php 将15W的数据写入文件
程序的逻辑
1,通过ftp下载300MB左右的文件 数据大概是15W条左右
2,过滤字段,重新写入数据库中
①,先将数据写到文件中
②,mysql使用load_data_infile 来插入数据
现在写入文件的程序逻辑:
读取一行数据
然后过滤字段,加入数组 到了1000条写入数据库
写入数据有点慢....有什么能加快速度吗
补充下:整条数据有234个字段
回复内容：
程序的逻辑
1,通过ftp下载300MB左右的文件 数据大概是15W条左右
2,过滤字段,重新写入数据库中
①,先将数据写到文件中
②,mysql使用load_data_infile 来插入数据
现在写入文件的程序逻辑:
读取一行数据
然后过滤字段,加入数组 到了1000条写入数据库
写入数据有点慢....有什么能加快速度吗
补充下:整条数据有234个字段
量也不大，写文件的部分没有代码，看不出来什么问题，猜一下吧: 把 fopen 拿到循环外。
写数据库的话，插入的时候用事务。
插入的时候使用存储过程。
把文件拆分成N个小的文件，开N个php进程跑，不就快了？或者直接上java之类的支持多线程的程序跑。
为啥要在循环里面iconv一下？直接放到外面的转编码不行吗
话说，15W条数据，你组合成sql， 1W条一次的写入，写就几秒钟的时间，何必纠结搞什么文件再load_data_infile 呢？
按行操作实在太小气了，如果文件大小有上限的话，干脆用file_get_contents 和 file_put_contents来读写，效率会高很多。
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