Maximum Concurrent Connections to an Office365 Mailbox, Possible Workaround?

Hi all,I have a question regarding Office365 and a non-standard mail setup.The manager of 5 staff wants to have a single mailbox that all 6 staff will have access to.The inbox structure looks like this:Inbox
> Staff
>> Staff1
>> Staff2
>> Staff3,,,Only 1 address, [email protected], and aliases such that [email protected] will go into Staff1's folder, [email protected] goes to Staff2's folder, and so on.I've got the server-side rules and DLs doing their thing to get mail routed where it needs to, I even setup an SMTP relay for older printers and MFPs that dont support TLS, and everything was working well until I bring the account up on clients #3 and #4.I start to lose connections to the exchange server, and start getting error "Account is still authenticated to the server, but has lost the connection".So I open a ticket with MS and a...
This topic first appeared in the Spiceworks Community

No, Im not saying ACS cannot cope.
Concurrency and latency are very different things. ACS CSTacacs can handle many 100s of simple authentications/authorisations per second with users in the internal database. If 1000s of devices all send traffic in the same instant it would take some seconds to work through the backlog of traffic.
Also, worth considering that a limited number of tasks within ACS (or threads) can actually handle a much greater number of "logins" because they are generally multi-message allowing ACS to keep lots of plates spinning.
If users are in an external databases the latency (per authentication) can increase depending on where the users are (eg Windows AD) and if bad enough can have a serious effect on the overall authentication rate. At which point customers normally turn to load balancing.
If your device timeouts are 20 seconds (totally reasonable) I suggest the issue is more likely to be something else... a bug, perhaps specific to v4.2?

Similar Messages

Best SQL Challenege: TSQL Query Maximum Concurrent Connections (Participants)

Hi All,
I have a table called dbo.PhoneCalls with below columns
PhoneID |PhoneNumber| Callstarttime| CallEndtime|
1 |111-111-1111|2013-04-01 05:13:03.000|2013-04-01 05:13:03.000
1 |222-222-2222|2013-04-01 05:15:12.000|2013-04-01 05:16:52.000
2 |333-333-3333|2013-04-01 05:17:29.000|2013-04-01 05:24:08.000
2 |444-444-4444|2013-04-01 05:21:50.000|2013-04-01 05:22:31.000
2 |555-555-5555|2013-04-01 05:22:41.000|2013-04-01 05:23:11.000
2 |666-666-6666|2013-04-01 05:23:20.000|2013-04-01 05:23:46.000
1. PhoneID is nothing but the participant in the call. PhoneID = 1 is twice from above. Which means 2 particpants (Same call
)with 2 numbers with their callstarttime and callendtime. Similarly for PhoneID =2, there are 4 participants. And the list goes on for a day and then for a month.
2. For example a phone call P1 with 2 participants is going on for a particular day. We should not consider the same phone
call having 2 participants involved. So that the concurrency would be 2. We have to ignore that here.
3. Only to be considered is other Phone calls for that day. Lets say P1 having call with 2 participants, P2 having some 4 participants
which fall in the time period of P1. Then we should consider P1 and P2 the common period
4. In order to find number of concurrent calls happened for a day basing on callstarttime and callendtime. What would be the
query?
5. Should consider the Timeperiod or the bucket with 1 hour as the period.
6. A Phone Call P1, Phone Call P2, should have matching (common) time ( keeping all the scenarios) is required for this query.
Result for Concurrent calls for a day should be like below. Should get all the concurrent connections happened for a particular
day.
Date|TimePeriod/Bucket(hr part)|Concurrentconnections|
Jan-01-2015|01 to 02|3
Jan-01-2015|11 to 12|2
Jan-02-2015|04 to 05|5
Jan-02-2015|12 to 13|13
ii) So once the above is achieved.
Have to find the Maximum concurrent connections for day from the above.
For below Maximum Concurrent connections are '3'
Date|TimePeriod/Bucket(hr part)|Concurrentconnections|
Jan-01-2015|01 to 02|3
Jan-01-2015|11 to 12|2
Hence the Result for Maximum Concurrent Connections would be
Date|TimePeriod/Bucket(hr part)|MaxConcurrentconnections|
Jan-01-2015|01 to 02|3
Jan-02-2015|12 to 13|13

