caching

问题 I'm writing a cache simulation program in C on linux using gcc as the compiler and I'm done for the most part. Only a few test cases go wrong (a few things out of the thousands of fed addresses that should be hitting are missing). I specify the cache properties on the command line. I suspect the error within my code has to do with the tag (if things aren't hitting then their tags aren't matching up when they should be). So my question is: Am I calculating the tag right? //setting sizes of

问题 I have the two following entities @Cachable class Book{ ... @ManyToOne Publisher publisher; } @Cachable{ class Publisher{ ... } I have the following test code, @Test public void test{ stats = sessionFactory.getStatstics(); ... Book book = session.byId(Book.class).load(1); Book book2 = session.byId(Book.class).load(1); assertEquals(stats.getSecondLevelCacheHitCount,0); assertEquals(stats.getSecondLevelCacheMissCount,1); assertEquals(stats.getSecondLevelCachePutCount,2); } Why the cache miss

问题 I'm using Redis to manage some caching within my Symfony 3.4 app, configured like this: config.yml framework: cache: default_redis_provider: 'redis://127.0.0.1:6379' pools: cache.catalog: adapter: cache.adapter.redis provider: iwid.custom_redis_provider default_lifetime: 86400 public: true cache.language: adapter: cache.adapter.redis provider: iwid.custom_redis_provider default_lifetime: 86400 public: true services.yml services: iwid.custom_redis_provider: class: Redis factory: ['Symfony

问题 I want to know when checking Cache compiled script if available checkbox is wrong, Following Best practices there are some situations that Cache compiled script shouldn't be used, but the example of not using ${varName} is wrong, I did a test and the value it's taking is the updated value of ${varName} and not the first value. When using JSR 223 elements, it is advised to check Cache compiled script if available property to ensure the script compilation is cached if underlying language

问题 On some android devices (regardless of the OS or Bluetooth version) there is a problem after BLE device connect. The services / characteristics are not up to date. This usually happens when the peripheral changes his services. (while the app was not connected) In this state, it is not possible to use the device. To verify this issue you can discover all characteristics and you see that there are outdated (no more existing) characteristics loaded from cache of the android device. Current

问题 On some android devices (regardless of the OS or Bluetooth version) there is a problem after BLE device connect. The services / characteristics are not up to date. This usually happens when the peripheral changes his services. (while the app was not connected) In this state, it is not possible to use the device. To verify this issue you can discover all characteristics and you see that there are outdated (no more existing) characteristics loaded from cache of the android device. Current

问题 I've been playing with the Google Web Starter Kit (https://github.com/google/web-starter-kit) and have got a little progressive web app working but am stuck on one thing: caching static files from external CDNs. E.g. I'm using MDL icons from https://fonts.googleapis.com/icon?family=Material+Icons I can't see a way to cache the request as the service worker only responds to URLs within my app domain. Options I see: 1. Download the file and put it in a vendor folder. Advantages: easy to set up

问题 So I have this question from my professor, and I can not figure out why vector2 is faster and has less cache misses than vector1 . Assume that the code below is a valid compilable C code. Vector2: void incrementVector2(INT4* v, int n) { for (int k = 0; k < 100; ++k) { for (int i = 0; i < n; ++i) { v[i] = v[i] + 1; } } } Vector1: void incrementVector1(INT4* v, int n) { for (int i = 0; i < n; ++i) { for (int k = 0; k < 100; ++k) { v[i] = v[i] + 1; } } } NOTE: INT4 means the integer is 4 Bytes

问题 REST allows to use etags for caching. Similarly browser supports caching unless headers like the following are set -> maxage, expires, cache-control: private What is difference between etags and the above mentioned caching approach? 回答1: What is difference between etags and normal browser provided caching? I think you will find that they are very different ideas. In HTTP, caching semantics are defined by RFC 7234: Caching. Entity tags are defined by RFC 7232: Conditional Requests An entity

问题 I am using camel 2.18.1 and the camel-ehcache component to build a simple cache. While the cache setup is working okay, I am finding it difficult to register mbeans using ehcache 3.1.2 ( this is pulled in via camel). Reading the documentations - it is not clear how one would enable support with 3.x as the standard way of registering mbeans using ManagementService is no longer available on the API. The documentation is a bit confusing with pure ehcache implementations and JSR-107 cache