问题描述
将图像写入DSC（如一堆jpeg图像）是否需要自定义序列化机制？我见过使用FromEnumerable的DupPic2示例，后者又使用ObjectRecord包装器将文件传输到DSC。
Does writing images to DSC (like a bunch of jpeg images) require a custom serialization mechanism? I have seen the DupPic2 example which uses FromEnumerable which in turn uses the ObjectRecord wrapper for transferring files to DSC.
如果我不使用HPCLinqExtras.dll并尝试将图像传输到DSC使用基本API，挑战是什么？
If I were to not use the HPCLinqExtras.dll and try to transfer images to DSC using the basic API, what is the challenge?
从学习的角度来看，这更多的是：数据转移到DSC时究竟发生了什么？为什么DSC需要单独的序列化机制，为什么有些情况需要自定义序列化？
This is more from a learning point of view: What exactly happens while data is trasferred to DSC? Why does DSC require a separate serialization mechanism, and why do some cases require custom serialization?
文档还解释了一些我无法清楚掌握的引导问题。
The documentation also explains about a certain bootstrapping problem, which I couldn't grasp clearly.
我只想更好地理解这一点。如果您能指出一些我可以阅读并获得理解的文档/资源，我将不胜感激。
I just want to understand this better. I would appreciate if you can point me to some documentation/resource that I can read and get an understanding.
推荐答案
要清楚，当数据传输到DSC时没有任何反应。文件将直接复制到群集而不进行任何更改。您可以创建一个包含（比方说）jpeg图像的文件集，并直接从DSC共享加载这些图像，它们与
保持不变，（明显的）例外有不同的文件扩展名。
To be clear nothing happens to data when it's transferred to DSC. The files are copied directly to the cluster with no changes. You can create a fileset containing (say) jpeg images and load those images directly off the DSC shares, they are unchanged with the (obvious) exception of have a different file extension.
这里的样本有点不清楚。我已经为下一个版本更新了它。这是代码。您将看到您不必使用FileRecord：
The sample is somewhat unclear here. I've updated it for our next release. Here's the code. You'll see you don't have to use FileRecord:
public
static
void
ReadLibrarySerializedDataFiles（ HpcLinqContext
context）
publicstaticvoid ReadLibrarySerializedDataFiles(HpcLinqContext context)
{
CustomTypeFileGenerator 。CreateFiles（ SampleConfiguration 。ImageFilesPath ）;
CustomTypeFileGenerator.CreateFiles(SampleConfiguration.ImageFilesPath);
RemoveFileSets（context）;
RemoveFileSets(context);
context.DscService.CreateFileSet（DataPartitionedFileSetName）
context.DscService.CreateFileSet(DataPartitionedFileSetName)
.AddNewFiles（
.AddNewFiles(
目录 .GetFiles（ SampleConfiguration 。ImageFilesPath ，
" * .jpg" ））
Directory.GetFiles(SampleConfiguration.ImageFilesPath,"*.jpg"))
.Seal（）;
var
imageData = context.CreateFileSetNodeMap（DataPartitionedFileSetName）
var imageData = context.CreateFileSetNodeMap(DataPartitionedFileSetName)
。选择（r => GetImageData（r.Line））;
.Select(r => GetImageData(r.Line));
控制台 。WriteLine（ " \ n \\\
Partitioned
数据作为图像记录的DSC文件集（前10条记录）：" ）;
Console.WriteLine("\n\nPartitioned data as DSC file set of Image records (first 10 records):");
foreach
（ var
rec in
imageData.Take（10 ））
foreach (var rec in imageData.Take(10))
控制台 。WriteLine（ "
{0} \t {1} x {2}" ，rec.Item1，rec.Item2，rec.Item3）;
Console.WriteLine(" {0}\t{1}x{2}", rec.Item1, rec.Item2, rec.Item3);
}
public
静态
元组 < string ，
int ，
int >
GetImageData（ string
路径"
publicstaticTuple<string,int,int> GetImageData(string path)
{
使用
（ Image
img = 图像 。FromFile（path））
using (Image img = Image.FromFile(path))
{
返回
new
元组 < string ，
int ，
int >（路径，
img.Width，img.Height）;
returnnewTuple<string,int,int>(path, img.Width, img.Height);
}
}
这篇关于将BLOB（图像或二进制对象）写入DSC - DSC序列化的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！