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Posted to users@tomcat.apache.org by Arun Kumar <mi...@gmail.com> on 2013/09/11 19:38:09 UTC
How tomcat is handling bandwidth sharing across all request
Hi
We are developing small video hosting application ,we are not writing
any special program for open the video file and send to player , simply we
are using tomcat DefaultServlet for above all video request , now we have
to benchmark our application for following scenario
1) video size 100MB (1080i HD)
2) Total Network bandwidth 10Mbps (IN/OUT)
Now how to calculate how many max thread is allowed for above scenario
,with out interrupting users viewing experience, here each video response
should secure 400kbps bandwidth for no interruption
So my question is how many concurrent users can view videos without
interrupt then how to test this scenario ,and how tomcat is handling
bandwidth sharing across the request
Regards
Arunkumar
Re: How tomcat is handling bandwidth sharing across all request
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Arun,
On 9/11/13 3:15 PM, Arun Kumar wrote:
> my native client is using http range parameter for requesting
> video
Excellent! The client is on the right track, then.
- -chris
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Re: How tomcat is handling bandwidth sharing across all request
Posted by Arun Kumar <mi...@gmail.com>.
Christopher
my native client is using http range parameter for requesting video
On Thu, Sep 12, 2013 at 12:13 AM, Arun Kumar <mi...@gmail.com> wrote:
> Hi Eli
> i think you subscribed tomcat user mailing list accidentally so please
> unsubscribe it
>
> please send empty mail to users-unsubscribe@tomcat.apache.org for To
> remove your address from the list (mail chain),
>
> Regards
> Arunkumar
>
>
> On Wed, Sep 11, 2013 at 11:31 PM, Eli <el...@yahoo.com> wrote:
>
>> To complicated
>>
>> Sent from my iPhone
>>
>> On Sep 11, 2013, at 1:58 PM, "Larry Shatzer, Jr." <la...@gmail.com>
>> wrote:
>>
>> > On Wed, Sep 11, 2013 at 11:39 AM, Eli <el...@yahoo.com> wrote:
>> >
>> >> Who can answer a question
>> >
>> > Eli,
>> >
>> > Please read http://www.catb.org/esr/faqs/smart-questions.html
>> >
>> > And from your email in another thread, if you didn't know, you are
>> > subscribed to the Tomcat Users mailing list. So only questions related
>> to
>> > Tomcat will be answered.
>> >
>> > -- Larry
>> >
>> >>
>> >>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
Re: How tomcat is handling bandwidth sharing across all request
Posted by Arun Kumar <mi...@gmail.com>.
Hi Eli
i think you subscribed tomcat user mailing list accidentally so please
unsubscribe it
please send empty mail to users-unsubscribe@tomcat.apache.org for To
remove your address from the list (mail chain),
Regards
Arunkumar
On Wed, Sep 11, 2013 at 11:31 PM, Eli <el...@yahoo.com> wrote:
> To complicated
>
> Sent from my iPhone
>
> On Sep 11, 2013, at 1:58 PM, "Larry Shatzer, Jr." <la...@gmail.com>
> wrote:
>
> > On Wed, Sep 11, 2013 at 11:39 AM, Eli <el...@yahoo.com> wrote:
> >
> >> Who can answer a question
> >
> > Eli,
> >
> > Please read http://www.catb.org/esr/faqs/smart-questions.html
> >
> > And from your email in another thread, if you didn't know, you are
> > subscribed to the Tomcat Users mailing list. So only questions related to
> > Tomcat will be answered.
> >
> > -- Larry
> >
> >>
> >>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Re: How tomcat is handling bandwidth sharing across all request
Posted by Arun Kumar <mi...@gmail.com>.
Hi *David */ Christopher
Thanks for your useful reply
So tomcat is utilizing full socket output stream capability for
corresponding threads :-)
Now i have some other querys , how many max concurrent users request is
allowed for following configuration , approximate number is enough dont
want jmeter result
Processor : i3 core with 1.7 ghz
RAM :3 GB
Tomcat Heap : 1 GB
Regards
Arunkumar
On Wed, Sep 11, 2013 at 11:31 PM, Eli <el...@yahoo.com> wrote:
> To complicated
>
> Sent from my iPhone
>
> On Sep 11, 2013, at 1:58 PM, "Larry Shatzer, Jr." <la...@gmail.com>
> wrote:
>
> > On Wed, Sep 11, 2013 at 11:39 AM, Eli <el...@yahoo.com> wrote:
> >
> >> Who can answer a question
> >
> > Eli,
> >
> > Please read http://www.catb.org/esr/faqs/smart-questions.html
> >
> > And from your email in another thread, if you didn't know, you are
> > subscribed to the Tomcat Users mailing list. So only questions related to
> > Tomcat will be answered.
