Have an app with 200K+ users. Around 1M monthly requests, 20 requests per minute. Mostly for downloading images. What server size do I need? Just need an idea of RAM and Processor. There are around 10K unique images (~2MB). Storage is not a problem because 10GB is more than enough. Right now its been hosted on a Back4app Parse server but the there's a request limit and the user base is growing rapidly. Hence the need to move to other servers. Please don't suggest Firebase or other alternatives. Just need a basic idea.
This is a  about  Related:      I have a question regarding capacity planning. Can the Server Fault community please help with the following:   What kind of server do I need to handle some number of users? How many users can a server with some specifications handle? Will some server configuration be fast enough for my use case? I'm building a social networking site: what kind of hardware do I need? How much bandwidth do I need for some project? How much bandwidth will some number of users use in some application?
Persistent do not disturb toggle in Yosemite possible? How to split a string with any whitespace chars as delimiters I know that there is a simple way to shutdown the computer in command prompt, but is it possible to do system updates and then shutdown the computer in command prompt?   For example, when Vista needs to install updates, it will let me install them and shut down by clicking the Shut Down button (while relegating the normal shut down button into the menu). So is there a command to do this in command prompt? Do I need a UK visa? How and where to apply? I live in Germany since May 2013 as a spouse of German citizen. In Nov 2015 we divorced and I have German residence permit till Jan 2018. We have a son in this marriage and legally I have the right to live in Germany indefinitely. I would like to visit my brother and sister who are British citizens living in UK. What is the visa procedure for me to travel to UK for a week.  Do I need a visa to enter UK ? "Where" exactly are complex numbers used "in the real world"? Which annotation should I use: @IdClass or @EmbeddedId The JPA (Java Persistence API) specification has 2 different ways to specify entity composite keys: @IdClass and @EmbeddedId.   I'm using both annotations on my mapped entities, but it turns out to be a big mess to people who aren't very familiar with JPA.   I want to adopt only one way to specify composite keys. Which one is really the best? Why? How do you perform a left outer join using linq extension methods Assuming I have a left outer join as such:  from f in Foo join b in Bar on f.Foo_Id equals b.Foo_Id into g from result in g.DefaultIfEmpty() select new { Foo = f, Bar = result }   How would I express the same task using extension methods? E.g.  Foo.GroupJoin(Bar, f =&gt; f.Foo_Id, b =&gt; b.Foo_Id, (f,b) =&gt; ???)     .Select(???) In swimming, is there a competitive advantage to being in one lane or another? Upon observing swimming competitions in the Olympics, it is not clear to me whether one of the eight lanes is more advantageous versus another. I've seen vague claims but nothing backed up with science.  In competitive swimming, is there an advantage to being in one lane or another? Furthermore, does the stroke (ie: breast, fly, freestyle, etc.) affect this effect? Resize Move Partitions on Dual Boot System $f$ is surjective iff it has a right inverse: using the axiom of choice and errors in ProofWiki Converse of Schur's Lemma in finite dimensional vector spaces I am trying to prove (or disprove) the converse of Schur's Lemma in finite dimensional vector spaces. I am not sure if it holds in this case, but I have tried to apply the idea that proves it in representation theory (see for example Theorem 4.3  that uses Maschke's theorem or in questions  and ).  The converse of Schur's Lemma in finite dimensional vector spaces is:     Let $V$ be a finite dimensional vector space over the complex numbers. Let $S$ be a set of endomorphisms of $V$ and assume that every endomorphism $A$ of $V$ such that $$AB=BA\text{ for all }B\in S$$ is of the form $\lambda I, \ \lambda\in\mathbb{C}$. Then $V$ is a simple $S$-space.   (*an endomorphism of $V$ is a linear operator from $V$ to $V$  *$V$ is a simple $S$-space if the only $S$-invariant subspaces of $V$ are $V$ itself and the zero subspace)  What I've tried so far:  Assume to the contrary that $V$ is not a simple $S-$space. Then, there exists a subspace $W$ of $V$ such that $W\not =\{0\}$, $W\not= V$ and $W$ is $S$-invariant. Let $W'=V\setminus W$. Then, since $V$ is finite, we can easily prove that $V=W\oplus W'$ (this is my attempt to translate Maschke's theorem in vector spaces). Consequently, for every $v\in V$, there exists unique $w\in W$ and $w'\in W'$, such that $v=w+w'$. Define the projection $P:V\rightarrow V$ by $Pv=w$ for every $v\in V$.   What is left to prove is that $PB=BP$ for all $B\in S$. Then $P$ is clearly not a scalar and thus we have the contradiction we are looking for.  There is a difficulty in showing that $PB=BP$ for all $B\in S$, because $W'$ might be $S$-invariant or not. More precisely:   Let $v\in V=W\oplus W'$ and $v\not =0_V$.  If $v\in W$ then $Bv\in W$ because $W$ is $S$-invariant, therefore: $PBv=Bv$ and $BPv=Bv$.  If $v\in W'$ then $Pv=0$, hence $BPv=B\cdot 0=0$, and  (i) if $Bv\in W'$ then $PBv=0$.  (ii) if $Bv\in W$ then $PBv=Bv$ and this is where the problem occurs.  Any hints, ideas or counterexamples would be very helpful. How can I render an object with an hdr background? I have an object with an hdr for the background. What do I do in Cycles to render the background with my object?  How is this different from an ordinary render in Cycles?  The hdr is a big one, 350MB. This is a somewhat bizarre question. My objectives are to understand the language design decision and to identify the possibilities of reflection in C++.   Why C++ language committee did not go towards implementing reflection in the language? Is reflection too difficult in a language that does not run on a virtual machine (like java)? If one were to implement reflection for C++, what will be the challenges?   I guess the uses of reflection are well-known: editors can be more easily written, program code will be smaller, mocks can be generated for unit tests and so on. But it would be great if you could comment on uses of reflection too. I know we can use both Present Simple and Present Continuous to describe future actions. But I don't know when to use the correct form.   For example:  We fly to Paris next week.  We are flying to Paris next week.   These sentences both seem correct to me.  Can anyone explain me how to correctly use these tenses? jQuery - Is it okay to use $('#ElementId') everytime? What is the easiest way to resolve apt-get BADSIG GPG errors? Can I use the valid Schengen visa in old passport? When I'm generating a List of Figures in my project, all figures are grouped by chapter. I would like to have the whole list without any additional new lines between different chapters.  How it looks like:  Figure 1.1  Figure 1.2  Figure 2.1  Figure 3.1  Figure 3.2   How it should:  Figure 1.1  Figure 1.2 Figure 2.1 Figure 3.1  Figure 3.2   I tried to apply the following solutions but failed completely :        My main file:  \documentclass[12pt,oneside,titlepage,utf8x]{report}  \usepackage{times,a4wide,multirow,tabularx,graphicx}  \usepackage{psfrag,fancyhdr,longtable}  \usepackage[T1]{fontenc} \usepackage{float} \usepackage[utf8]{inputenc}  \usepackage{url} \usepackage{color} \usepackage{verbatim} \usepackage{fancyvrb} \usepackage{natbib} \usepackage{relsize}  \usepackage{caption} \captionsetup[longtable]{belowskip=10pt}  \usepackage[left=4cm,top=2cm,right=3cm,bottom=2.5cm]{geometry}  \renewcommand{\chaptermark}[1]{\markboth{\nouppercase{\thechapter.\ #1}}{}} \pagestyle{fancy} \headheight 30pt \rhead{} \lfoot{} \cfoot{\thepage} \rfoot{}  \setlength{\parindent}{2em} \setlength{\parskip}{1em} \linespread{1.3}   \begin{document}  \begin{titlepage} \maketitle \end{titlepage}  \tableofcontents  \chapter{First} \label{sec:First} \input{chapter1/chapter1}  \chapter{Second} \label{sec:Second} \input{chapter2/chapter2}  \chapter{Third} \label{sec:Third} \input{chapter3/chapter3}  \relsize{-1} \listoffigures \normalsize  \bibliography{praca_mgr} \bibliographystyle{plain} \nocite{*}  \end{document} Why is SQL Server consuming more server memory? How might I schedule a C# Windows Service to perform a task daily? I have a service written in C# (.NET 1.1) and want it to perform some cleanup actions at midnight every night. I have to keep all code contained within the service, so what's the easiest way to accomplish this? Use of Thread.Sleep() and checking for the time rolling over?