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What is the size of the default block on hyperldger fabric?

由 与世无争的帅哥 提交于 2019-12-04 11:08:04
问题 I'm trying to create a estimation of the size of a chain if i create a new blockchain using hyperldger. In order to have an idea of disk space usage i would like to know that is the average size of a default block in the hyperldger fabric. Thank you before hand, Best Regards 回答1: Bellow you can find default configuration provided for ordering service. You can actually control block size with BatchTimeout and BatchSize parameters, also note that this is pretty use case dependent as it relies

Do standalone JavaScript blocks have any use?

由 寵の児 提交于 2019-12-04 09:56:29
The MDN article on JavaScript blocks gives this example: var x = 1; { var x = 2; } alert(x); // outputs 2 As you can see JavaScript doesn't have block scope. So are there any good use cases for standalone blocks in JavaScript? By "standalone" I mean not paired with a control flow statement ( if , for , while , etc.) or a function . Short answer: ...not really. The only use I know for them is labels: myBlock: { // stuff if (something) break myBlock // jump to end of block // more stuff if (somethingElse) continue myBlock // jump to beginning of block // blah blah blah, more stuff } (almost like

What do “chunk”, “block”, “offset”, “buffer”, and “sector” mean?

由 被刻印的时光 ゝ 提交于 2019-12-04 09:44:25
问题 I have seen some of the scripts which are either dealing with archive or binary data or copy files (not using python default functions) use chunk or block or offset or buffer or sector . I have created a Python application and few of the requirements have been met by external libraries (archival / extracting data) or binaries. I would like to dive deeper now to get those third party library features into my application by writing a module of my own. Now I would like to know what those terms

generateCGImagesAsynchronouslyForTimes in ARC

由 爱⌒轻易说出口 提交于 2019-12-04 09:27:46
If I run the following in a project where ARC is enabled the completion handler never fires. But without ARC it works as expected. What am I missing here? NSURL *url = [NSURL URLWithString:@"http://media.w3.org/2010/05/sintel/trailer.mp4"]; AVURLAsset *asset=[[AVURLAsset alloc] initWithURL:url options:nil]; AVAssetImageGenerator *generator = [[AVAssetImageGenerator alloc] initWithAsset:asset]; generator.appliesPreferredTrackTransform = YES; CMTime thumbTime = CMTimeMakeWithSeconds(5,30); AVAssetImageGeneratorCompletionHandler handler = ^(CMTime requestedTime, CGImageRef im, CMTime actualTime,

posix threads block signal and unblock

由 落花浮王杯 提交于 2019-12-04 06:52:37
Is there a way to block certain signals and unblock other signals in the same set? I just dont seem to get my head around it! An example sigset_t set; sigemptyset(&set); sigaddset(&set, SIGUSR1); // Block signal SIGUSR1 in this thread pthread_sigmask(SIG_BLOCK, &set, NULL); sigaddset(&set, SIGALRM); // Listen to signal SIGUSR2 pthread_sigmask(SIG_UNBLOCK, &set, NULL); pthread_t printer_thread1, printer_thread2; pthread_create(&printer_thread1, NULL, print, (void *)&f1); pthread_create(&printer_thread2, NULL, print, (void *)&f2); bool tl = true; while(1) { if(tl) { // thread1 does something

li not displaying inline [closed]

由 浪尽此生 提交于 2019-12-04 06:50:25
问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . I am displaying a list of movies from a database- they are supposed to be displaying inline, but they are displaying vertically instead. I have tried

How To Call a func within a Closure

由 六月ゝ 毕业季﹏ 提交于 2019-12-04 06:40:54
问题 In a model's class Location , I get the name of the current city: var currentLatitude: Double! var currentLongitude: Double! var currentLocation: String! var currentCity: String! func getLocationName() { let geoCoder = CLGeocoder() let location = CLLocation(latitude: currentLatitude, longitude: currentLongitude) geoCoder.reverseGeocodeLocation(location, completionHandler: { placemarks, error in guard let addressDict = placemarks?[0].addressDictionary else { return } if let city = addressDict[

How to get LBA(logical block addressing) of a file from MFT on NTFS file system?

由 一曲冷凌霜 提交于 2019-12-04 06:34:07
问题 I accessed the $MFT file and extracted file attributes. Given the file attributes from MFT, how to get a LBA of file from the MFT record on NTFS file system? To calculate LBA, I know that cluster number of file. It that possible using cluster number to calculate? 回答1: I'm not entirely sure of your question-- But if you're simply trying to find the logical location on disk of a file, there are various IOCTLs that will achieve this. For instance, MFT File records: FSCTL_GET_NTFS_FILE_RECORD

How to pass a block to another in Ruby?

由 大兔子大兔子 提交于 2019-12-04 06:09:56
Assuming I have the following proc: a = Proc.new do puts "start" yield puts "end" end Also assuming I pass a to another method which subsequently calls instance_eval on another class with that block, how can I now pass a block onto the end of that method which gets yielded in a . For example: def do_something(a,&b) AnotherClass.instance_eval(&a) # how can I pass b to a here? end a = Proc.new do puts "start" yield puts "end" end do_something(a) do puts "this block is b!" end Output should of course should be: start this block is b! end How can I pass the secondary block to a in the instance

Visual block edit in vim

由 喜欢而已 提交于 2019-12-04 05:37:02
I have refer to this post to use block editing in vim. But when I key I or c after the block select, vim enters the normal edit mode just as if I pressed a i . I also found, when block is selected, I can use the x key to delete chars in the block. Before press I : After press I : How can I block input chars? the +visualextra have enabled from below version info. > $ vim --version VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Jan 2 > 2014 19:39:47) Included patches: 1-52 Modified by > pkg-vim-maintainers@lists.alioth.debian.org Compiled by buildd@ Huge > version with GTK2-GNOME GUI. Features
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