hdfs中block默认保存几个备份

页面:/news/view-1084627/ | 耗时:0.7914 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1084627 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1084627 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1084627 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1235850,778152,2644070,3088741,1233992,1735134,2758821,3482941,989160,3189361,869260,2598458,1179672,3156412,388077,2809726,98864,1229682,3188248,1254379,3472127,2712765,2729566,616898,1772492,1192781,566901,84556,566773,2490485) ORDER BY field (ArticleID,1235850,778152,2644070,3088741,1233992,1735134,2758821,3482941,989160,3189361,869260,2598458,1179672,3156412,388077,2809726,98864,1229682,3188248,1254379,3472127,2712765,2729566,616898,1772492,1192781,566901,84556,566773,2490485)