> >
> > -- Larry
> >
> >>
> >>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Re: (ATTN: ELI) How tomcat is handling bandwidth sharing across all request
Posted by Eli <el...@yahoo.com>.
Ty did tht no help
Sent from my iPhone
On Sep 11, 2013, at 2:21 PM, "George S." <ge...@mhsoftware.com> wrote:
>
>
> On 9/11/13 12:17 PM, Eli wrote:
>> Can I ask a tomcat question here. I'm trying to use Tickets.com and get error message and it says tomcat with numbers after
> Sure, but this is a list for people who are using Tomcat to write software and deploy it.
>
> The best thing to do would be to take a screen shot of your browser with the error and send it to tickets.com support email.
>
> It would also be helpful to them if you could include in as much detail as possible the steps you followed to make the error happen.
>
>
>> Sent from my iPhone
>>
>> On Sep 11, 2013, at 2:16 PM, "George S." <ge...@mhsoftware.com> wrote:
>>
>>> Really, Eli, if you hadn't noticed, there are unsubscribe instructions at the bottom of the message:
>>>
>>>
>>> On 9/11/13 12:01 PM, Eli wrote:
>>>> To complicated
>>>>
>>>> Sent from my iPhone
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>>> For additional commands, e-mail: users-help@tomcat.apache.org
>>> --
>>> George Sexton
>>> MH Software, Inc.
>>> 303 438-9585
>>> http://www.mhsoftware.com/
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>> For additional commands, e-mail: users-help@tomcat.apache.org
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>
> --
> George Sexton
> MH Software, Inc.
> 303 438-9585
> http://www.mhsoftware.com/
>
>
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>
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Re: (ATTN: ELI) How tomcat is handling bandwidth sharing across
all request
Posted by "George S." <ge...@mhsoftware.com>.
On 9/11/13 12:17 PM, Eli wrote:
> Can I ask a tomcat question here. I'm trying to use Tickets.com and get error message and it says tomcat with numbers after
Sure, but this is a list for people who are using Tomcat to write
software and deploy it.
The best thing to do would be to take a screen shot of your browser with
the error and send it to tickets.com support email.
It would also be helpful to them if you could include in as much detail
as possible the steps you followed to make the error happen.
> Sent from my iPhone
>
> On Sep 11, 2013, at 2:16 PM, "George S." <ge...@mhsoftware.com> wrote:
>
>> Really, Eli, if you hadn't noticed, there are unsubscribe instructions at the bottom of the message:
>>
>>
>> On 9/11/13 12:01 PM, Eli wrote:
>>> To complicated
>>>
>>> Sent from my iPhone
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>> For additional commands, e-mail: users-help@tomcat.apache.org
>> --
>> George Sexton
>> MH Software, Inc.
>> 303 438-9585
>> http://www.mhsoftware.com/
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
--
George Sexton
MH Software, Inc.
303 438-9585
http://www.mhsoftware.com/
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Re: (ATTN: ELI) How tomcat is handling bandwidth sharing across all request
Posted by Eli <el...@yahoo.com>.
Can I ask a tomcat question here. I'm trying to use Tickets.com and get error message and it says tomcat with numbers after
Sent from my iPhone
On Sep 11, 2013, at 2:16 PM, "George S." <ge...@mhsoftware.com> wrote:
> Really, Eli, if you hadn't noticed, there are unsubscribe instructions at the bottom of the message:
>
>
> On 9/11/13 12:01 PM, Eli wrote:
>> To complicated
>>
>> Sent from my iPhone
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>
> --
> George Sexton
> MH Software, Inc.
> 303 438-9585
> http://www.mhsoftware.com/
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
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Re:(ATTN: ELI) How tomcat is handling bandwidth sharing across all
request
Posted by "George S." <ge...@mhsoftware.com>.
Really, Eli, if you hadn't noticed, there are unsubscribe instructions
at the bottom of the message:
On 9/11/13 12:01 PM, Eli wrote:
> To complicated
>
> Sent from my iPhone
>
>>>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
--
George Sexton
MH Software, Inc.
303 438-9585
http://www.mhsoftware.com/
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Re: How tomcat is handling bandwidth sharing across all request
Posted by Mark Eggers <it...@yahoo.com>.
On 9/11/2013 12:13 PM, André Warnier wrote:
> Eli wrote:
>> To complicated
> Figures.
>>
>> Sent from my iPhone
>>
> Cute, and so original.
> I haven't got one of those.
