storage

问题 I have many many .RData files containing one dataframe that I had saved in a previous analysis and the data frame has the same name for each file loaded. So for example using load(file1.RData) I get a data frame called 'df', then using load(file2.RData) I get a data frame with the same name 'df'. I was wondering if it is at all possible to combine all these .RData files into one big .RData file since I need to load them all at once, with the name of each df equal to the file name so I can

问题 It'd be convenient if an application I'm writing stored some files to external storage permanently (so they persist after the application has been exited[destroyed]), but on an uninstall I'd like to do the decent thing and have these files removed to free up the storage. Is there any way I can have these files removed on an uninstall? If there isn't (and I'm skeptical), then I'll have to create these files each time. I'm trying to save start-up time and also occupy required space by having

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 6 years ago . I want to make Cookbook application for storing and reading (and updating) recipes, or anything else to practice OOP programming and thinking. But, I am not sure, what way of storing data, in this case, recipes, is the best in c# (Visual Studio Express). I want to optimize

问题 I'm going to store records in a single table with 2 fields: id -> 4 characters password_hash -> 64 characters How many records like the one above will I be able to store in a 5mb PostgreSQL on Heroku? P.S.: given a single table with x columns and a length of y - how can I calculate the space it will take in a database? 回答1: Disk space occupied Calculating the space on disk is not trivial. You have to take into account: The overhead per table (small, basically the entries in the system catalog

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . 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

问题 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.

问题 What storage system should I use , If i'm going to deploy a outlook plugin with VSTO ? Is it possible to use outlook's , which is for email ? UPDATE I thought about SQL Express , but I think I should use the same thing with what outlook uses , that would save troubles 回答1: There are numerous options for you to consider, below I've listed all the ones I've seen used in the past. For Outlook-managed storage you could look into using StorageItem which is a hidden item inside a given folder (

问题 I would like to know if there is a way to store a small amount of data permanently. By permanently I mean I want the data to persist even if user clears app data / uninstalls app. I know that shared preferences and databases are deleted when user clears app data / uninstalls app. I also know that I can save stuff on SD Card, but what if device does not have SD Card / SD Card is unmounted? I think that the best option would be to save the data on device internal memory, but is it possible to

问题 I'm trying to download content with an URL to a local file system in my iPad (cachedDir ? ) with this function: - (IBAction)download:(id)sender { NSURL *url = [NSURL URLWithString:@"http:www.google.de"]; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request setDelegate:self]; [request startAsynchronous]; [request setDownloadDestinationPath:@"/Users/ben/Desktop/my_file.pdf"]; // Which //directory?? } Which directory do I have to choose for my path if I want to store the data

问题 I am posting this in relation to another open question i have, however I thought that this deserved it's own question. Alternate question (for reference): Java Proxy Discovering Bot Basically, I need to store a very large amount of data and have it accessible very quickly. This would work ideally in an unlimited memory situation: boolean[][][][] sets = new boolean[256][256][256][256]; boolean get(byte[] a) { return sets[a[0]][a[1]][a[2]][a[3]]; } However, this uses around 16gb of ram which is