capacity

What language(s) for very large lists?

Java (and maybe the underlying C-ish code) has max capacity of Integer.MAX_VALUE (~ 2 billion) for arrays and containers in java.util. Are there other languages that feature containers with larger capacities? ...

Should a .NET generic dictionary be initialised with a capacity equal to the number of items it will contain?

If I have, say, 100 items that'll be stored in a dictionary, should I initialise it thus? var myDictionary = new Dictionary<Key, Value>(100); My understanding is that the .NET dictionary internally resizes itself when it reaches a given loading, and that the loading threshold is defined as a ratio of the capacity. That would suggest ...

Best practice for rate limiting users of a REST API?

I am putting together a REST API and as I'm unsure how it will scale or what the demand for it will be, I'd like to be able to rate limit uses of it as well as to be able to temporarily refuse requests when the box is over capacity or if there is some kind of slashdotted scenario. I'd also like to be able to gracefully bring the service...

Estimating stream capacity

How many uncompressed PCM 64kbps streams can I fit in a wireless 802.11b connection 5.5 Mb/s when CWmin = 16? I assume that one packet contains 30 bytes + IP+UDP+RTP headers (20+8+12 bytes). ...

capacity scoping

how to perform a capacity scoping for sql server ? ...

Can SQL server 2008 handle 300 transactions a second?

In my current project, the DB is SQL 2005 and the load is around 35 transactions/second. The client is expecting more business and are planning for 300 transactions/second. Currently even with good infrastructure, DB is having performance issues. A typical transaction will have at least one update/insert and a couple of selects. Have yo...

Sharepoint performance under heavy load and capacity limitations

I'm working on a new storage system for a business solution package that consists of around 40 applications. Some of those applications generate documents (mostly docx, some pdf) that are currently saved and organized in a network share folder. Applications generate about 150.000-200.000 documents a year in average, and those documents ...

Finding curCapacity and maxCapacity Value, iPhone

Hello all, A method which can be used for finding the battery percentage of your device is found here: http://blog.coriolis.ch/2009/02/14/reading-the-battery-level-programmatically/comment-page-1/#comment-6085 I have tried it and it works great. If you have a closer look at the code there are two values curCapacity and maxCapacity. I ...

Return Capacity Values, Not Percent (iPhone)

Using this method here how would I return the curCapacity and maxCapacity mAh values rather than a percent? http://blog.coriolis.ch/2009/02/14/reading-the-battery-level-programmatically/comment-page-1/#comment-6089 No matter what I try my curCapacity and maxCapacity values match my battery percentage! Edit // My 1st attempt #include ...

How do I compute the capacity of a hard disk?

I have a worked example of how to compute the capacity of a hard disk, could anyone explain where the BOLD figures came out of? RPM: 7200 no of sectors: 400 no of platters: 6 no of heads: 12 cylinders: 17000 avg seek time: 10millisecs time to move between adj cylinders: 1millisec the first line of the answer given to me is: 12 x...

How much VRAM on each iPhone/iPod model?

I know MBX model has limit of 24MB VRAM. How about SGX models? And can I assume all iPhone/iPod touch models have SGX or MBX at least? No other models? And how much memory bandwidth (to/from GPU) they have? ...

Getting Numbers From A CFDictionary For Use In Calculations, iPhone

Hello all, I found this in my travels: http://www.opensource.apple.com/source/IOKitUser/IOKitUser-502/ps.subproj/IOPSKeys.h How would I get the values (as a number) of: #define kIOPSMaxCapacityKey "Max Capacity" and #define kIOPSDesignCapacityKey "DesignCapacity" I want to be able to use them throughout my app. What do I need to...

std::vector capacity after copying

Does vector::operator= change vector capacity? If so, how? Does vector's copy constructor copy capacity? I looked through documentation but could not find a specific answer. Is it implementation dependent? ...

How to shrink-to-fit an std::vector in a memory-efficient way?

I would like to 'shrink-to-fit' an std::vector, to reduce its capacity to its exact size, so that additional memory is freed. The standard trick seems to be the one described here: template< typename T, class Allocator > void shrink_capacity(std::vector<T,Allocator>& v) { std::vector<T,Allocator>(v.begin(),v.end()).swap(v); } The w...

Uses for the capacity value of a string

In the C++ Standard Library, std::string has a public member function capacity() which returns the size of the internal allocated storage, a value greater than or equal to the number of characters in the string (according to here). What can this value be used for? Does it have something to do with custom allocators? ...

Is it possible to give a python dict an initial capacity (and is it usefull)

I am filling a python dict with around 10,000,000 items. My understanding of dict (or hashtables) is that when too much elements get in them, the need to resize, an operation that cost quite some time. Is there a way to say to a python dict that you will be storing at least n items in it, so that it can allocate memory from the start? O...

Calculating usage of localStorage space

I am creating an app using the Bespin editor and HTML5's localStorage. It stores all files locally and helps with grammar, uses JSLint and some other parsers for CSS and HTML to aid the user. I want to calculate how much of the localStorage limit has been used and how much there actually is. Is this possible today? I was thinking for no...

How to use jquery to create progress bar for loading an image?

I want to take size in bytes of image in page at the first load page, and then create a loading bar and show it loading similar preloader of flash. But I don't know if jQuery can take size in bytes of image or not. ...

StringBuilder capacity()

I noticed that the capacity method returns StringBuilder capacity without a logic way ... sometime its value is equals to the string length other time it's greater... is there an equation for know which is its logic? ...

Finding Unmapped Network Share Capacity in Windows

Hi, I need to find the underlying disk capacity (total size) of an unmapped network share in windows (in Win7, Vista, XP, Server 2008), given a UNC path (e.g. given something like "\\share_1\subdir"). I've looked all over the web for several days and seem to find no answer to this issue. I would appreciate any leads. Thanks in advance ...