HBase-每次flush的VESION个数的限制

Bertha 。 2022-12-09 04:54 124阅读 0赞

*  创建表

create 'stu10','info'

*  插入数据

put 'stu10','1003','info:name','xiaoxin'
    put 'stu10','1003','info:name','xiaoxin1'
    put 'stu10','1003','info:name','xiaoxin2'
    put 'stu10','1003','info:name','xiaoxin3'
    put 'stu10','1003','info:name','xiaoxin4'
    put 'stu10','1003','info:name','xiaoxin5'
    put 'stu10','1002','info:age','21'
    put 'stu10','1005','info:age','21'
    put 'stu10','1006','info:age','21'
    put 'stu10','1007','info:age','21'
    put 'stu10','1008','info:age','21'

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center]

*  修改版本为3

alter 'stu10',{ NAME=>'info',VERSIONS=>'3'}

发现只有1条数据了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center 1]

*  再次插入数据(7条)

put 'stu10','1009','info:age','21'
    put 'stu10','1009','info:age','23'
    put 'stu10','1009','info:age','24'
    put 'stu10','1009','info:age','25'
    put 'stu10','1009','info:age','26'
    put 'stu10','1009','info:age','27'
    put 'stu10','1009','info:age','28'

*  执行flush命令

flush 'stu10'

把最大的3个时间戳刷写到磁盘(storefile)  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center 2]

*  再次进行一次实验  
    插入数据

put 'stu10','1009','info:age','30'
    put 'stu10','1009','info:age','31'
    put 'stu10','1009','info:age','32'
    put 'stu10','1009','info:age','33'

刷写

flush 'stu10'

最新刷入的4条记录，刷写3个  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center 3]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/6c977bad2bcd401cbcd6a4373fe1d603.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/48b8fa3b05ea4d12978fb3d69d223d56.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221123/ecab7cd868d34fa1b51cc8878b5e4cec.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ2NTQ4ODU1_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221123/e88e5806c4b54753a12143aff8925cd5.png