storage

Are FileChannel.force and FileDescriptor.sync both needed?

∥☆過路亽.° 提交于 2019-12-04 03:01:48
问题 In https://stackoverflow.com/questions/730521/really-force-file-sync-flush-in-java, the author writes in the summary of the answers: Use c.force(true) followed by s.getFD().sync() for Java NIO My question is: do you really need both? Isn't force enough? Aren't force and sync just different interfaces for doing the same thing? I can't find anyplace where this is confirmed. 回答1: My understanding is that the correct answer is No. FileChannel.force calls fdatasync or fsync. This can be seen in

Django upload file into specific directory that depends on the POST URI

无人久伴 提交于 2019-12-04 02:44:20
I'd like to store uploaded files into a specific directory that depends on the URI of the POST request. Perhaps, I'd also like to rename the file to something fixed (the name of the file input for example) so I have an easy way to grep the file system, etc. and also to avoid possible security problems. What's the preferred way to do this in Django? Edit: I should clarify that I'd be interested in possibly doing this as a file upload handler to avoid writing a large file twice to the file system. Edit2: I suppose one can just 'mv' the tmp file to a new location. That's a cheap operation if on

Web SQL Storage Limitations in Chrome and Android?

别来无恙 提交于 2019-12-04 02:16:30
So I am writing a web app that needs to store ~40MB of offline data in a offline Web SQL database. It needs to work in Chrome (desktop), Safari (desktop and mobile) and android's browser. Now I know that Web SQL is supported in these browsers and I know since which versions but i need to know how much storage is allowed. Safari desktop supports 500MB of database storage. Safari mobile supports 50MB of database storage. However I have spent literally hours searching everywhere to find out what space chrome desktop supports and what the android browser supports but cannot find anything concrete.

What is the best way to store user uploaded files in a website?

北城余情 提交于 2019-12-04 02:02:39
I'm trying to create a website in which I need to store a few user uploaded files (like some profile images, some xml files etc). So what is the best way to store those files? Currently, I'm creating a new directory on the server for every new user registered and storing the files for each user in their respective directory but someone told me it's not the best way. So, how do I store those files? Whether I create a common directory & name the files as per the user-id or something related to the user OR keep creating a new directory for every user?? miku A workable solution will depend on your

Exception of type 'Microsoft.WindowsAzure.StorageClient.StorageClientException' was thrown

梦想的初衷 提交于 2019-12-04 01:46:41
问题 Exception of type 'Microsoft.WindowsAzure.StorageClient.StorageClientException' was thrown. Sometimes even if we have the fabric running and the role manager is up, we get an exception of this sort. The code breaks at the line: emailAddressClient.CreateTableIfNotExist("EmailAddress"); public EmailAddressDataContext(CloudStorageAccount account) : base(account.TableEndpoint.AbsoluteUri, account.Credentials) { this.storageAccount = account; CloudTableClient emailAddressClient = new

Saving public files in the internal storage

荒凉一梦 提交于 2019-12-03 23:35:15
I have an application that saves files downloaded from a server. These files are not private to my application and should be accessible to other applications as well. I want to know what would be the correct path to save these files when the SD card is ABSENT. For the SD card, there is the well known API - getExternalStorageDirectory() For the application's private data in the internal memory there is - Context.getFilesDir() On some devices, the internal memory is represented by /emmc/. It will be really helpful if someone could elaborate on /emmc/. I know it stands for embedded Memory card

How read and display available space in android both sd card and internal memory?

馋奶兔 提交于 2019-12-03 22:18:12
问题 how to programmatically read and display the size of sd-card and internal memory. Internal Memory total space. used space. free space. External Memory total space. used space. free space. any related suggestions are apreciatted 回答1: Try this code: public static long remainingLocalStorage() { StatFs stat = new StatFs(Environment.getDataDirectory().getPath()); stat.restat(Environment.getDataDirectory().getPath()); long bytesAvailable = (long)stat.getBlockSize() *(long)stat.getAvailableBlocks();

Spark: Not enough space to cache red in container while still a lot of total storage memory

本小妞迷上赌 提交于 2019-12-03 21:58:27
I have a 30 node cluster, each node has 32 core, 240 G memory (AWS cr1.8xlarge instance). I have the following configurations: --driver-memory 200g --driver-cores 30 --executor-memory 70g --executor-cores 8 --num-executors 90 I can see from the job tracker that I still have a lot of total storage memory left, but in one of the containers, I got the following message saying Storage limit = 28.3 GB. I am wondering where does this 28.3 GB came from? My memoryFraction for storage is 0.45 And how do I solve this Not enough space to cache rdd issue? Should I do more partition or change default

Chrome extension and local storage

倾然丶 夕夏残阳落幕 提交于 2019-12-03 21:33:19
I'm trying to make a Chrome extension. For that extension, I need some info that is dynamically created, but I want that data to be added even later on (on a different page). This is some sort of data that i want to be always accessible (when the plugin runs): var villages = new Array(); villages[0][0] = "village1"; villages[0][1] = "1325848"; villages[1][0] = "village2"; villages[1][1] = "8744351"; villages[2][0] = "village3"; villages[2][1] = "8952187"; As you can see, the array is multi-dimensional. This because I want to store the names [0] and the village id 1 together. Does anybody knows

Nodejs in-memory storage

点点圈 提交于 2019-12-03 20:37:16
问题 How do I store data to be used for all the clients in my server? (like the messages of a chat) 回答1: The server that node.js allows you to build, is an application server, which means that state is preserved, between request, on the server side. The following snippet demonstrates this: var sys = require('sys'), http = require('http'); var number = 0; http.createServer(function (req, res) { console.log(req.method, req.url); res.writeHead(200, {'Content-Type': 'text/html'}); res.write('<h1