a copy of that VI and provide 2 web pages as a workaround.
Regards, Guenter

HT4906 i'm using an older version of iPhoto on my desktop Mac and I can't seem to control the number of photos appearing on my iPhone and iPad, will upgrading to the newer iPhoto resolve this?

i'm using an older version of iPhoto on my desktop Mac and I can't seem to control the number of photos appearing on my iPhone and iPad, will upgrading to the newer iPhoto resolve this?

What version do you have?
iPhoto menu -> About iphoto.
What goes to your iPad/iPhone is controlled in iTunes.
Regards
TD

Can multiple threads write to the database?

I am a little confused from the statement in the documentation: "Berkeley DB Data Store does not support locking, and hence does not guarantee correct behavior if more than one thread of control is updating the database at a time."
1. Can multiple threads write to the "Simple Data Store"?
2. Considering the sample code below which writes to the DB using 5 threads - is there a possibility of data loss?
3. If the code will cause data loss, will adding DB_INIT_LOCK and/or DB_INIT_TXN in DBENV->open make any difference?
#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <db.h>
static DB *db = NULL;
static DB_ENV *dbEnv = NULL;
DWORD WINAPI th_write(LPVOID lpParam)
DBT key, data;
char key_buff[32], data_buff[32];
DWORD i;
printf("thread(%s) - start\n", lpParam);
for (i = 0; i < 200; ++i)
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
sprintf(key_buff, "K:%s", lpParam);
sprintf(data_buff, "D:%s:%8d", lpParam, i);
key.data = key_buff;
key.size = strlen(key_buff);
data.data = data_buff;
data.size = strlen(data_buff);
db->put(db, NULL, &key, &data, 0);
Sleep(5);
printf("thread(%s) - End\n", lpParam);
return 0;
int main()
db_env_create(&dbEnv, 0);
dbEnv->open(dbEnv, NULL, DB_CREATE | DB_INIT_MPOOL | DB_THREAD, 0);
db_create(&db, dbEnv, 0);
db->open(db, NULL, "test.db", NULL, DB_BTREE, DB_CREATE, 0);
CreateThread(NULL, 0, th_write, "A", 0, 0);
CreateThread(NULL, 0, th_write, "B", 0, 0);
CreateThread(NULL, 0, th_write, "B", 0, 0);
CreateThread(NULL, 0, th_write, "C", 0, 0);
th_write("C");
Sleep(2000);
}

