通过OneBox体验Tera

为了最快速度体验Tera，Tera提供一个OneBox方式布署，利用本地存储代替DFS，利用本地文件模拟ZK，单机多进程运行master、tabletnode。此模式下可正常使用Tera的全部功能，包括（不限于）：

  • 表格新建(create)、schema修改(update)、删除(drop)、卸载(disable)、加载(enable)等
  • 数据写入(put)、删除(delete)、随机读(get)、顺序读(scan)等
  • 数据分片分裂(split)、合并(merge)、负载均衡(move)等

准备工作

  1. 完成Tera的编译，请参考：https://github.com/baidu/tera/wiki/Build-Manual
  2. 将编译生成的tera_master, tabletserver, teracli三个二进制文件放入example/onebox/bin
  3. 如有需要，通过修改example/onebox/bin/config中的选项配置tabletnode个数
  4. 进入example/onebox/bin/目录

启动、停止Tera

  • 执行./launch_tera.sh即可启动Tera
    1. [tera@localhost bin]$ sh launch_tera.sh 
    2. launching tabletnode 1...
    3. launching tabletnode 2...
    4. launching tabletnode 3...
    5. launching master...
  • 执行./kill_tera.sh即可停止Tera

体验开始！

如果启动正常，尝试查看集群基本信息: ./teracli show

  1. [tera@localhost bin]$ ./teracli show
  2.      tablename   status        size   lg_size  tablet  notready
  3. -----------------------------------------------------------------
  4.   0  meta_table  kTableEnable  4.01K  4.01K    1       0       
  5.   1  stat_table  kTableEnable  4K     4K       1       0       
  6.   -  total       -             8.01K  -        2       0

查看更详细的表格信息：./teracli showx

  1. [tera@localhost bin]$ ./teracli showx
  2.      tablename   status        size    lg_size  tablet  notready  lread  read  rmax  rspeed  write  wmax  wspeed  scan  smax  sspeed
  3. --------------------------------------------------------------------------------------------------------------------------------------
  4.   0  meta_table  kTableEnable  4.01K   4.01K    1       0         0      0     0     0B/s    0      0     0B/s    0     0     0B/s  
  5.   1  stat_table  kTableEnable  28.06K  28.06K   1       0         0      0     0     0B/s    0      0     0B/s    0     0     0B/s  
  6.   -  total       -             32.07K  -        2       0         0      0     -     0B/s    0      -     0B/s    0     -     0B/s

查看当前有哪些存活的tabletnode: ./teracli showts

  1. [tera@localhost bin]$ ./teracli showts
  2.      address         status  workload  tablet  load  busy
  3. -----------------------------------------------------------
  4.   0  127.0.0.1:7701  kReady  4.01K     1       0     0   
  5.   1  127.0.0.1:7702  kReady  32.06K    1       0     0   
  6.   2  127.0.0.1:7703  kReady  0         0       0     0

查看更详细的tabletnode信息：./teracli showtsx

  1. [tera@localhost bin]$ ./teracli showtsx
  2.      address         status  size    num  lread  r  rspd  w  wspd  s  sspd  rdly  rp  wp  sp  ld  bs  mem     cpu  net_tx  net_rx  dfs_r  dfs_w
  3. -------------------------------------------------------------------------------------------------------------------------------------------------
  4.   0  127.0.0.1:7701  kReady  4.01K   1    0      0  0B    0  0B    0  0B    0ms   0   0   0   0   0   12.10M  0    12.11K  5.57K   0      0    
  5.   1  127.0.0.1:7702  kReady  32.06K  1    0      0  0B    0  0B    0  0B    0ms   0   0   0   0   0   11.83M  0    12.11K  5.57K   0      0    
  6.   2  127.0.0.1:7703  kReady  0       0    0      0  0B    0  0B    0  0B    0ms   0   0   0   0   0   11.08M  0    12.11K  5.57K   0      0

新建一个表格hello，包含两个列族cf0和cf1: ./teracli create 'hello{cf0,cf1}'

  1. [tera@localhost bin]$ ./teracli create 'hello{cf0,cf1}'
  2.   hello <splitsize=512,mergesize=0> {
  3.       lg0 <storage=disk> {
  4.           cf0,
  5.           cf1,
  6.       },
  7.   }
  8. [tera@localhost bin]$ ./teracli show
  9.      tablename   status        size    lg_size  tablet  notready
  10. ------------------------------------------------------------------
  11.   0  hello       kTableEnable  4.01K   4.01K    1       0       
  12.   1  meta_table  kTableEnable  4.01K   4.01K    1       0       
  13.   2  stat_table  kTableEnable  44.12K  44.12K   1       0       
  14.   -  total       -             52.14K  -        3       0

写入一条数据(列族是cf0，列是column1): ./teracli put hello row1 cf0:column1 value1

随机读出刚写入的数据： ./teracli get hello row1

  1. [tera@localhost bin]$ ./teracli get hello row1                    
  2. row1:cf0:column1:1477367889042685:value1

多写一些数据：

  1. [tera@localhost bin]$ ./teracli put hello row2 cf1:column0 value2   
  2. [tera@localhost bin]$ ./teracli put hello row2 cf1:column1 value3 
  3. [tera@localhost bin]$ ./teracli put hello row0 cf1:column1 value0

顺序读出整个表格的数据： ./teracli scan hello "" ""

  1. [tera@localhost bin]$ ./teracli scan hello "" ""
  2. row0:cf1:column1:1477368174895134:value0
  3. row1:cf0:column1:1477367889042685:value1
  4. row2:cf1:column0:1477368164358077:value2
  5. row2:cf1:column1:1477368169176632:value3

卸载表格： ./teracli disable hello

  1. [tera@localhost bin]$ ./teracli disable hello
  2. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 100%  1.000  1.000/s  00:00:01 
  3. [tera@localhost bin]$ ./teracli show         
  4.      tablename   status         size    lg_size  tablet  notready
  5. -------------------------------------------------------------------
  6.   0  hello       kTableDisable  4.01K   4.01K    1       0       
  7.   1  meta_table  kTableEnable   4.01K   4.01K    1       0       
  8.   2  stat_table  kTableEnable   44.12K  44.12K   1       0       
  9.   -  total       -              52.14K  -        3       0

删除表格： ./teracli drop hello

  1. [tera@localhost bin]$ ./teracli drop hello
  2. [tera@localhost bin]$ ./teracli show      
  3.      tablename   status        size    lg_size  tablet  notready
  4. ------------------------------------------------------------------
  5.   0  meta_table  kTableEnable  4.01K   4.01K    1       0       
  6.   1  stat_table  kTableEnable  44.12K  44.12K   1       0       
  7.   -  total       -             48.13K  -        2       0

写在最后

Tera onebox模式可以体验几乎所有的功能特性，希望通过上面的介绍可以让大家对Tera有一个初步的认识。