synchronization

I want to continually sync every 30 mins or less around 380000 rows of data from 11 tables from a SQL Server database to a MySQL database. How can I do this? What programs can do this? This post , which is often used to close questions like these as a duplicate, does not work for me, for the following reasons. The SQL Server is part of a CRM system, I'm not sure if it may be a lite version or something, but long story short I do not have access to the SQL Server Management Studio. The MySQL database is part of my hosting package, which means I have access to it via phpmyadmin and the like, but

What's a good way of allowing searches from multiple threads on a list (or other data structure), but preventing searches on the list and edits to the list on different threads from interleaving? I tried using synchronized blocks in the searching and editing methods, but that can cause unnecessary blocking when trying to run searches in multiple threads. EDIT: The ReadWriteLock is exactly what I was looking for! Thanks. Usually, yes ReadWriteLock is good enough. But, if you're using Java 8 you can get a performance boost with the new StampedLock that lets you avoid the read lock. This applies

I am using pysftp library's get_r function ( https://pysftp.readthedocs.io/en/release_0.2.9/pysftp.html#pysftp.Connection.get_r ) to get a local copy of a directory structure from sftp server. Is that the correct approach for a situation when the contents of the remote directory have changed and I would like to get only the files that changed since the last time the script was run? The script should be able to sync the remote directory recursively and mirror the state of the remote directory - f.e. with a parameter controlling if the local outdated files (those that are no longer present on

What do you mean by Atomic instructions? How does the following become Atomic? TestAndSet int TestAndSet(int *x){ register int temp = *x; *x = 1; return temp; } From a software perspective, if one does not want to use non-blocking synchronization primitives, how can one ensure Atomicity of instruction? is it possible only at Hardware or some assembly level directive optimization can be used? Some machine instructions are intrinsically atomic - for example, reading and writing properly aligned values of the native processor word size is atomic on many architectures . This means that hardware

I'm running in a loop and kicking off tasks in the following manner: var iResult = new List<Task>(); foreach(var i in myCollection) { var task = Task.Factory.StartNew(() => DoSomething(), TaskCreationOptions.LongRunning); task.ContinueWith(m => myResponseHandler(m.Result)); iResult.Add(task); } Within my DoSomething() method, I have a timer: public static myMsg DoSomething() { var timer = System.Diagnostics.Stopwatch.StartNew(); DoLongRunningTask(); //If it matters this hits a REST endpoint (https) timer.Stop(); return new myMsg(timer.ElaspedMilliseconds); } When I iterate through my list of

While reading about synchronization, I came across "monitor pattern" to encapsulate mutable states. The following is the sample code public class MonitorLock { private final Object myLock = new Object(); Widget widget; void someMethod() { synchronized(myLock) { // Access or modify the state of widget } } } Is it better in any way to have a private lock instead of the intrinsic lock? Yes - it means you can see all the code which could possibly acquire that lock (leaving aside the possibility of reflection). If you lock on this (which is what I assume you're referring to by "the intrinsic lock")

I need to be able to check if the local OneDrive folder is in sync/up to date. Can I check this by looking at any of the file/folder properties(in C# code) Without using any of One Drive APIs? I was stuck with that and tought to check the main folder Icon. EDITED The point is to extract the synced folder icon and get the overlay CLSID. You first need a class to extract the info you need : using System; using System.Collections.Generic; using System.Drawing; using System.IO; using System.Runtime.InteropServices; using Microsoft.Win32; namespace MyApp.Classes { public class ExtractIconInfo {

Given an array of type foo_t[n] and a set of n threads, where each of the n threads reads and modifies a different element of the array, do I need to explicitly synchronize modifications of the array or can I assume that concurrently modifying members of the array is well-defined behavior? Does it matter how large foo_t is / what alignment it has? What I try to do is well-defined behavior. See ISO/IEC 9899:2011 §5.1.2.4.27: NOTE 13 Compiler transformations that introduce assignments to a potentially shared memory location that would not be modified by the abstract machine are generally