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The sync pack in Golang has a very useful function, which is Waitgroup
Let's talk about the purpose of Waitgroup: it can wait until all the goroutine execute, and block the execution of the main thread until all the Goroutine execution is complete.
Waitgroup a total of three methods: ADD (delta int), done (), Wait (). Simply say the effect of these three methods.
Add: Ad
First of all, we need to set the current sync mode memory size 512-2048 range before ethereum default fast sync modeMaximizing memory in the case of server configurationEnter the following commandGeth--fast--cache=2048The fastest synchronization mode is also the fastest way to synchronize chunksIf you're afraid the wallet is stuck or it's not responding, then lay out multiple nodes within the same chunk are
running. It seems to explain very funny, but I think multithreading is not so complicated, do not think that security issues on the head, multithreading is not necessarily thread insecure. As mentioned above, there is a thread-safety problem with multiple threads sharing the same variable, and on the contrary, there is no problem in the case of shared variables. I once tested multithreading no problem, later found that I did not share variables in the test, the body of each thread is a new obje
This is a creation in
Article, where the information may have evolved or changed.
See the following 2 examples:
Non-buffer:Http://play.golang.org/p/RwPbCcueWh
func main() { ch := make(chan bool) go func() { println("fuck buffer channel")
With buffer:Http://play.golang.org/p/YV9H6WPYuJ
func main() { ch := make(chan bool, 1) go func() { println("fuck buffer channel")
The second program (Chan with buffer) cannot guarantee the receive/send synchronizati
Very early on this idea: I sometimes use a number of blogs, some blog on a website after writing, to sync to other blog sites, their own can only copy and paste, feel particularly boring, copy and paste numb. have been thinking of what technology can achieve a blog, multi-station synchronization. Recently searched online, there is really this information, that is, with MetaWeblog API interface, this is like Foxmail can put multiple mailboxes together
When you develop an export project on Android, you find that you sometimes get an error, as follows: Problems were encountered during export:Error exporting Palmidentify/bin/jarlist.cache:resource is out of sync with the file system: '/palmidentify/bin/jarlist.c Ache '.Resource is out of sync with the file system: '/palmidentify/bin/jarlist.cache '. Some people say that files are out of
Sync-settings IntroductionSync-settings is a backup plugin that backs up Atom's global settings, plug-ins, key bindings (keymaps), interface styles, code Snippets (snippets), and init script.Sync-settings ConfigurationConfiguration Items Access Token and Gist Id need to go to GitHub to request a buildRequest to generate token and gist IDGist is a feature of GitHub that allows you to record code snippets and save the code you use frequently in your wor
We currently use the Tools Azure AD Connect directory Sync tool to synchronize user information for the local domain controller to office365 and AzureUse Windows Task Scheduler or a separate Windows service to trigger the synchronization process in the previous directory Synchronization toolBut the new Sync tool, Azure AD Connect, is a built-in scheduler that was launched with Build 1.1.105.0 (released in F
remember that the custom ' uc_key ' must be the same as the config.php inside.
Next is the api/uc.php in your home directory.
For example, the application URL is filled in as http://www.bKjia.c0m so I have a corresponding http://www.bKjia.c0m/api/uc.php.
If you want to customize, please confirm your correspondence.
The most important thing is api/uc.php, synchronous login is to access the application of uc.php about this DZ has given the demo
[PHP code]:
The code is as follows
Co
Google has released chrome 4. in Version X, chrome 4 not only improves the engine and rendering speed, but also adds a lot of the latest HTML 5 technology from this stage, the latest version of chrome 4. in the X developer version, the bookmarks synchronization function is added.
Chrome developer Tim Steele introduced on his blog yesterday that Chrome has the bookmarks synchronization function since the latest developer version. Since many users often access the Internet on different machines
Veeam Backup Replication synchronization is different from the mechanism of backup, synchronization is to crawl the virtual machine directly to the other end, the equivalent of a full standby, and then according to the scheduled task to take a snapshot, and based on the configuration to retain the most recent snapshots for failover recovery, This example synchronizes from a 61ESXi host to a 70ESXi host.1. Add a sync taskTwo ESXi hosts, synchronizing
This article to the Code farm Introduction Typecho blog published article sync Sina Weibo plugin, this can increase your blog's social traffic, while increasing the user's stickiness. Interested in the code farmers can refer to.
Typecho blog post article sync Sina Weibo plugin, can increase your blog's social traffic, while increasing the user's stickiness, click to download:
Typechosina.zip
The install
Android and Ubuntu sync using Xmind
The story originated from I have been accustomed to use the brain map to organize ideas, usually using Xmind with Jinshan fast disk in the office and the home of the machine between the automatic synchronization, very convenient.
Recently, often to leave the office, occasionally with Android to remember little things, Mindjet maps is a great tool, but his only problem is that the server in foreign countries, each b
offEcho.Echo starts syncing data, wait a minute ...Echo.CD C:\Program Files (x86) \icw\binRsync.exe-avz--progress--port=8899/cygdrive/d/backup/database/[email protected]::backup/backup/Echo.echo Data Sync completeEcho.The above Passwd.txt file saves the rsync sync user root password, saved in C:\Program files (x86) \icw\bin, using the "4. Set scheduled Task timing synchronizationAdd a batch script to a Win
], @ "JSON", @ "Query"];Nsurl *url = [Nsurl urlwithstring:[strurl urlencodedstring];ASIHTTPRequest *request = [ASIHTTPRequest Requestwithurl:url];[Request startsynchronous]; Sync RequestNSLog (@ "request complete ...");Nserror *error = [request ERROR];If the Error object is not empty, there is an error in the request processif (!error) {NSString *response = [request responsestring];NSData *data = [request ResponseData];The return value is NSData, and
There are the following points:
1. The Sync method stores the model persistently on the server side. You can rewrite the implementation method of this method, which uses jquery's $. Ajax by default.
2. For the entire backbone, only the sync of the model and collection will call backbone. Sync.
3. The request type is determined by the first parameter method, wh
Error in running The download code on GitHub: 'The sandbox is not sync with the Podfile. lock \ ', githubpodfile. lockProblem description:
The Demo downloaded from github often uses CocoaPods. Sometimes it cannot be compiled and run due to dependency or version issues. For exampleThe sandbox is not sync with the Podfile. lockThe problem is as follows:
Diff :/.. /Podfile. lock: No such file or directory di
Package Main;import ("FMT" "Sync" "Runtime" "Time")//locking, note that the lock is to be passed in as a pointer, otherwise it is just a copy of the Func total1 (Num *int, mu *sync. Mutex, CH chan bool) {mu. Lock (); for i: = 0; i Go Language Sync Pack learning (Mutex, Waitgroup, Cond)
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