storage

问题 I am doing a large migration from physical machines to ec2 instances. As of right now I have 3 x.large nodes each with 4 instance store drives (raid-0 1.6TB). After I set this this up I remembered that "The data on an instance store volume persists only during the life of the associated Amazon EC2 instance; if you stop or terminate an instance, any data on instance store volumes is lost." What do people usually do in this situation? I am worried that if one of the boxes crash then all of the

问题 Could someone explain what difference between Object Storage and File Storage is please? I read about Object Storage on wiki, also I read http://www.dell.com/downloads/global/products/pvaul/en/object-storage-overview.pdf, also I read amazons docs(S3), openstack swift and etc. But could someone give me an example to understand better? All the difference is only that for 'object storage' objects we add more metadata? For example how to store image like object using some programming language

问题 The situation is that I have a user space file system which can provide a bunch of posix like interface in user space. Like this: open read write mkdir ... I want to make a volume on this file system and pass it to a docker. My question is how can I control the way docker access this volume so that it can be redirected to my posix like interface? Right now my file system can't be mounted on the host. It is a completely user space file system. I think fuse can support this, but I don't want to

问题 Good morning or good evening (it depends whenever you read this topic). I wrote this code using angular and laravel to upload multiple files, but what i get from the request is only one file object, and all others are discharged, for this reason in laravel controller doesn't loop in foreach and return undefined. Please leave me a feedback HTML <input ng-file-model = "files" value="Seleziona file" type="file" name = "file[]" class="btn btn-info btn-s" multiple /> Controller (AngularJS) $scope

问题 I'm looking at a simple table in MySQL that has 4 columns with the following sizes, unsigned bigint (8 bytes) unsigned bigint (8 bytes) unsigned smallint (2 bytes) unsigned tinyint (1 byte) So I would expect 19 bytes/row. There are 1,654,150 rows in this table so the size of the data should be 31,428,850 bytes (or about 30 megabytes). But I can see via phpMyAdmin that the data is taking up 136.3 MiB (not including the size of the Index on bigint 1, smallint, tinyint which is 79 MiB). Storage

问题 In my app I need to save a double value (high score) and String (player name) what should i use to get this. any idea will be great. Thank you 回答1: As deanWombourne said, you can use NSUserDefaults to store these data but it isn't very secure. If you don't want to store this data "in the air", you can take a look to SFHFKeychainUtils by Buzz Andersen to store them in the iPhone Keychain. First of all, copy SFHFKeychainUtils files to your project. Click on the SFHFKeychainUtils.m and click on

问题 Question Consider the following code: program example implicit none integer, parameter :: n_coeffs = 1000 integer, parameter :: n_indices = 5 integer :: i real(8), dimension(n_coeffs) :: coeff integer, dimension(n_coeffs,n_indices) :: index do i = 1, n_coeffs coeff(i) = real(i*3,8) index(i,:) = [2,4,8,16,32]*i end do end For any 5 dimensional index I need to obtain the associated coefficient, without knowing or calculating i . For instance, given [2,4,8,16,32] I need to obtain 3.0 without

问题 getExternalStorageDirectory() return SD card path on my phone. ( Huawei Y320 - android 4.2.2 ). now, how to get path Phone Storage path for all devices and all API? loot at bottom screenshot. 回答1: I'm using this method: public static final String SD_CARD = "sdCard"; public static final String EXTERNAL_SD_CARD = "externalSdCard"; private static final String ENV_SECONDARY_STORAGE = "SECONDARY_STORAGE"; public static Map<String, File> getAllStorageLocations() { Map<String, File> storageLocations

问题 I'm developing a File Manager app. I want show to the user the internal storage and the sdcard storage if it exists. For internal storage I use Environment.getExternalStorageDirectory().getPath() . How can I get the SD storage? 回答1: not sure this solution fits a File Manager but after many years trying to get the right code, this is my most recent one: /** * Returns all available SD-Cards in the system (include emulated) * * Warning: Hack! Based on Android source code of version 4.3 (API 18)

问题 I have a UIViewController for user to input their data and submit to our ASP.NET Webapi. there are about 40 textField and other controls. Is there any way i can save the input locally. the data will not be clear until user click the submit button. I want the data still there even restart the phone or restart the program. save in XML ? 回答1: There are quite a few options that you could choose from, ranging in complexity as follows: Use an NSKeyedArchiver to save to the local filesystem. This