Thanks George.
That was fantastic.
But
But I don't want the participants to be concurrent in the same call. And should consider the different call.
Lets say Phone Call P1 having 2 participants , obviously they are concurrent according to that call.
Only the Phone calls with more than one participant should match with other phone call with more than one participant.
A Phone call with any number of participants not matching with the time slot of other phone call should be ignored.
There might be a different call say P2, having some 3 participants at the same time or atleast fall in P1's time slot.
So
P1 --> 2 participants ---> start hour 10:00am ; End Hour 12:00pm
P2 --> 3 participants ---> start hour 10:30am ; End hour 12:30 pm
P3 --> 4 participants ----> start hour 11:00am ; End hour 11:10am
So the concurrency should ignore for P1 and should consider for P2 and P3. From above P2 having 3 participants, P3 having 4 participants. So the common time for all P1,P2,P3 is 11:00am - 11:10am.
Concurrency should be
Starthour EndHour ConConnections
10:00am 11:00am (2+3+4) ---> 2 for P1, 3 for P2, 4 for P3, because at exactly 11:00am there are 4 participants. So the time bucket or the slab for 1 hour will give us that concurrency at that particular slab. Except that independent
participants to that call.
So Result should be
Start Hour End Hour Concurrent Connections
10:00am 11:00am 9
11:00am 12:00pm 9
12:00pm 01:00pm 5

Anybody know the maximum channel, concurrent connection limit

Anybody know the maximum channel that can be set and the maximum concurrent connection that listener can support for WebSphere 6.0 Solaris.
One more question, please correct if I'm wrong; in order to set above value, I have to modify qm.ini as below:
TCP:
Port=1414
KeepAlive=YES
ListenerBacklog=800 --------> for maximum concurrent connection that listener supports
Channels:
MaxChannels=1000 ----------> for maximum channel for QManager
MaxActiveChannels=1000
Every suggestions would be appreciated.

Not really sure what you mean by "half-closing" and the question you're asking. Can you clarify?

Maximum number of concurrent connections using java sockets

How can we find out the maximum number of concurrent connections that can be handled by a pooled connection server?
I have a pooled server which creates a predefined number of handlers. Upon receiving a new request it accepts the connection and sends it to one of the handler.
The solution works well for low number of concurrent connections - < 50 or 100
But as the number increases there seems to be an issue
1. Ignoring request even if i increase the handlers
2. Increase in delay. [I feel that the listening thread is not getting the time slice to go read the socket for new requests]
Any idea as to how i can solve this?
Would an NIO socket help [am using the conventional java.io Serversocket, because my clients may not be non-blocking]??
Any help would be appreciated.
Anp

There is no set maximum, but it is in the thousands on most platforms. I have a production server that handles tens of thousands of connections simultaneously. Most likely you have a bug in your code.

Adobe media server stand and adobe meidia server pro Maximum number of concurrent connections ?

adobe media server stand and adobe meidia server pro Maximum number of concurrent connections ?

Petro - you are alive - good news. Can you please contact Matt or I please, we'd be grateful mate - thanks - gavin

Maximum concurrent vod and live connections

How to check maximum concurrent vod and live connections for a server could afford?
What factors will be depended? For internal use, the NIC should be 1G port.
How I will know that the maximum capacity for the server had been reached?

I have already read the white paper from http://www.adobe.com/content/dam/Adobe/en/products/ams/pdfs/ams5-intro-wp.pdf.
When to choose HDS are:
Examples of use cases for HTTP Dynamic Streaming include the following:
• Adaptive streaming behind restrictive firewalls
• Massive-scale live broadcasting
• Enhanced seeking over standard HTTP connections
• Enterprise streaming on existing network infrastructure
On other hand, as in-house deployment without firewall and also could allow port 1936 inside internal network. So above benefits seem not significant.
So other than above reasons, how RTMP and HTTP will be differed in performance and others?

