問題描述

提高并發(fā)寫入嗎？ 磁盤io同一時(shí)刻只能寫入一個(gè)文件吧?提高并發(fā)讀取嗎？ 磁盤io同一時(shí)刻只能讀取一個(gè)文件吧？提高單次寫入速度嗎？貌似跟partiton沒啥關(guān)系吧？提高單次讀取速度嗎？多segment不就解決了？

問題解答

原答案：難道不是topic的擴(kuò)展能力嗎？不然單topic的容量只能限制在物理機(jī)上了更新后的答案：The partitions in the log serve several purposes. First, they allow the log to scale beyond a size that will fit on a single server. Each inpidual partition must fit on the servers that host it, but a topic may have many partitions so it can handle an arbitrary amount of data. Second they act as the unit of parallelism—more on that in a bit.官方文檔（見上文）。partitions 主要有兩個(gè)目的，1 增強(qiáng)擴(kuò)展能力，讓其可以處理任意多的數(shù)據(jù) 2 作為并行單元，提高并行能力（主要鑒于此點(diǎn)考慮）。第一次回答我只記住第一點(diǎn)了~~sorry