dirty read 中文意思是什麼
dirty read
解釋
錯讀, 亂讀-
Read uncommitted ? permits dirty reads but not lost updates
未授權讀取允許臟讀取，但不允許更新丟失。 -
A dirty read is possible, meaning that no shared locks are issued and no exclusive locks are honored
可以進行臟讀，意思是說，不發布共享鎖，也不接受獨占鎖。 -
When this option is set, it is possible to read uncommitted modifications, which are called dirty reads
設置此選項之後，可以讀取未提交的修改，這種讀取稱為臟讀。 -
Dirty read : thread one writes data ; thread two reads what thread one wrote
線程1寫入了數據，線程2讀取了線程1所寫入的數據。 -
Dirty read : thread one writes data ; thread two reads what thread one wrote. thread one then overwrites the data, thus leaving thread two with old data
線程1寫入了數據，線程2讀取了線程1所寫入的數據。線程1更改了數據，最後線程2讀取的是沒有更新的舊數據。 -
We intercept and capture the read and write system calls via putting the nvram on the request queue. then observing the capacity of the " dirty " data, we redirect the writing direction to the hard disk while detecting the proportion of the " dirty " data exceeds the limit
通過文件系統對數據讀寫操作流程的分析，在系統的request隊列中將其讀寫的對象置換為nvram ，從而實現數據讀寫的截取和轉向，然後對nvram的臟數據容量進行檢測，當其到達nvram容量的一定比例后，調用相應的程序把臟數據對外設回寫。
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