Maximum concurrent call connections for our Call Manager v7.15

Hi everyone,
Hope you can help! I was just asked one question I should have known how to answer...
We are using CM 7.15. Have 1 publisher and 1 subscriber. We have 2 pri T1 (24 slots). One connects to 1 2821 Voice gateway and another one is connection to another 2821 voice gateway in another location. I do not think we use SIP trunk...but I am not sure if we are using mpcp or H323.... so how do I check which protocol I use?
The most important question is... I would like to ask how I can find out what the maximum concurrent sessions of the call connections are? How do I find it out?
Please help...thank you very much for your help.
Takumi

Hi Bobson Lam,
in CUCM Administration > Device > Gateway, you have a list of configured Gateways ... in this list there is a column called 'Device Type', this column shows the 'H.323 Gateway' or the Gateway Model (for ex.: 2821) if it's MGCP.
For Maximum Concurrent Sessions ... have you try RTMT (CUCM Administration > Administrations > Plugin > RTMT for Windows)? There are some System - Performance, that shows, for example, Call Active for H.323.
Hope this helps.

Exchange liscences, per mailbox or per concurrent connections

can anyone confirm, ideally with evidence via a microsoft link, as to whether exchange 2010 server client access liscences are per user, or per mailbox, i.e. if you have 300 mailboxes, you need 300 cals, whereas if you only have 150 concurrent connections
to the mailbox server at any one time, you only need 150 cals.
Also if its per mailbox, what are the rules on ex employee mailboxes, that are sat on the mailbox server, but not being actively accessed. Do they still require a CAL, or can they be flagged as disconnected or something?

Hi,
A user with multiple mailboxes requires only one CAL. In contrast, if multiple users access the same mailbox, each user needs his or her own CAL, unless the user is accessing that mailbox from a single device licensed with a Device CAL.
A better explanation is provided here:
http://www.microsoft.com/en-in/licensing/about-licensing/client-access-license.aspx
Regards from ExchangeOnline.in|Windows Administrator Area | Skype:[email protected]

Max concurrent connections

Coming back to a topic that was posted a few months ago with
an
additional question:
>I believe you mean to ask, "What is the maximum number of
>concurrent connections such as those used in loadMovie or
XML.load?"
>If this is what you're asking then there are no current
limits. However,
>the sending server may limit concurrent connections for a
single client
>to any number so the loads may fail if they exceed this
limit. The
>limitations are therefore server-based, not Flash based,
and they will
>differ from server to server.
My question:
While Flash doesn't enforce a limit, do any/all browsers
enforce
limits? If I wanted to load up 50, 100, 200 movies at once,
where if
anywhere would I be limited?
Also, it seems that, in a test program loading a bunch of
images from a server concurrently, I am not able to get more than
two at once. Is this purely a server issue?
-andy

Hi,
I imagine it does.
Also I guess if we are talking about just some random UDP traffic it would also mean that the default timeout for a connection would be 2min. The most usual UDP traffic would probably be DNS querys. In those cases I presume though that the UDP connections dont stay on firewall for long as long as the firewall sees the DNS reply.
But as I said if we are talking about some random UDP traffic that is allowed through the firewall I would guess it stays in the connection table of the firewall for a couple of minutes. So you might be looking at 1000 concurrent connections or even more?
I have once witnessed a single server sending so much UDP traffic that it reached the connection limit of an ASA5540 which is 400 000 concurrent connections.
- Jouni

Channel has reached maximum concurrency (5,000 concurrent messages)

Hi Experts,
I have executed a scenario: IDocs to AS400 (JDBC Adapter). Some IDocs were processed succesfully but some are giving the following error.
"com.sap.aii.af.ra.ms.api.RecoverableException: Channel has reached maximum concurrency (5,000 concurrent messages) and no free resource found within 5,000 milliseconds; increase the maximum concurrency level"
Can any one faced this problem? Please do needful...
Regards,
Ramesh.

