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Questions tagged [concurrency]

57 questions
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Simulating 1000 concurrent downloads

I'd like to simulate 1000 concurrent downloads of a single file from Cloudfront. I figured I'd setup ~10-20 xlarge EC2 instances for this. Is there an obvious way I'm missing to trigger this at the same time and get the average download time while…
Publiccert
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How do concurrent filesystems work?

From learning about how filesystems use transactions and logs to make sure that the disk is in an atomic state even after there's been a system crash, I've become curious about how filesystems deal with concurrency (and I guess this can extend to…
Kaitlyn Mcmordie
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How do i get concurrent asp.net on linux?

-edit2- It turns out asp.net (i dont know if its mono specific) blocks if the url and ip address are the same. Its nonblocking if i run it from my local machine and server at the same time. I have nginx setup using mono's fastcgi server…
user274
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postfix concurrency limit with round robin dns

Take the following internal round robin dns setup mymta.com. IN A 172.31.1.1 mymta.com. IN A 172.31.1.2 mymta.com. IN A 172.31.1.3 mymta.com. IN A 172.31.1.4 mymta.com. IN A 172.31.1.5 mymta.com. IN A 172.31.1.6 mymta.com. IN A 172.31.1.7 mymta.com.…
goose
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Limit on concurrent connections: Determined by webserver or database?

Does the webserver or is it the database that limits the number of concurrent connections?
hsym
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How two or more guest OS's hosted in a virtual environment handles editing of single resource?

I know this sounds very general question. Consider 2 OS's running using virtualization say operating system level virtualization. How concurrency is handled if both hosted OS using same resource and how this works?
pramodc84
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Where is the bottleneck?

There is a limit on connections somewhere along the line here... On a windows server 2008 machine, each request to a url running on localhost takes ~3 seconds to complete. This is fine and normal for the url. However, if i open the same localhost…
maxp
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How WordPress Server Should Be Setup For Concurrency

Recently I have a website which has a 4GB MySql database and 30,000 posts on WordPress. The average response time is 1,5 seconds without caching. I had 2 requests per second on a 4CPU / 8GB Machine and when I moved to a 32GB & 8CPU machine, nothing…
doraemon
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Varying, exclusive limits on concurrency in GitLab runner

I have a Linux server used as a GitLab runner. I'd like the server to be usable for two different purposes simultaneously: For build jobs, unit tests, etc. (things that aren't timing sensitive) many jobs can be run concurrently to take advantage of…
rsethc
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Safely update configuration file stored on NFSv3 mount

I have a configuration file config_file that is stored on an NFSv3 network mount, and I would like to update that file safely. Here are the conditions and restrictions that I'm working under: There must always be a config_file available to clients…
Ender Wiggin
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What is going on when multiple requests are made to a host?

This is a very basic question about the mechanics of computers. What are some of the common ways that a host handles multiple requests during the code execution phase for applications with millions of requests per second? For example, suppose two…
user7340
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What is the internet Bandwidth needed to support 2000 concurrent requests?

For one our projects, we need to calculate the internet bandwidth required to support 2000 concurrent requests/per second. Following is the scenario detail: If 1 user accesses the page, the response page size comes around 8 KB/Second So if we…
Urmil Mehta
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