> It's Chuck's fault. Ever since he told me that his iPhone had more RAM
> than my server, I've been snubbing them.
Then I won't mention my Android.
. . . not sent from my Android
/mde/
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Re: How tomcat is handling bandwidth sharing across all request
Posted by André Warnier <aw...@ice-sa.com>.
Eli wrote:
> To complicated
Figures.
>
> Sent from my iPhone
>
Cute, and so original.
I haven't got one of those.
It's Chuck's fault. Ever since he told me that his iPhone had more RAM than my server,
I've been snubbing them.
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Re: How tomcat is handling bandwidth sharing across all request
Posted by Eli <el...@yahoo.com>.
To complicated
Sent from my iPhone
On Sep 11, 2013, at 1:58 PM, "Larry Shatzer, Jr." <la...@gmail.com> wrote:
> On Wed, Sep 11, 2013 at 11:39 AM, Eli <el...@yahoo.com> wrote:
>
>> Who can answer a question
>
> Eli,
>
> Please read http://www.catb.org/esr/faqs/smart-questions.html
>
> And from your email in another thread, if you didn't know, you are
> subscribed to the Tomcat Users mailing list. So only questions related to
> Tomcat will be answered.
>
> -- Larry
>
>>
>>
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Re: How tomcat is handling bandwidth sharing across all request
Posted by "Larry Shatzer, Jr." <la...@gmail.com>.
On Wed, Sep 11, 2013 at 11:39 AM, Eli <el...@yahoo.com> wrote:
> Who can answer a question
>
Eli,
Please read http://www.catb.org/esr/faqs/smart-questions.html
And from your email in another thread, if you didn't know, you are
subscribed to the Tomcat Users mailing list. So only questions related to
Tomcat will be answered.
-- Larry
>
>
Re: How tomcat is handling bandwidth sharing across all request
Posted by Eli <el...@yahoo.com>.
Who can answer a question
Sent from my iPhone
On Sep 11, 2013, at 1:38 PM, Arun Kumar <mi...@gmail.com> wrote:
> Hi
>
> We are developing small video hosting application ,we are not writing
> any special program for open the video file and send to player , simply we
> are using tomcat DefaultServlet for above all video request , now we have
> to benchmark our application for following scenario
>
> 1) video size 100MB (1080i HD)
> 2) Total Network bandwidth 10Mbps (IN/OUT)
>
>
> Now how to calculate how many max thread is allowed for above scenario
> ,with out interrupting users viewing experience, here each video response
> should secure 400kbps bandwidth for no interruption
>
> So my question is how many concurrent users can view videos without
> interrupt then how to test this scenario ,and how tomcat is handling
> bandwidth sharing across the request
>
> Regards
> Arunkumar
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Re: How tomcat is handling bandwidth sharing across all request
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Hash: SHA256
André,
On 9/11/13 3:41 PM, André Warnier wrote:
> Arun Kumar wrote:
>> Hi
>>
>> We are developing small video hosting application ,we are not
>> writing any special program for open the video file and send to
>> player , simply we are using tomcat DefaultServlet for above all
>> video request , now we have to benchmark our application for
>> following scenario
>>
>> 1) video size 100MB (1080i HD) 2) Total Network bandwidth 10Mbps
>> (IN/OUT)
>>
>>
>> Now how to calculate how many max thread is allowed for above
>> scenario ,with out interrupting users viewing experience, here
>> each video response should secure 400kbps bandwidth for no
>> interruption
>
> 400 Kb/s = (approx.) 0.4 Mb/s
>
> So in the theoretical very best of cases, you could possibly serve
> 10 / 0.4 = 25 clients at the same time.
>
> But of course that will never happen, because there will always be
> something else using a part of that bandwidth at any one time, or
> preventing some of the 25 threads to be serving a video file.
>
> So, realistically, count about 50% of that ?
>
>>
>> So my question is how many concurrent users can view videos
>> without interrupt then how to test this scenario ,and how tomcat
>> is handling bandwidth sharing across the request
>>
>
> Tomcat is not doing anything in terms of sharing the bandwidth
> equally between threads.
>
> Your best bet is to try this out in reality. There are a number
> of client programs available that allow you to test this and
> measure the result. This one for instance :
> http://httpd.apache.org/docs/2.2/programs/ab.html Install Apache
> httpd (any 2.x version), it comes with it free.
Better yet, launch a bunch of the actual clients against a test
service, and see how many you can run usably before things start
lagging too much. That should give you a good idea of what is
possible. Hint: you probably need more bandwidth than you think you do.
- -chris
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Re: How tomcat is handling bandwidth sharing across all request
Posted by André Warnier <aw...@ice-sa.com>.
Arun Kumar wrote:
> Hi
>
> We are developing small video hosting application ,we are not writing
> any special program for open the video file and send to player , simply we
> are using tomcat DefaultServlet for above all video request , now we have
> to benchmark our application for following scenario
>
> 1) video size 100MB (1080i HD)
> 2) Total Network bandwidth 10Mbps (IN/OUT)
>
>
> Now how to calculate how many max thread is allowed for above scenario
> ,with out interrupting users viewing experience, here each video response
> should secure 400kbps bandwidth for no interruption
400 Kb/s = (approx.) 0.4 Mb/s
So in the theoretical very best of cases, you could possibly serve 10 / 0.4 = 25 clients
at the same time.
But of course that will never happen, because there will always be something else using a
part of that bandwidth at any one time, or preventing some of the 25 threads to be serving
a video file.
So, realistically, count about 50% of that ?
>
> So my question is how many concurrent users can view videos without
> interrupt then how to test this scenario ,and how tomcat is handling
> bandwidth sharing across the request
>
Tomcat is not doing anything in terms of sharing the bandwidth equally between threads.
Your best bet is to try this out in reality. There are a number of client programs
available that allow you to test this and measure the result.
This one for instance : http://httpd.apache.org/docs/2.2/programs/ab.html
Install Apache httpd (any 2.x version), it comes with it free.
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Re: How tomcat is handling bandwidth sharing across all request
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Hash: SHA256
David,
On 9/11/13 1:48 PM, David kerber wrote:
> On 9/11/2013 1:38 PM, Arun Kumar wrote:
>> Hi
>>
>> We are developing small video hosting application ,we are not
>> writing any special program for open the video file and send to
>> player , simply we are using tomcat DefaultServlet for above all
>> video request , now we have to benchmark our application for
>> following scenario
>>
>> 1) video size 100MB (1080i HD) 2) Total Network bandwidth 10Mbps
>> (IN/OUT)
>>
>>
>> Now how to calculate how many max thread is allowed for above
>> scenario ,with out interrupting users viewing experience, here
>> each video response should secure 400kbps bandwidth for no
>> interruption
>>
>> So my question is how many concurrent users can view videos
>> without interrupt then how to test this scenario ,and how tomcat
>> is handling bandwidth sharing across the request
>
> Tomcat doesn't do any bandwidth sharing internally; that's up to
> your OS and network infrastructure. Basically divide your network
> bandwidth's slowest point (probably the ISP connection) by the 400k
> you say you need per connection. That is the number of
> simultaneous connections you should be able to support, assuming
> your server hardware can handle it (which it probably can).
There are lots of other factors to consider as well. A naive client
might download the entire movie before playing it. Disconnects might
end up higher than zero, so the client will have to tr-try and -- it
being a naive client -- might just re-start from the beginning. A
smarter client might be able to do a HEAD request to get the file size
and then use separate requests for chunks of a single file. If the
client thinks its being smart (but is really dumb), it might request
those chunks simultaneously "to improve performance".
If your 400kbps requirement per connection is well-researched and
correct, then you can handle:
(X bandwidth in kbps) / (0.7 * 400 kbps)
The 0.7 factor is a rough estimate of network "waste" chatter required
to actually communicate. For example, if you have a 100Mbps
connection, you can't actually communicate data at that speed: the
connection supports bits moving at that speed, but there is more data
flying around than the data your application cares about.
- -chris
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Re: How tomcat is handling bandwidth sharing across all request
Posted by David kerber <dc...@verizon.net>.
On 9/11/2013 1:38 PM, Arun Kumar wrote:
> Hi
>
> We are developing small video hosting application ,we are not writing
> any special program for open the video file and send to player , simply we
> are using tomcat DefaultServlet for above all video request , now we have
> to benchmark our application for following scenario
>
> 1) video size 100MB (1080i HD)
> 2) Total Network bandwidth 10Mbps (IN/OUT)
>
>
> Now how to calculate how many max thread is allowed for above scenario
> ,with out interrupting users viewing experience, here each video response
> should secure 400kbps bandwidth for no interruption
>
> So my question is how many concurrent users can view videos without
> interrupt then how to test this scenario ,and how tomcat is handling
> bandwidth sharing across the request
Tomcat doesn't do any bandwidth sharing internally; that's up to your OS
and network infrastructure. Basically divide your network bandwidth's
slowest point (probably the ISP connection) by the 400k you say you need
per connection. That is the number of simultaneous connections you
should be able to support, assuming your server hardware can handle it
(which it probably can).
>
> Regards
> Arunkumar
>
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