caching

问题 PHP Colleagues: This question relates to best practices for using Laravel Cache. The central objective is to reduce the number of accesses to the database for all the usual performance-related reasons. The application is a read-intensive news site with perhaps a dozen controllers at most, mostly resource-type. Are there any documented best practices for the application design? It seems obvious to me that since Cache:: is a one-line statement, it's easy to drop this into the controllers --

问题 I have asked a similar question: Can a lower level cache have higher associativity and still hold inclusion? Suppose we have 2-level of cache. (L1 being nearest to CPU (inner / lower-level) and L2 being outside that, nearest to main memory) can L1 cache be write back? My attempt) I think we must have only write through cache and we cannot have write back cache in L1. If a block is replaced in the L1 cache then it has to be written back to L2 and also to main memory in order to hold inclusion.

问题 We are doing background data processing with Django Celery, taking a CSV file (up to 15MB), converting it into list of dict data (which also includes some Django model objects), and breaking it up into chunks to process in sub tasks: @task def main_task(data): i = 0 for chunk in chunk_up(data): chunk_id = "chunk_id_{}".format(i) cache.set(chunk_id, chunk, timeout=FIVE_HOURS) sub_task.delay(chunk_id) i += 1 @task def sub_task(chunk_id): data_chunk = cache.get(chunk_id) ... # do processing All

问题 I’m getting the following error in VSCode in my Angular 6 application: ERROR in src/app/providers/dynamic-data/dynamic-data.service.ts(5,26): error TS1149: File name '/Users/gibranshah/repos/eva/EVA/src/app/model/endpoint.ts' differs from already included file name '/Users/gibranshah/repos/eva/EVA/src/app/model/Endpoint.ts' only in casing. It’s telling me that this line in dynamic-data.service.ts: import { Endpoint } from '../../model/endpoint'; …refers to a file whose name is Endpoint.ts.

问题 Consider the following function, which returns all the unique permutations of a set of elements: def get_permutations(elements): if len(elements) == 0: yield () else: unique_elements = set(elements) for first_element in unique_elements: remaining_elements = list(elements) remaining_elements.remove(first_element) for subpermutation in get_permutations(tuple(remaining_elements)): yield (first_element,) + subpermutation for permutation in get_permutations((1, 1, 2)): print(permutation) This

问题 Consider the following function, which returns all the unique permutations of a set of elements: def get_permutations(elements): if len(elements) == 0: yield () else: unique_elements = set(elements) for first_element in unique_elements: remaining_elements = list(elements) remaining_elements.remove(first_element) for subpermutation in get_permutations(tuple(remaining_elements)): yield (first_element,) + subpermutation for permutation in get_permutations((1, 1, 2)): print(permutation) This

问题 I have a clickonce application on Windows Server 2012 IIS 8.5. I recently updated it to a new version and it works fine, except for one url used by a second web page to link to it. It links directly to the .application file and when I use that link I get version 2.1.0.10 of that file instead of the one that is one the server version 3.1.0.1. It's only when using the that link, other url's server the correct file. I've even stopped the website on both servers (load balanced) and the link still

问题 I have a clickonce application on Windows Server 2012 IIS 8.5. I recently updated it to a new version and it works fine, except for one url used by a second web page to link to it. It links directly to the .application file and when I use that link I get version 2.1.0.10 of that file instead of the one that is one the server version 3.1.0.1. It's only when using the that link, other url's server the correct file. I've even stopped the website on both servers (load balanced) and the link still

问题 I have a clickonce application on Windows Server 2012 IIS 8.5. I recently updated it to a new version and it works fine, except for one url used by a second web page to link to it. It links directly to the .application file and when I use that link I get version 2.1.0.10 of that file instead of the one that is one the server version 3.1.0.1. It's only when using the that link, other url's server the correct file. I've even stopped the website on both servers (load balanced) and the link still

问题 I have some image resources that are immutable and can be cached forever. Chrome seems to respect my response headers, and does not re-validate the resources: Here's an example of one of these resources in Chrome. As you can see, I include cache-control: public, max-age , expires , etag and last-modified and the resource is served from "memory cache": Firefox, however, does not respect these headers and re-validates the resources on every load! My server is hit with a request for each profile