Through code Can I get the list of drives available on Azure VM(Medium size instance) along with their sizes..I am looking for a way where i can store the file temporarily on VM disk and delete it after reading from it.
THanks for you time
Regards,
Vivek
See Neil Mackenzie's post about local storage: https://convective.wordpress.com/2009/05/09/local-storage-on-windows-azure/.
It's as simple as doing RoleEnvironment.GetLocalResource("<name>").RootPath and then performing your file operations in that directory.
Do take a look at this Azure Storage article. They are essentially page blobs which can be mounted on your web/worker role's file system. One catch with Azure drives is that it only allows one instance to write to that while other instances have read only access to it.
HTH.
Related
is there anyone knows the lifetime of files on the colab virtual machine?
for example, in a colab notebook, I save the data to a csv file as:
data.to_csv('data.csv')
then how long will the data.csv exist?
This is the scenario:
I want to maintain and update over 3000 small datasets everyday, but it seems that the interaction between colab and google drive by using pydrive is pretty slow(as I need to check every dataset everyday), so if the lifetime of files on the virtual machine is long enough, I can update the files on virtual machine everyday(which would be much faster) then synchronize them to google drive several days a time rather than everyday.
VMs are discarded after a period of inactivity, so your best bet is to save files to Drive that you'd like to keep as generated.
With pydrive, this is possible, but a bit cumbersome. An easier method is to use a FUSE interface to Drive so that you can automatically sync files as they are saved normally.
For an example, see:
https://colab.research.google.com/drive/1srw_HFWQ2SMgmWIawucXfusGzrj1_U0q
I am trying to add offline usage to an app. I simply need all the work done by NSURLRequest / NSURLCache, while being able to choose exactly the disk storage location, so I can put it in "/Library/Application Support/whatever" where it won't ever be deleted (without forgetting the flag so it's not synced on iCloud / iTunes).
I feel like I have to do all the work myself and I run in a first issue. NSURLCache is keeping in memory a dictionary where the keys are the NSURLRequest and the values are the associated NSCachedURLResponse. I'm doing the same but then, I can't write this dictionary on the disk as it isn't made of basic types.
Do you have an idea on how to write on disk such a dictionary?
I am in a similar situation, I need a cache that can be used when the app is offline or untile the app parses new data.
AFAIK everyone would recommend you: https://github.com/steipete/SDURLCache.
But theoretically in iOS6 the NSURLConnection writes the cache to disk and you can use that cache as offline cache, but I still have to found out how.
So partial answer, will try to find out more and update the answer. :)
I am helping out an organization which are planning on changing their members system. Right now their system is developed in Plone and all their data is in a Data.fs file.
Their system is down for the moment and it would take some time and effort to get it up and running.
Is there a way to get the data out from the database into a standard format such as csv files or SQL? Or do they need to get the system up and running beforehand and export the files from "within" plone?
Thanks for your help and ideas!
Kind regards,
Samuel
The Data.fs file is a Object Oriented Database file, and it is written by a framework called the ZODB. The data within it represent python instances, layed out in a tree structure.
You could open this database from a python script, but in order for you to make sense of the contained structures, you'll need access to the original class definitions that make up the stored instances. Without those class definitions all you'll get is placeholder objects (Broken objects) that are of no use at all.
As such, it's probably easier to just get the Plone instance back up and running, as it'll be easier to export the exact data you want out if you have things like the catalog (basically a specialized database index) to build your export.
It could be that this site is down because of something trivial, something we can help you with here on Stack Overflow, or on the Plone users mailinglists or in the #plone IRC channel. If you do get it up and running and have some details on what you are trying to export, we certainly can help.
You'll need to get the system up and running to export data. Data in the data.fs file is stored as Python pickles and is not intelligible to "outside" systems.
As the others have pointed out before, your best course would be to have Plone running back again. After doing so, try csvreplicata to export existing data to csv format. And for user accounts, try atreal.usersinout.
If you need professional help, you can search for available providers from http://plone.org/support/providers
For free support, post specific problems here.
Recently I managed to export Plone 4 site to sqlite using SQLExporter: http://plone.org/products/proteon.sqlexporter. But you need to get your Plone instance working first to use it.
Currently in our research group, we have many "data files" stored on three servers and a couple of personal computers running different operating systems.
We want to build a database, which would store some information in addition to the URLs of those various "data files". My question is, do we have to copy all the data files and put them in a directory in the same server the database is in? Or can they be left as they are on the different computers? If the second case is ok, what would be the format of the url of the "data files"?
It really depends on what your intended goal is and what your current setup is like
If the files are currently sitting somewhere on the network, and you need a path that the application can use to access them, you just need to store the network path (\\server\share\file for Windows environments) in the database, then read it and access that path to access the files. You'll need to make sure everyone has read access to them.
If the files are currently accessible through a website URL, internal or external, then again, you just need to store that URL (or some portion thereof) (http://mywebsite.com/myfile or http://servername/myfile) and access that.
If either of the above are not currently true, but you want them to be, then you'll need to set up a new share/webserver and put the files there. There's no requirement that this be the same server as the database, but it'd make for better backups if it was.
If you want the files themselves to be in the database, you should check out Bob Fanger's link.
Not sure what you're asking here but...
If you want your database engine to read files filled with data, it probably doesn't matter where they are stored - though this may depend on the database you are using. Are you using MySQL? MS-SQL Server? Oracle?
Many database vendors provide relatively easy-to-use admin tools that would let you choose a file to be loaded, and usually the file chooser dialoge lets you browse networks so you could load a file over the network. Details on how to do this vary so consult the manual for your database engine for loading data from a pre-existing file.
Be aware that if the database is on Computer A and the data is being loaded from Computer B over the network, it will probably be slower than if the data was on the same computer as the database.
It doesn't really matter if the files are stored outside the database anyway.
See Storing Images in DB - Yea or Nay? for more thoughts on that one.
If the files accessible by an url, you can store that with the meta data, like
http://server1/folder/file.ext, file://\server1\folder\file.ext or "file://P:\folder\file.ext"
Things to consider:
Backups
Performance
Synchronisation between the meta-data and the data
I want to create a a application in actionscipt 3.0 that allows the user to listen to music and read descriptions of the music. For this to happen i suppose there should be a database where the textbits and music is located and then flash fetch the info when the correct buttons are pushed. The database will contain up to 100 tracks and textbits.
The application will function on a stand that won't have a connection to the internet.
What is the easiest way to do this in actionscript 3.0?
If any of you are familiar with UML and thinks this might help in understanding the problem, then here is use-case and flow-chart:
alt text http://img135.imageshack.us/img135/1498/flowchart2.jpg
alt text http://img27.imageshack.us/img27/1000/usercase.jpg
Thanks in advance.
The easiest way to do what you're asking is probably to store the files in a directory on the machine the application is going to be running on, and then design an XML structure for storing your data. The XML is easily loaded in to Flash at runtime and is easily edittable.
Your other option would be running a database server on the machine, creating web services that run locally and push/pull the data from the database, and then call those services from your Flash application.
The first option is most definitely the easiest and should be able to provide exactly what you need. The second would be more geared towards a distributed Flash application where you needed a central data repository for the clients.
If you're building an AIR application, you can use the integrated SQLITE database. But, i agree with Justin, the easiest way is to use a XML file.
You can probably consider using "Local Shared Objects" which is a kind of cookie, with bigger capacity (100Kb by default, but you can change it). Compared to other solutions already proposed, it has then advantage of not requiring any web server.