recovery

问题 What causes a computer program to turn into a Big Ball of Mud? Is it possible to recover from this anti-pattern? Are there proven refactoring methods that can be applied? 回答1: A Big Ball Of Mud normally occurs because of one of the following: Change of Requirement s - You architect a solution with one set of requirements, which over time change and now, you are probably catering to a different audience who wants to use the same product with slightly different requirements. You bake those

问题 When I save a .m file in a folder, MATLAB autosaves a .asv file in the same folder. I opened this file and I found that it contains my code from the beginning, ignoring what I have deleted. What is the use of this file? What's the risk if I delete that file? 回答1: A .asv file is just what you said, an "AutoSave" file. It's just there so that you don't lose all your code if your computer crashes/shutdown. You can delete it whenever you want. If you find them annoying you can go to File

问题 I am so confused and I think I've lost hours of work. I was editing a file in Git earlier, and I saved it, but did not commit. I did do a few other file changes, and commited and pushed them. However, one file was messed up, so I clicked on the last successful commit, and pressed "roll back to this commit." To my horror, it erased all my uncommitted changes, and now I have no idea how to get them back since they were not committed. 回答1: You say that you didn't commit it. Unfortunately git

问题 I altered a stored procedure and unknowingly overwrote some changes that were made to it by another developer. Is there a way to undo the changes and get the old script back? Unfortunately I do not have a backup of that database, so that option is ruled out. 回答1: The answer is YES , you can get it back, but it's not easy. All databases log every change made to it. You need to: Shutdown the server (or at least put it into read-only mode) Take a full back up of the server Get a copy of all the

问题 I am looking at the recovery actions settings and there are a couple of things that I need clarified. If I have 0 days as my reset fail count after, and have the following as my actions: Restart the Service - on first failure Restart the Service - on second failure Reboot the Computer - on subsequent failures Does the fail count get reset on a successful restart of the service? Does the fail count get reset on the first failure? Hence never having a chance to perform the second or third

问题 Let's say, I delete a PostgreSQL docker container which had its data only here: $ docker inspect postgres1 ... "Source": "/var/lib/docker/volumes/4948af..../_data" "Destination": "/var/lib/postgresql/data" $ docker rm postgres1 If there was no other container referencing the volume, I cannot reconnect to this volume with --volumes-from any more, even though the files are still on disk somewhere in: /var/lib/docker/volumes/... This presents me with two problems: What is the best way to locate

问题 Is it possible to recover a deleted XML file from app in Android IDE? Unfortunately I deleted important files from my app. 回答1: For Eclipse: To restore a deleted Workbench resource with a state from the local history: In one of the navigation views, select the folder or project into which you want to restore a local history state From the resource's pop-up menu, select Restore from Local History.... The Restore From Local History dialog opens showing all files that were previously contained

问题 This is a follow up question to a previously answered post: Is there a command line utility for validating SQLite databases in Linux? If a database is producing the following error: $ sqlite3 mydata.db "PRAGMA integrity_check" Error: database disk image is malformed Is there any cleanup processing that can be done to recover the database to a usable state? Even at the potential loss of some corrupt records? Thanks 回答1: If there were any automatic method, SQLite would already be able to do it.

问题 As the data in case of Cassandra is physically removed during compaction, is it possible to access the recently deleted data in any way? I'm looking for something similar to Oracle Flashback feature ( AS OF TIMESTAMP ). Also, I can see the pieces of deleted data in the relevant commit log file, however it's obviously unreadable. Is it possible to convert this file to a more readable format? 回答1: You will want to execute a restore from your commitlog. The safest is to copy the commitlog to a

问题 We're using SQL Server 2000 Query Analyser, and one issue we have is that very occasionally, when a user is updating our live database, they insert the incorrect/no(!) where clause. I know, not good, but it happens. Are there any editors that will warn of the number of rows that might be changed (if that is even possible) or even a way to configure an editor, if it is connected to a certain database, to prompt for confirmation before the query is run? We have a way to recover our data in the