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I need to use a cryptographic hash function for security and message integrity purposes in resource constrained devices like tmote sky or z1 mote. I am using cooja simulator in contiki.
I tried to use quark or blake2. But Section TEXT will not fit in region ROM. I am sure the rest of the code is minimal with respect to memory requirement. So I need to use a still more lightweight hash function.
Using too much memory is causing the issue. For example, in case of quark these lines demand too much memory to be allocated.
Do you know of any hash function lightweight enough to fit on the motes?
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Can you explain the different features among alpha, beta and stable in kubernetes?
And I also want to know what the General Availability ( a.k.a GA ).
Thank a lot!!
Alpha means the feature is disabled by default and may change wildly before it exits alpha. Beta means on by default, stable for most use, but still might change before GA. GA means the feature will not change in backwards incompatible ways and has the full trust of the project behind it.
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I'm doing a project where I need to analyze the differences between functional programming and imperative programming. I'm using Scala since it's a multi-paradigm language, for a fair comparison.
Using languages that have a front-end on gcc, pin and perf(hardware) are suitable tools to do these comparisons, but now on Scala, I'm not finding substitutes.
I'm not interested on microbenchmark that only observe the time it took to run the algorithm. Since it's a conway's game of life implementation, a number of memory access is required and so on. I'm grateful for any help
I would recommend ScalaMeter. It is a microbenchmarking tool, but it does what you want by running the code multiple times, and removing the effects of JIT compiler warm-up, garbage collection, etc. It can also be configured to report memory usage, etc.
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Is there a document or refference we can look at to dimension how many databases would be the recommended maximum based on the Tier type
e.g.:
db-n1-standard-1
1vCPU, 3.75 GB
or
db-n1-standard-2
2vCPU, 7.5 GB
Number of databases is not a good indicator for choosing your tier.
You can have an instance with a 100 databases with little activity on a small instance, a single large database that needs a lot of memory and so forth.
You need to take into consideration how big you expect each database to be, how much data you expect to be kept in the cache, how many read/write queries you expect to be handling and so on.
The usual recommendation is to run load tests using your expected workloads and determine the machine requirements based on that.
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Anyone know of good examples for the presentation of Extended Backus-Naur Form for electronic media (i.e. HTML)?
I am looking for suggestions about form, not content -- I'm looking to make it as readable as possible, so that rules, terminals, and EBNF symbols are easily distinguished from each other.
Not sure if this is what you mean (or whether it's way too late), but I've been playing with this visualisation tool:
http://www-cgi.uni-regensburg.de/~brf09510/syntax.html
At the moment it appears to only support png output, and it's not that pretty. Otherwise I have had recommended to me (untried, YMMV) Graphviz.
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What have others used when a customer wants a particular feature and they have required a signed document detailing the feature and expectations for that feature? Are there any 'engineering change forms' available to use?
We are going to move towards this with our customers to reduce confusion and meet the customer's overall expectation during the requirements process. Email communication is too disjointed and has led to miscommunication during delivery.
I'd suggest to just make it up as you go along. As you allude to, anything on paper is going to be better than what you have with email now.
As long as you include a description of the feature, the impact it will have on the schedule, a date, and a dotted line to sign on then that should be enough information.
In fact making it too long and involved will make you wish for the simplicity of just a plain email trail ;-)