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?
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