Here some clarification about BDB Lock and Multi threads behavior
Question 1. Can multiple threads write to the "Simple Data Store"?
Answer 1.
Please Refer to http://docs.oracle.com/cd/E17076_02/html/programmer_reference/intro_products.html
A Data Store (DS) set up
(so not using an environment or using one, but without any of the DB_INIT_LOCK, DB_INIT_TXN, DB_INIT_LOG environment regions related flags specified
each corresponding to the appropriate subsystem, locking, transaction, logging)
will not guard against data corruption due to accessing the same database page and overwriting the same records, corrupting the internal structure of the database etc.
(note that in the case of the Btree, Hash and Recno access methods we lock at the database page level, only for the Queue access method we lock at record level)
So,
if You want to have multiple threads in the application writing concurrently or in parallel to the same database You need to use locking (and properly handle any potential deadlocks),
otherwise You risk corrupting the data itself or the database (its internal structure).
Of course , If You serialize at the application level the access to the database, so that no more one threads writes to the database at a time, there will be no need for locking.
But obviously this is likely not the behavior You want.
Hence, You need to use either a CDS (Concurrent Data Store) or TDS (Transactional Data Store) set up.
See the table comparing the various set ups, here: http://docs.oracle.com/cd/E17076_02/html/programmer_reference/intro_products.html
Berkeley DB Data Store
The Berkeley DB Data Store product is an embeddable, high-performance data store. This product supports multiple concurrent threads of control, including multiple processes and multiple threads of control within a process. However, Berkeley DB Data Store does not support locking, and hence does not guarantee correct behavior if more than one thread of control is updating the database at a time. The Berkeley DB Data Store is intended for use in read-only applications or applications which can guarantee no more than one thread of control updates the database at a time.
Berkeley DB Concurrent Data Store
The Berkeley DB Concurrent Data Store product adds multiple-reader, single writer capabilities to the Berkeley DB Data Store product. This product provides built-in concurrency and locking feature. Berkeley DB Concurrent Data Store is intended for applications that need support for concurrent updates to a database that is largely used for reading.
Berkeley DB Transactional Data Store
The Berkeley DB Transactional Data Store product adds support for transactions and database recovery. Berkeley DB Transactional Data Store is intended for applications that require industrial-strength database services, including excellent performance under high-concurrency workloads of read and write operations, the ability to commit or roll back multiple changes to the database at a single instant, and the guarantee that in the event of a catastrophic system or hardware failure, all committed database changes are preserved.
So, clearly DS is not a solution for this case, where multiple threads need to write simultaneously to the database.
CDS (Concurrent Data Store) provides locking features, but only for multiple-reader/single-writer scenarios. You use CDS when you specify the DB_INIT_CDB flag when opening the BDB environment: http://docs.oracle.com/cd/E17076_02/html/api_reference/C/envopen.html#envopen_DB_INIT_CDB
TDS (Transactional Data Store) provides locking features, adds complete ACID support for transactions and offers recoverability guarantees. You use TDS when you specify the DB_INIT_TXN and DB_INIT_LOG flags when opening the environment. To have locking support, you would need to also specify the DB_INIT_LOCK flag.
Now, since the requirement is to have multiple writers (multi-threaded writes to the database),
then TDS would be the way to go (CDS is useful only in single-writer scenarios, when there are no needs for recoverability).
To Summarize
The best way to have an understanding of what set up is needed, it is to answer the following questions:
- What is the data access scenario? Is it multiple writer threads? Will the writers access the database simultaneously?
- Are recoverability/data durability, atomicity of operations and data isolation important for the application? http://docs.oracle.com/cd/E17076_02/html/programmer_reference/transapp_why.html
If the answers are yes, then TDS should be used, and the environment should be opened like this:
dbEnv->open(dbEnv, ENV_HOME, DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | DB_INIT_LOG | DB_RECOVER | DB_THREAD, 0);
(where ENV_HOME is the filesystem directory where the BDB environment will be created)
Question 2. Considering the sample code below which writes to the DB using 5 threads - is there a possibility of data loss?
Answer 2.
Definitely yes, You can see data loss and/or data corruption.
You can check the behavior of your testcase in the following way
1. Run your testcase
2.After the program exits
run db_verify to verify the database (db_verify -o test.db).
You will likely see db_verify complaining, unless the thread scheduler on Windows weirdly starts each thread one after the other,
IOW no two or ore threads write to the database at the same time -- kind of serializing the writes
Question 3. If the code will cause data loss, will adding DB_INIT_LOCK and/or DB_INIT_TXN in DBENV->open make any difference?
Answer 3.
In Your case the TDS should be used, and the environment should be opened like this:
dbEnv->open(dbEnv, ENV_HOME, DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | DB_INIT_LOG | DB_RECOVER | DB_THREAD, 0);
(where ENV_HOME is the filesystem directory where the BDB environment will be created)
doing this You have proper deadlock handling in place and proper transaction usage
so
You are protected against potential data corruption/data loss.
see http://docs.oracle.com/cd/E17076_02/html/gsg_txn/C/BerkeleyDB-Core-C-Txn.pdf
Multi-threaded and Multi-process Applications
DB is designed to support multi-threaded and multi-process applications, but their usage
means you must pay careful attention to issues of concurrency. Transactions help your
application's concurrency by providing various levels of isolation for your threads of control. In
addition, DB provides mechanisms that allow you to detect and respond to deadlocks.
Isolation means that database modifications made by one transaction will not normally be
seen by readers from another transaction until the first commits its changes. Different threads
use different transaction handles, so this mechanism is normally used to provide isolation
between database operations performed by different threads.
Note that DB supports different isolation levels. For example, you can configure your
application to see uncommitted reads, which means that one transaction can see data that
has been modified but not yet committed by another transaction. Doing this might mean
your transaction reads data "dirtied" by another transaction, but which subsequently might
change before that other transaction commits its changes. On the other hand, lowering your
isolation requirements means that your application can experience improved throughput due
to reduced lock contention.
For more information on concurrency, on managing isolation levels, and on deadlock
detection, see Concurrency (page 32).

Hi Foks: How can I eliminate in Safari the short cut control 1...4 ? so that I can write these candidates in the NY Times Sudoku ? Thanks, Federico Penzo

Hi Foks: How can I eliminate in Safari the short cut control 1...4 ? so that I can write these candidates in the NY Times Sudoku ? Thanks, Federico Penzo

Do a custom install and install each version in its own program folder to use multiple Firefox versions.
* https://support.mozilla.com/kb/Custom+installation+of+Firefox+on+Windows
* https://support.mozilla.com/kb/Installing+a+previous+version+of+Firefox
Create a new profile exclusively for each Firefox version.<br />
Create a desktop shortcut with -P "profile" appended to the target to launch each Firefox version with its own profile.
See these mozillaZine KB articles for information:
* http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows
* http://kb.mozillazine.org/Shortcut_to_a_specific_profile
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
* http://kb.mozillazine.org/Opening_a_new_instance_of_Firefox_with_another_profile
* http://kb.mozillazine.org/Testing_pre-release_versions
<br />
''(in reply of a PM)''

If I were to purchase the Apple Remote Desktop with Unlimited licenses, would I be able to install the client software on each of there computers/laptops and have them remote desktop into the server?

