storage

Recording data in a long running python simulation

隐身守侯 提交于 2019-12-04 05:35:52
问题 I am running a simulation from which I need to record some small numpy arrays every cycle. My current solution is to load, write then save as follows: existing_data = np.load("existing_record.npy") updated = np.dstack((existing_data,new_array[...,None])) np.save("existing_record.npy",updated) This has created a big performance bottleneck and the simulation runs at half the speed with this method. I have considered appending the numpy arrays to a list and writing it at the end of the

GCE Use Cloud Storage Bucket as Mounted Drive

↘锁芯ラ 提交于 2019-12-04 05:16:24
Is there a way to mount a storage bucket to an instance so it can be used by the webserver as storage? If not, how can I add more storage to the instance without adding another persistent disk with an OS? Brian Dorsey You can certainly create a new (larger) Persistent Disk and attach it to your instance as a data disk. This is a very good option, since it keeps your website data separate from your operating system. See the Persistent Disk docs for details on all the options. In your case: Create a new Persistent Disk for the data. Pick a size large enough for your data and large enough to get

Flash memory as mass storage device using STM32 USB Device Library

梦想与她 提交于 2019-12-04 05:16:04
There is this flash memory IC on my board, which is connected to my STM32F04 ARM processor. USB port of the processor is available for the user. I want my flash memory to be detected as storage device when connected to PC via USB. As the first step I defined my USB class as MSC in my program which works fine. Since when I connect my board to PC, it detects a mass storage device connected, giving an error that "You should format the disc before using it". Now the question is that, how I can define my flash as 'the storage' to my processor. The following would probably be a part of your answer:

Google Cloud Storage Javascript Usage

女生的网名这么多〃 提交于 2019-12-04 04:53:34
i am trying to upload images into buckets on Google Cloud Storage using the JSON API , using the Javascript sample: Api Javascript Sample I am able to upload pictures but it asks me to log in on my google account. Tthe sample has an Authorization button, which I understand manages the OAuth credentials. function checkAuth() { gapi.auth.authorize({ client_id: clientId, scope: scopes, immediate: true }, handleAuthResult); } The problem is: I want to authenticate without having the pop up screen, that means without login in with Google. Because my client doesn't know the email or password, I want

Storage for millions of images [closed]

女生的网名这么多〃 提交于 2019-12-04 04:22:47
I need to prepare a storage for hundreds of millions of images (now I have 70 millions and this number is still growing). Each image has approx. 20kB. Of course I can store them in a filesystem, but I'm affraid of number of inodes. I have tested MongoDB and Cassandra. Both of them have disadvantages (I have limited HDD resources): MongoDB - disk space consumption is 3 times larger than size of raw data Cassandra - disk space consumption is similar to size of raw data but Cassandra needs a lot of free space for compaction procedure Anybody can suggest proper solution for this kind of problem ?

Read from internal storage in Windows Phone 8?

好久不见. 提交于 2019-12-04 04:10:14
问题 Is there a way to access the internal file storage in Windows Phone 8? I noticed that there is a way to read files from the SD card http://msdn.microsoft.com/en-us/library/windowsphone/develop/microsoft.phone.storage(v=vs.105).aspx but what about the phones that don't have an SD card slot, like the Nokia Lumia 920? 回答1: I am not sure where specifically you mean by internal storage, but there are a few locations you can access on the device. Application Data (Formerly Isolated Storage) This is

AzCopy login fails

纵然是瞬间 提交于 2019-12-04 04:04:25
After running azcopy login and signing in with my Azure account, I see the following response on the sign in page: “User account from identity provider does not exist in tenant ‘Microsoft’ and cannot access the application in that tenant. This account needs to be added as an external user in the tenant first. Sign out and sign back in again with a different Azure Active Directory user account.” Am I missing something like an App Registration? You are probably facing this issue because you are not specifying your Azure AD tenant-id while trying to login with azcopy.exe So instead of azcopy.exe

MySQL TEXT or VARCHAR

六月ゝ 毕业季﹏ 提交于 2019-12-04 03:48:55
We have a very large historical table that contains a column with at most 500 UTF8 characters, and the disk space grows really fast! We're having at least 2 million rows a day... and we were wondering which would do a better job (mostly in storage but in performance as well)? TEXT or VARCHAR(512)? VARCHAR is probably preferable in your case from both the storage and performance perspective. View this oft-reposted article . This is useful information; I think in general, the answer is the varchar is usually the better bet. From the MySQL manual: In most respects, you can regard a BLOB column as

Disadvantages of storing images in a Database? [closed]

Deadly 提交于 2019-12-04 03:31:36
问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . Can anyone please tell me the disadvantages of storing images in a MySQL database? Is it not as efficient as storing the images on the

Keep files after uninstallation of android app

半世苍凉 提交于 2019-12-04 03:28:21
问题 I want to use a file to store purchased data. Since the app is going to be free and a certain amount of credits are given at the installation. What happens now is that if I uninstall the installation, also the files on the SD card are deleted. So at reinstallation you have your free credits again. I use the following code: File file = new File(mContext.getExternalFilesDir(null), FILENAME); try { FileOutputStream os = new FileOutputStream(file); DataOutputStream out = new DataOutputStream(os);