Hi,
This error occurs when the channel has only few (minimum 1) resources in the pool(to connect the DB in parallel) and the messages load to that channel is high. Hence, channel will reach to maximum concurrency( minimum 1, by default). In this case, you can increase this maximum concurrency value to higher value (could be 3 to 5) and check whether the issue is happening still.
Hope this feature implementation will solve your problem.
Regards,
Soorya

50000 concurrent connection

Do you know if weblogic application server can handle 50K concurrent connection? I have to make the decision if it is possible to use weblogic application server to do. If so, how many servers do i need (just an estimation is ok).

We are in production with a similar configuration (as of Feb 1).
We have two outstanding issues
1. Multicast DOES NOT WORK when dual NICs used/enabled
2. Testing using as few as 25 users (via webload, RSW and Loadrunner) causes
failures and timeouts.
The same test on a single server (cluster of 1) works fine!
App Servers
NT 4, sp6a
5 dual 650 IBM Netfinity 4000R w/512 mb
WLS 5.10 sp8
Web Servers
NT 4, sp6a
2 dual 650 IBM Netfinity 4000R w/512 mb
IIS proxy
cisco local director in front of web servers.
Michael Girdley wrote:
Sure. We regularly run benchmarks that include 10,000 simultaneous
connections. To do so, we use a cluster of 10 400 MHz CPUs running Windows
NT.
Michael Girdley, BEA Systems Inc
Learning WebLogic? Buy the book.
http://www.learnweblogic.com/
"kc" <[email protected]> wrote in message
news:3a63f01d$[email protected]..
Do you know if weblogic application server can handle 50K concurrentconnection? I have to make the decision if it is possible to use weblogic
application server to do. If so, how many servers do i need (just an
estimation is ok).--
/\/\i|<e
Mike Kincer
Solutions Developer/Engineer
Atlas Commerce "ebusiness evolved"
Office phone: +1-607-741-9988
mailto:[email protected] [http://www.atlascommerce.com]

Important 50K concurrent connection

Do you know if weblogic application server can handle 50K concurrent connection? I have to make the decision if it is possible to use weblogic application server to do. If so, how many servers do i need (just an estimation is ok).
Please let me know the answer

This is very true, and often overlooked. What are you using in your
application? I'm working on a project that is using EJBs, JSP, servlets, XML
and XSL and very, very dynamic content.
The xsl transforms alone were probably our biggest performance hit. We've
since moved them to an external servlet engine (Caucho's Resin) to take some
of the burden off of our WL servers, and performance, and especially
scalability, have increased immensely.
How dynamic is your application? How many queries are there going to be per
served page? What kind of transform/building of each page is necessary?
These are all factors that are going to impact your speed and scalability
long before 50k users hit your site.
Thanks,
John Stotler
"Robert Patrick" <[email protected]> wrote in message
news:[email protected]...
BEA has people that can help you estimate the amount of hardware required.However, any estimate is very dependent on the application. Personally, I
recommend that you (with or without help from BEA) do a little stress
testing of the application to get a feel for how well it scales on a single
JVM. Once
you get a feel for this, it will be easier to get a more realisticestimate that we (BEA and you) can be comfortable with. If you want some
help with this, please talk to your BEA Account Representative about this.
>
Robert
kc wrote:
The client is a combination of Java applet (80%)(socket connection) and
HTTP connection (20%). There will be 10 transactions on the database for
each user per minute. 1 user will fire up 5 requests per minutes and each
request approximate 2 database transactions. There are 50K user connect
concurrently.
>>
Robert Patrick <[email protected]> wrote:
What I meant by traffic was how many requests per period of time do you
expect these users to make (10 per minute seems high since user think time
is generally more than 6 seconds). How much work does each request do
(i.e., how long
does the request take)? Are these web clients or Java applicationclients?
>>>
These are just a few of the things that you will need before trying toestimate the hardware required.
>>>
kc wrote:
What do you mean by traffic? One user will access the database by 10
transactions per minute. Is it help to estimate?
>>>>
Robert Patrick <[email protected]> wrote:
Yes, it can. How many servers you need is probably more dependent
on the traffic these users are generating than the number of users...
>>>>>
kc wrote:
Do you know if weblogic application server can handle 50K
concurrent connection? I have to make the decision if it is possible to use
weblogic application server to do. If so, how many servers do i need (just
an estimation is ok).
>>>>>>
Please let me know the answer