I have several friends and family who are looking for a central place to access information from ( Pictures, home movies etc ). So I am considering setting up an OSX Lion Server. There are some other things I can use it for as well.
Here is my question:
If I were to purchase the Apple Remote Desktop with Unlimited licenses, would I be able to install the client software on each of there computers/laptops and have them remote desktop into the server? Or would I have to install the Admin software on each? Do they intend it to be used strictly as one admin to access many clients?
I always could set up a network drive so they can log in and just see the folders they have created with space on the server I provide them. But I want them to be able to log an and actually use it as a Remote Desktop.
Thanks,
Eric

Dave,
Thanks for the feedback. I understand that ARD is meant for Remote Administration, but I was not sure if it could be used for my purpose as well. The reason I was looking to do it this was was because I read several articles online about security and performance issues with setting up VNC and activating screen sharing. Unless I am misunderstood.
As far as people's activities on the server, mostly it is going to be used as a place for them to store their media. I will only allow own person ( Who I trust and I know wont botch the server ), to run applications. Everyone else will be restricted to uploading and downloading content to their designated account on the server as well as a community share on the server.
I appreciate your help.
Thanks,
Eric

I don't have a wireless keyboard or mouse for my 2007 iMac, is there any way that can use remote desktop and access it from my 2010mbp.

i don't have a wireless keyboard or mouse for my 2007 iMac, is there any way that can use remote desktop and access it from my 2010mbp

Hi champrider,
You can use an application such as Apple Remote Desktop to control your iMac remotely. See this article -
OS X Mavericks: Allow access using Apple Remote Desktop
This help page will provide you with some other useful resources for Apple Remote Desktop -
Remote Desktop Help
Thanks for using Apple Support Communities.
Best,
Brett L

HT5306 I do not want to give remote access to anyone but myself as privacy is my friend. Can this remote desktop software still be for me personally unless I allow access and for my MAC lap top only? What if I do not update? compatibility issues with wh

Hello:
Thank you for the update for remote access for desktops.
Personally, I do not want to give remote access to anyone but myself as privacy is my friend. Can this remote desktop software still be for me personally unless I allow access and for my MAC lap top only? What if I do not update? I do use this lap top in other countries. compatibility issues with what?

Apple Remote Desktop is off be default. It has to be enabled for some one to be able to remotely connect to the computer. And then, you still have to have a user name and password on the computer to remotely connect with.
If you want to see if remote access has is enabled for Apple Remote Desktop; you can find the setting in, Apple Menu, System Prefrences, Sharing. If it's enabled, Remote Management or Screen Sharing will be checked.
Beucase Apple Remote Desktop Agent is part of the Mac Operating System; even if your not using it, Apple Software Updates will from time to time offer updates for ARD Agent. Software Updates can some times be stacked ontop of each other; so chosing not to install an update, can mean other updates you may want may not be offered. At least until you install the updates those updates require. Also software updates can improve the security of your computer.

How to control the maximum time that a dynamic sql can execute

Hi,
I want to restrict the maximum time that a dynamic sql can execute in a plsql block.
If the execution is not completed, the execution should be terminated and a exception should be raised.
Please let me know, if there is any provision for the same in Oracle 10g.
I was reading about Oracle Resource Database Resource Manager, which talks about restricting the maximum time of execution for Oracle session for a user.
However I am not sure, if this can be used to control the execution of dynamic sql in a plsql block.
Please provide some pointers.
Thank you,
Warm Regards,
Navin Srivastava

