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... ...