2000 concurrent connections

Hello,
Does Oracle support 2000 concurrent connections? What are the potential problems/bottlenecks? Memory (how much is required), network (TCP/IP), SQL*NET, etc...
Oracle states that shared server connection require less memory and permits greater scalability. Is it worth the extra configuration? How much memory is saved?
The OS can be Windows or Unix. Of course we are talking about 64 bit here.
Is there any documentation concerning this matter?
Thanks,
Mark

Thanks. Great post by Howard for resuming shared server vs. dedicated connection.
Concerning shared server connections and length of transactions: It is difficult to say what the length of our transactions are as I don't have any figures, all I can say is that we always ask developers to keep transactions as short as possible.
Does anyone have this type of implementation in production? I would still like to know of any other possible caveats or limitations.
Thanks,
Mark T.

Outlook Anywhere concurrent access to a single mailbox

Hi , we have a customer that fo some particular reason have 17 device ( PC ) who need to have outlook configured on the same exchange account ( I know we tried to talk him out of it but to no avail ) , the problem we are facing is that only the first Computer
can connect succesfully and then the remeaing device are unable to connect to Exchange ( disconnected from exchange ) . Basically is a first came first serve. I have already created a Throttling policy for these users and set RCAMaxConcurrent to Unlimited
but even this did not solve my issue. I am sure I am hitting some limit imposed from the exchange server but have no clue which one
Thanks

Hi ,
Thank you for your question.
we could create a new throttling policy to apply this specific mailbox:
New-ThrottlingPolicy –name <Name>
Set-ThrottlingPolicy –identity <Name> –RCAMaxConcurrency <Value>
Set-Mailbox –Identity “Username” –ThrottlingPolicy <Name>
Notice: The RcaMaxConcurrency parameter specifies how many concurrent connections an RPC Client Access user can have against a server running Exchange 2013 at one time. A connection is held from the moment a request is received until
the connection is closed or the connection is otherwise disconnected (for example, if the user goes offline). If users attempt to make more concurrent requests than their policy allows, the new connection attempt fails. However, the existing connections remain
valid. The RcaMaxConcurrency parameter has a valid range from 0 through 2147483647 inclusive. The default value is 20. To indicate that the number of concurrent connections should be unthrottled (no limit), this value should be set to $null.
We could refer to the following link:
https://technet.microsoft.com/en-us/library/dd298094(v=exchg.150).aspx
If there are any questions regarding this issue, please be free to let me know.
Best Regard,
Jim

Difference between maximum concurrency and batch mode in JDBC

Hi All,
Could som one tell me the difference between maximum concurrency and batch mode in receiver JDBC adapter?
Regards,
XIer

Hi,
The Max Concurrancy and Batch mode are used for performance tunning for JDBC adapter.
Max Concurrancy is possible upto 5 only. so even if you will be taking up 10 it will by-default take 5.
The number of records being processed depend on the size of each record. for e.g Per minit XI Is Processing 50 Records,It will Take lot of time to process all Records.
So if you set Max concurrancy as 5 then at time 5 messages will be processed simultaneously.
In Batch mode it will, collect the multiple SQL statements that will be created for records to be processed and processed at a time. It will improve performance considerably.
But Batch Mode is possible with only INSERT, UPDATE, DELETE etc.
The Stored procedures can be executed with max concurrency
Thus it completely depends that on the no of records to be processed at a time and volume of Mesasges.
Thanks
Swarup

Maximum Concurrent Connections to an Office365 Mailbox, Possible Workaround?

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