navsriva wrote:
We are building a messaging framework, which is used to send time sensitive messages to boundary system.I assume this means across application/database/server boundaries? Or is the message processing fully localised in the Oracle database instance?
Every message has a time to live. if the processing of message does not occurs within the specified time, we have to rollback this processing and mark the message in error state.This is a problematic requirement.. Time is not consistent ito data processing on any platform (except real-time ones). For example, messageFoo1 has a TTL (time to live) of 1 sec. It needs to read a number of rows from a table. The mere factor of whether those rows are cached in the database buffer cache, or still residing on disk, will play a major role in execution time. Physical I/O is significantly slower that logical I/O.
As a result, with the rows on disk, messageFoo1 exceeds the 1s TTL and fails. messageFoo2 is an identical message. It now finds most of the rows that were read by messageFoo1 in the buffer cache, enabling it to complete its processing under 1s.
What is the business logic behind the fact that given this approach, messageFoo1 failed, and the identical messageFoo2 succeeded? The only difference was physical versus logical I/O. How can that influence the business validation/requirement model?
If it does, then you need to look instead at a real-time operating system and server platform. Not Windows/Linux/Unix/etc. Not Oracle/SQL-Server/DB2/etc.
TTL is also not time based in other s/w layers and processing. Take for example the traceroute and ping commands for the Internet Protocol (IP) stack. These commands send an ICMP (Internet Control Message Protocol) packet.
This packet is constructed with a TTL value too. When TTL is exceeded, the packet expires and the sender receives a notification packet to that regard.
However, this TTL is not time based, but "+hop+" based. Each server's IP stack that receives an ICMP packet as it is routed through the network, subtracts 1 from the TTL and the forwards the packet (with the new TTL value). When a server's IP stack sees that TTL is zero, it does not forward the packet (with a -1 TTL), but instead responds back to the sender with an ICMP packet informing the sender that the packet's TTL has expired.
As you can see, this is a very sensible and practical implementation of TTL. Imagine now that this is time based.. and the complexities that will be involved for the IP stack s/w to deal with it in that format.
Making exact response/execution times part of the actual functional business requirements need to be carefully considered.. as this is very unusual and typically only found in solutions implemented in real-time systems.

HT204492 my apple remote wont control the volume?? any ideas??

my apple remote wont control the volume in my itunes, any ideas??

Not via the Mac. I just hooked up a TV to mine via HDMI and it shows the It comes up with the volume logo on the screen with a line through it, when I select audio output via HDMI. If you select another audio output like internal speaker yo can change volume.

HT1338 can apple remote desktop 3 access my pc work desktop?

can apple remote desktop 3 access my pc work desktop? Do I have to get microsoft office 2011 in order to do this?

Microsoft Remote Desktop Connection Mac OS X Client (free)
<http://www.microsoft.com/mac/products/remote-desktop/default.mspx]]>
Applications -> Remote Desktop Connection
Computer: windows.pc.address
-OR-
Computer: windows.pc.address/console
Microsoft provides setup instructions on the web page where you download the RDC client.
-OR-
CoRD (Microsoft RDC Screen Sharing)
<http://www.macupdate.com/info.php/id/22770/cord>
-OR-
You could also install a VNC server on your Windows system and use a VNC client on your Mac

Can apple remote desktop be used to assist someone with cognitive disabilities to type on a computer in a different city?

Question: Can Apple Remote Desktop be used to assist someone with cognitive disability to type on an Imac in another city?

You can read about the features of Apple Remote Desktop for yourself and decide whether it would be of help:
http://www.apple.com/remotedesktop/
I can't see how it would help anyone type on a Mac, remote or not, disability or not, but perhaps you have assistance in mind that I'm not envisioning.
Regards.

I deleted some video's from iPhoto then from the trash can on iPhoto and then from the trash can on my desktop but the space has not freed up on my hard drive

I deleted some video's from iPhoto then from the trash can on iPhoto and then from the trash can on my desktop but the space has not freed up on my hard drive

Check out the following to see where your space is:
Where did my Disk Space go?
Slimming your hard drive
OmniDiskSweeper
FreeSpace
SpaceControl
FreeSpace

Setting up Airplay with my iMac so that I can see my desktop on the Apple TV

I have setup Airplay so that I can play music or videos from my iMac but how do I setup Airplay so I can see my desktop on the Apple TV? Initially, when I setup my iPad, the desktop on the iPad appeared on the TV; however, I cannot get it to do that again. How was it done in the first place and how do I get to see my desktop of my iPad and iMac on the Apple TV?

To mirror your desktop to your TV using Apple TV you need one of these Macs: iMac (Mid 2011 or newer), Mac mini (Mid 2011 or newer), MacBook Air (Mid 2011 or newer), and MacBook Pro (Early 2011 or newer). All other Macs don't support this feature.
For your iPad: Double click the Home button, scroll to the left and tip the Airplay icon.

How to control the looping time of the for loop in 10 microseconds in labview?

I need to create a +/- 9 volt square wave with period of 20us using a D/A card (Not NI card). I can write command to the card using outport provide by Labview. Right now, I can generate square wave with 4ms period which is limited by the resolution of the wait until next ms icon I used inside the for loop. Could anyone tell me how to control the execution time of the for loop to about 10 us? Your help would be much appreciated.

I'm not sure if this will hep, but this answer seems to answer this question
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=50650000000800000029410000&UCATEGORY_0=_30_%24_12_&UCATEGORY_S=0&USEARCHCONTEXT_QUESTION_0=microsecond+resolution+1ms&USEARCHCONTEXT_QUESTION_S=0

Can multiple remote desktops control the same machine at the same time?

Similar Messages

Maybe you are looking for