storage

Why not storage PHP SESSION on a NFS Volume? [closed]

99封情书 提交于 2019-11-28 14:27:30
I know the best way for storage PHP SESSION is "handle in memcached" in PHP cluster. But, I want to know whether anyone storage PHP SESSION files in NFS (Networked File System), GFS or HDFS ? I want to know whether it had some risk? or performance not well? I think it can be provide SSO. The short answer is that you shouldn't use something like NFS for session management because it doesn't handle locking correctly on the distributed session files that could be accessed by any of the client servers. Plus, a lot of solutions don't correctly handle asynchronous reads. Plus, if your networked file

Chrome extension store large amounts of data

北城余情 提交于 2019-11-28 14:04:03
I'm looking for an efficient way to store large amounts of data in my chrome extension. I've got a few txt files which are around 1-2mb. I'd like my chrome extension to 'cache' them locally so I don't need to fetch them every time. I've found syncFileSystem but this is only available for packed apps. There were warnings when trying to install this extension: 'syncFileSystem' is only allowed for packaged apps, but this is a extension. What is the best way to store this sort of data in a chrome extension? manifest.json { "manifest_version": 2, "name": "__MSG_name__", "version": "1.0", "default

I want to store a value even after my program ends

拥有回忆 提交于 2019-11-28 14:02:36
I want to store a letter into a variable so that whenever the program starts again it can use the variable in further program execution. What is the way to achieve this? No, you cannot achieve this using variables . variables only exist untill the program finishes execution. Once the program is finished, no variable is retained . You need to make use of file i/o . You can write the end (final) data of one execution to a file, the next time program runs, it can read the file contains and resume the exection. For your reference, In C you can check below library functions fopen() fclose() fread()

how to remove data from a object using chrome storage?

前提是你 提交于 2019-11-28 13:56:20
i have an object stored inside chrome storage that looks like this: { "planA": { 123: {key: 'some key'} 124: {key: 'some other key'} }, "planB": { 223: {key: 'some key'} 234: {key: 'some other key'} } } i want to do something like chrome.storage.sync.remove([{"planA": "123"}]); but that seems not to work Error in response to storage.get: Error: Invalid value for argument 1. Value does not match any valid type choices. from the documentation StorageArea.remove(string or array of string keys, function callback) ant ideas? You can't do that in a single API call. The API only gives access to top

Accessing storage of simulator/device while debugging

你。 提交于 2019-11-28 11:39:47
I created an UWP project, where I store a file in the cache directory: string writeFilePath = Path.Combine(ApplicationData.Current.LocalCacheFolder.Path, "test.jpg"); await Task.Run(() => File.WriteAllBytes(writeFilePath, image)); Now I want to view the saved image, but I have no access to it. How do I access it from the simulator or directly on the device (Windows 10 Mobile phone)? Perhaps one could copy the file from the device to the local PC? I tried the IsolatedStorageExplorer , but I only get the following devices: 0 Device 1 Emulator 8.1 WVGA 4 inch 512MB(DE) 2 Emulator 8.1 WVGA 4 inch

How to retrieve images from cache memory in picasso?

这一生的挚爱 提交于 2019-11-28 11:31:46
I am using picasso library for loading images .In default picasso, It uses internal cache memory for loading images.But as per my app configuration ,i have to use external cache memory(Cache on Disk). so i used this code for Cache on Disk File httpCacheDir = new File(getApplicationContext().getExternalCacheDir(),"http"); long httpCacheSize = 10 * 1024 * 1024; // 10 MiB HttpResponseCache.install(httpCacheDir, httpCacheSize);} Picasso is flexible. So now it caches images in external Sd card.. The caches is stored in sdcard/android/data/packagename/cache/http The caches are stored in ".1" ,".0".

Storing very large integers in MySQL

心不动则不痛 提交于 2019-11-28 09:51:45
I need to store a very large number (tens of millions) of 512-bit SHA-2 hashes in a MySQL table. To save space, I'd like to store them in binary form, rather than a string a hex digits. I'm using an ORM ( DBix::Class ) so the specific details of the storage will be abstracted from the code, which can inflate them to any object or structure that I choose. MySQL's BIGINT type is 64 bits. So I could theoretically split the hash up amongst eight BIGINT columns. That seems pretty ridiculous though. My other thought was just using a single BLOB column, but I have heard that they can be slow to

Best way to store data between program runs in java?

前提是你 提交于 2019-11-28 09:26:21
What is the best way to store data between program runs in Java? I already know that you can use a text file and store the information that way, but I was wondering if there is a better way to store the information that is generated by the program between runs of the program. Also, is there any way to do it so as to keep the information secure? Specifically, I want to keep the end user from being able to access it. I was wondering if there was any way other placing the information that is genereated by the program between runs of the program? Simply use an ObjectOutputStream to serialize it

Android device specific camera path issue

百般思念 提交于 2019-11-28 09:11:05
I know that my question is a duplicate of this question and this one . But still I have some problems, so don't try to close or downvote my question friends. Please go through the question fully. In my app I want to store Images into the same folder as where the device native Camera stores them. As per my research, I have found out that each device stores the Images into a different name and in different folder. That is: Nexus-One stores its camera files into a folder named Camera (/sdcard/DCIM/Camera). All HTC devices store their camera files into a folder named 100MEDIA (/sdcard/DCIM

Save webview content to android storage and load it

孤人 提交于 2019-11-28 08:51:01
I want to make an android application which has a webview layout. This is the criteria of my application: The first time the application starts, webview loads an url (maybe facebook, google, etc..) webview.loadUrl("http://www.google.com"); After it loads the url, the application saves the loaded url to HTML View (file.htm) in a "specific place" in android's internal storage. So, let's say i open "google.com", the application saves the google's web page to HTML file (let's say the filename, "google.htm"), and when i go to that "specific place" and click the "google.htm" file, it shows the