diff --git a/2014/12/24/MFC 模态对话框/index.html b/2014/12/24/MFC 模态对话框/index.html index 47789d2228..15e99d9abb 100644 --- a/2014/12/24/MFC 模态对话框/index.html +++ b/2014/12/24/MFC 模态对话框/index.html @@ -301,16 +301,16 @@
pcre-intro-and-a-simple-package
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    Reverse Integer
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    two sum
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    leetcode no.3
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    Number of 1 Bits
  • Path Sum
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    Number of 1 Bits
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    Reverse Bits
    • diff --git a/2014/12/30/Clone-Graph-Part-I/index.html b/2014/12/30/Clone-Graph-Part-I/index.html index 5e7a7660e3..5d43a9f665 100644 --- a/2014/12/30/Clone-Graph-Part-I/index.html +++ b/2014/12/30/Clone-Graph-Part-I/index.html @@ -35,8 +35,8 @@ - + @@ -300,16 +300,16 @@
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  • G1收集器概述
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  • 聊聊我刚学会的应用诊断方法
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    Clone Graph Part I
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    diff --git a/2020/02/09/G1收集器概述/index.html b/2020/02/09/G1收集器概述/index.html index e13e9c1657..a795c13bba 100644 --- a/2020/02/09/G1收集器概述/index.html +++ b/2020/02/09/G1收集器概述/index.html @@ -245,11 +245,11 @@ , - + , - + , @@ -318,9 +318,6 @@
  • JVM源码分析之G1垃圾收集器分析一
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  • Comparator使用小记
    • @@ -330,6 +327,9 @@
  • 聊聊我刚学会的应用诊断方法
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    Clone Graph Part I
    +
    • @@ -372,9 +372,9 @@
    - + diff --git a/2020/04/26/聊聊-mysql-的-MVCC/index.html b/2020/04/26/聊聊-mysql-的-MVCC/index.html index 5d588a906d..adcc16034c 100644 --- a/2020/04/26/聊聊-mysql-的-MVCC/index.html +++ b/2020/04/26/聊聊-mysql-的-MVCC/index.html @@ -252,11 +252,11 @@ , - + , - + , diff --git a/2020/05/02/聊聊-mysql-的-MVCC-续篇/index.html b/2020/05/02/聊聊-mysql-的-MVCC-续篇/index.html index 2e5f619492..9d6d763cf1 100644 --- a/2020/05/02/聊聊-mysql-的-MVCC-续篇/index.html +++ b/2020/05/02/聊聊-mysql-的-MVCC-续篇/index.html @@ -257,11 +257,11 @@ , - + , - + , diff --git a/2020/05/10/聊聊-mysql-的-MVCC-续续篇之加锁分析/index.html b/2020/05/10/聊聊-mysql-的-MVCC-续续篇之加锁分析/index.html index 509477403d..5f6afb0b37 100644 --- a/2020/05/10/聊聊-mysql-的-MVCC-续续篇之加锁分析/index.html +++ b/2020/05/10/聊聊-mysql-的-MVCC-续续篇之加锁分析/index.html @@ -253,11 +253,11 @@ , - + , - + , diff --git a/2020/05/17/聊聊我理解的分布式事务/index.html b/2020/05/17/聊聊我理解的分布式事务/index.html index dd82671429..9d9ec73c9d 100644 --- a/2020/05/17/聊聊我理解的分布式事务/index.html +++ b/2020/05/17/聊聊我理解的分布式事务/index.html @@ -34,7 +34,7 @@ - + @@ -231,10 +231,16 @@ Posted on - - + + + + + + Edited on + + @@ -318,6 +324,7 @@
  • 第二是协调者的单点问题，万一挂了，参与者就会在那傻等着

    • 所以三阶段提交引入了各节点的超时机制和一个准备阶段，首先是一个can commit阶段，询问下各个节点有没有资源，能不能进行操作，这个阶段不阻塞，只是提前做个摸底，这个阶段其实人畜无害，但是能提高成功率，在这个阶段如果就有节点反馈是不接受的，那就不用执行下去了，也没有锁资源，然后第二阶段是 pre commit ，这个阶段做的事情跟原来的 第一阶段比较类似，然后是第三阶段do commit，其实三阶段提交我个人觉得只是加了个超时，和准备阶段，好像木有根本性的解决的两阶段提交的问题，后续可以再看看一些论文来思考讨论下。

