sphinx增量索引

首先建立一个计数表，保存数据表的最新记录ID

CREATE TABLE `sph_counter` (
  `id` int(11) unsigned NOT NULL,
  `max_id` int(11) unsigned NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='sphinx增量表最大记录数';

#定义主索引源

source test
{
    type                    = mysql
    sql_host                = localhost
    sql_user                = root
    sql_pass                = 8888
    sql_db                    = test
    sql_port                = 3306
    sql_query_pre            = SET NAMES utf8
    sql_query_pre           = REPLACE INTO sph_counter SELECT 1, MAX(id) FROM test where status=1 #取最大记录数

    sql_query = select id from test where id<(select max_id from sph_counter where id=1) and  status = 1

　##如果这里不加id<的条件，合并索引时会报字段数不匹配的错误

　#FATAL: failed to merge index 'test_delta' into index 'test': fulltext fields count mismatch (me=/usr/local/sphinx/var/data/test, in=/usr/local/sphinx/var/data/test_delta, myfields=4, infields=5)
    sql_query_info = select * from test where id = $id
}

#增量索引数据源定义
source test_delta : test
{
        sql_query_pre = SET NAMES utf8
        sql_query = select * from test  where id>=(select max_id from sph_counter where id=1) and status = 1
        sql_query_info = select * from test where id = $id

}

#定义主索引

index test
{
    source            = test            #对应的source名称
    path            = /usr/local/sphinx/var/data/test #请修改为实际使用的绝对路径，例如：/usr/local/coreseek/var/...
    docinfo            = extern
    mlock            = 0
    morphology        = none
    min_word_len        = 2
    html_strip                = 1

    #中文分词配置，详情请查看：http://www.coreseek.cn/products-install/coreseek_mmseg/
    charset_dictpath = /usr/local/mmseg/etc/ #BSD、Linux环境下设置，/符号结尾
    #charset_dictpath = etc/                             #Windows环境下设置，/符号结尾，最好给出绝对路径，例如：C:/usr/local/coreseek/etc/...
    charset_type        = zh_cn.utf-8
}
#定义增量索引
index test_delta:test
{
    source            = test_delta            #对应的source名称
    path            = /usr/local/sphinx/var/data/test_delta #请修改为实际使用的绝对路径，例如：/usr/local/coreseek/var/...
    docinfo            = extern
    mlock            = 0
    morphology        = none
    min_word_len        = 2
    html_strip                = 1

    #中文分词配置，详情请查看：http://www.coreseek.cn/products-install/coreseek_mmseg/
    charset_dictpath = /usr/local/mmseg/etc/ #BSD、Linux环境下设置，/符号结尾
    #charset_dictpath = etc/                             #Windows环境下设置，/符号结尾，最好给出绝对路径，例如：C:/usr/local/coreseek/etc/...
    charset_type        = zh_cn.utf-8
}

#全局index定义
indexer
{
    mem_limit            = 128M
}

#searchd服务定义
searchd
{
    listen                  =   9312
    read_timeout        = 5
    max_children        = 30
    max_matches            = 1000
    seamless_rotate        = 0
    preopen_indexes        = 0
    unlink_old            = 1
    pid_file = /usr/local/sphinx/var/log/searchd_mysql.pid  #请修改为实际使用的绝对路径，例如：/usr/local/coreseek/var/...
    log = /usr/local/sphinx/var/log/searchd_mysql.log        #请修改为实际使用的绝对路径，例如：/usr/local/coreseek/var/...
    query_log = /usr/local/sphinx/var/log/query_mysql.log #请修改为实际使用的绝对路径，例如：/usr/local/coreseek/var/...
    binlog_path =                                #关闭binlog日志
}

保存配置文件后退出，先停止searchd进程再启动，然后重新生成索引。

停止进程
/usr/local/sphinx/bin/searchd -c /usr/local/sphinx/etc/csft.conf --stop

启动进程
/usr/local/sphinx/bin/searchd -c /usr/local/sphinx/etc/csft.conf

重新生成所有索引
/usr/local/sphinx/bin/indexer -c /usr/local/sphinx/etc/csft.conf --all --rotate
增量索引
/usr/local/sphinx/bin/indexer -c /usr/local/sphinx/etc/csft.conf test_delta --rotate
合并索引
/usr/local/sphinx/bin/indexer -c /usr/local/sphinx/etc/csft.conf --merge test test_delta --rotate

如果合并索引时出现下面问题：

FATAL: failed to merge index 'test_delta' into index 'test': source index preload failed: failed to open /usr/local/sphinx/var/data/test_delta.sph: No such file or directory

停止searchd进程，然后重新启动searchd进程。

增量索引可以放在crontab里根据需要设置几分钟运行一次，然后执行索引合并，至于主索引重建可以选择在访问量不大或者半夜运行。

##每5分钟运行增量索引

*/5 * * * /usr/local/sphinx/bin/indexer -c /usr/local/sphinx/etc/csft.conf test_delta --rotate > /dev/null 2>&1

##每10分钟执行一次增量索引合并

*/10 * * * /usr/local/sphinx/bin/indexer -c /usr/local/sphinx/etc/csft.conf --merge test test_delta --rotate

##凌晨0点5分重新建立主索引

5 0 * * * /usr/local/sphinx/bin/indexer -c /usr/local/sphinx/etc/csft.conf --all --rotate > /dev/null 2>&1