sphinx 增量索引与主索引使用测试

2013年10月28日 15:01:16

首先对新增的商品建立增量索引,搜索时只使用增量索引:

1 array (size=1)
2   0 => 
3     array (size=6)
4       'gid' => string '300233' (length=6)
5       'weight' => string '1500' (length=4)
6       'comweight' => float 1
7       'ge' => string '70' (length=2)
8       'ce' => string '34' (length=2)
9       'mysum' => string '104' (length=3)

View Code

新商品的id:300233 权重: 1500

然后重建主索引,搜索时只使用主索引:

 1 2 => 
 2     array (size=6)
 3       'gid' => string '300231' (length=6)
 4       'weight' => string '1690' (length=4)
 5       'comweight' => float 1
 6       'ge' => string '70' (length=2)
 7       'ce' => string '34' (length=2)
 8       'mysum' => string '104' (length=3)
 9   3 => 
10     array (size=6)
11       'gid' => string '300232' (length=6)
12       'weight' => string '1690' (length=4)
13       'comweight' => float 1
14       'ge' => string '70' (length=2)
15       'ce' => string '34' (length=2)
16       'mysum' => string '104' (length=3)
17   4 => 
18     array (size=6)
19       'gid' => string '300233' (length=6)
20       'weight' => string '1690' (length=4)
21       'comweight' => float 1
22       'ge' => string '70' (length=2)
23       'ce' => string '34' (length=2)
24       'mysum' => string '104' (length=3)

View Code

此时,那个新商品(id:300233)的权重变为 1690

再然后搜索时同时使用增量索引和主索引

 1 $sphObj->query($keyword, 'goods,goods_zl');
 2 
 3 2 => 
 4     array (size=6)
 5       'gid' => string '300231' (length=6)
 6       'weight' => string '1690' (length=4)
 7       'comweight' => float 1
 8       'ge' => string '70' (length=2)
 9       'ce' => string '34' (length=2)
10       'mysum' => string '104' (length=3)
11   3 => 
12     array (size=6)
13       'gid' => string '300232' (length=6)
14       'weight' => string '1690' (length=4)
15       'comweight' => float 1
16       'ge' => string '70' (length=2)
17       'ce' => string '34' (length=2)
18       'mysum' => string '104' (length=3)
19   4 => 
20     array (size=6)
21       'gid' => string '300233' (length=6)
22       'weight' => string '1500' (length=4)
23       'comweight' => float 1
24       'ge' => string '70' (length=2)
25       'ce' => string '34' (length=2)
26       'mysum' => string '104' (length=3)

View Code

此时的结果说明:增量索引中该新商品覆盖掉了主索引中的那个商品, but why!?

然后一个有意思的测试,在查询时调换下两个索引的前后顺序(第一行代码),结果:

 1 $sphObj->query($keyword, 'goods_zl,goods');
 2 
 3 2 => 
 4     array (size=6)
 5       'gid' => string '300231' (length=6)
 6       'weight' => string '1690' (length=4)
 7       'comweight' => float 1
 8       'ge' => string '70' (length=2)
 9       'ce' => string '34' (length=2)
10       'mysum' => string '104' (length=3)
11   3 => 
12     array (size=6)
13       'gid' => string '300232' (length=6)
14       'weight' => string '1690' (length=4)
15       'comweight' => float 1
16       'ge' => string '70' (length=2)
17       'ce' => string '34' (length=2)
18       'mysum' => string '104' (length=3)
19   4 => 
20     array (size=6)
21       'gid' => string '300233' (length=6)
22       'weight' => string '1690' (length=4)
23       'comweight' => float 1
24       'ge' => string '70' (length=2)
25       'ce' => string '34' (length=2)
26       'mysum' => string '104' (length=3)

View Code

结论,相同的商品在主索引和增量索引中只保留一个,根据查询语句中的顺序后者索引会覆盖掉前边索引里相同的商品(或文档)

还有诡异的事情,未完待续... ...