    +

    2020年05月24日22:11 更新
    这里跟朋友讨论了下，好像想通了最核心的一点，对于前面说的那个场景，如果是两阶段提交，如果各个节点中有一个没回应，并且协调者也挂了，这个时候会有什么情况呢，再加一个假设，其实比如这个一阶段其实是检验就失败的，理论上应该大家都释放资源，那么对于这种异常情况，其他的参与者就不知所措了，就傻傻地锁着资源阻塞着，那么三阶段提交的意义就出现了，把第一阶段拆开，那么即使在这个阶段出现上述的异常，即也不会锁定资源，同时参与者也有超时机制，在第二阶段锁定资源出现异常是，其他参与者节点等超时后就自动释放资源了，也就没啥问题了，不过对于那种异常恢复后的一些情况还是没有很好地解决，需要借助 zk 等，后面有空可以讲讲 paxos 跟 raft 等

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    +
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    + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + - Category: docker | Nicksxs's Blog + Category: Docker | Nicksxs's Blog - - - - - - -id.slice(0, 8).toLowerCase()}.api.lncldglobal.com`; - - if (api_server) { - fetchData(api_server); - } else { - fetch('https://app-router.leancloud.cn/2/route?appId=' + app_id) - .then(response => response.json()) - .then(({ api_server }) => { - fetchData('https://' + api_server); - }); - } - })(); - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Tag: Redis | Nicksxs's Blog + Tag: redis | Nicksxs's Blog - - - - - - -ut', '/classes/Counter/' + counter.objectId, { time: { '__op': 'Increment', 'amount': 1 } }) - .catch(error => { - console.error('Failed to save visitor count', error); - }); - } else { - leancloudSelector(url).innerText = 'Counter not initialized! More info at console err msg.'; - console.error('ATTENTION! LeanCloud counter has security bug, see how to solve it here: https://github.com/theme-next/hexo-leancloud-counter-security. \n However, you can still use LeanCloud without security, by setting `security` option to `false`.'); - - } - }) - .catch(error => { - console.error('LeanCloud Counter Error', error); - }); - } - - function showTime(Counter) { - var visitors = document.querySelectorAll('.leancloud_visitors'); - var entries = [...visitors].map(element => { - return decodeURI(element.id); - }); - - Counter('get', '/classes/Counter?where=' + encodeURIComponent(JSON.stringify({ url: { '$in': entries } }))) - .then(response => response.json()) - .then(({ results }) => { - for (let url of entries) { - let target = results.find(item => item.url === url); - leancloudSelector(url).innerText = target ? target.time : 0; - } - }) - .catch(error => { - console.error('LeanCloud Counter Error', error); - }); - } - - let { app_id, app_key, server_url } = {"enable":true,"app_id":"ysza182Vghlqjdt7QiwGLLJy-gzGzoHsz","app_key":"s9GDqbn7gnGGkusf66YRVccw","server_url":"https://leancloud.cn","security":true}; - function fetchData(api_server) { - var Counter = (method, url, data) => { - return fetch(`${api_server}/1.1${url}`, { - method, - headers: { - 'X-LC-Id' : app_id, - 'X-LC-Key' : app_key, - 'Content-Type': 'application/json', - }, - body: JSON.stringify(data) - }); - }; - if (CONFIG.page.isPost) { - if (CONFIG.hostname !== location.hostname) return; - addCount(Counter); - } else if (document.querySelectorAll('.post-title-link').length >= 1) { - showTime(Counter); - } - } - - let api_server = app_id.slice(-9) !== '-MdYXbMMI' ? server_url : `https://${app_id.slice(0, 8).toLowerCase()}.api.lncldglobal.com`; - - if (api_server) { - fetchData(api_server); - } else { - fetch('https://app-router.leancloud.cn/2/route?appId=' + app_id) - .then(response => response.json()) - .then(({ api_server }) => { - fetchData('https://' + api_server); - }); - } - })(); - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Tag: C | Nicksxs's Blog + Tag: c++ | Nicksxs's Blog - - - - - - -     - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Tag: Java | Nicksxs's Blog + Tag: java | Nicksxs's Blog + + + + + + + body: JSON.stringify(data) + }); + }; + if (CONFIG.page.isPost) { + if (CONFIG.hostname !== location.hostname) return; + addCount(Counter); + } else if (document.querySelectorAll('.post-title-link').length >= 1) { + showTime(Counter); + } + } + + let api_server = app_id.slice(-9) !== '-MdYXbMMI' ? server_url : `https://${app_id.slice(0, 8).toLowerCase()}.api.lncldglobal.com`; + + if (api_server) { + fetchData(api_server); + } else { + fetch('https://app-router.leancloud.cn/2/route?appId=' + app_id) + .then(response => response.json()) + .then(({ api_server }) => { + fetchData('https://' + api_server); + }); + } + })(); + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +