我忙於實施Solr的網站關於度假屋。該網站使用Postgres作爲主數據庫。對於搜索結果,我們希望使用Solr作爲後端來獲取可用的度假屋。Solr導入鎖定表中的postgres
通過將DataImportHandler與JdbcDataSource一起使用來導入數據庫的某些部分。
的DataImportHandler的縮短版:
<?xml version="1.0" encoding="UTF-8"?>
<dataConfig>
<dataSource type="JdbcDataSource" driver="org.postgresql.Driver" name="Solr"
url="jdbc:postgresql://host:port/database" user="*" password="*" readOnly="true"/>
<document>
<entity name="availabilities" transformer="RegexTransformer" pk="id"
query="
SELECT concat('A',pa.availability_id,'-',pad.start_date,'-',pad.period_type_id) as unique_availability_id,
pa.property_id,
NULLIF(CONCAT(ST_X(pl.position),',',ST_Y(pl.position)),',') as locationhash,
pl.position_accurate,
true as is_availability,
region.child_id as city_id,
region.ancestor_id as province_id,
(
SELECT array_to_string(array(SELECT binnen.ancestor_id
FROM fewo_Location_Ancestry binnen
WHERE binnen.child_id = region.child_id
AND binnen.ancestor_type_id = 12), ',')
) AS region_id,
pl.country_id,
pl.min_persons,
pl.max_persons,
fap.bedrooms,
pl.specifications,
pl.property_state_id,
pa.availability_id,
pad.period_type_id,
pad.start_date,
pad.end_date,
(
SELECT COUNT(*) > 0 FROM fewo_last_minute_details flmd
WHERE flmd.property_id = pa.property_id
AND flmd.details_id = pad.details_id
LIMIT 1
) AS last_minute,
CASE (
SELECT COUNT(*) > 0 FROM fewo_last_minute_details flmd
WHERE flmd.property_id = pa.property_id
AND flmd.details_id = pad.details_id
LIMIT 1
) WHEN true THEN pad.discount_price
ELSE pad.price
END as price,
pl.positioning_fee,
pl.sort_order
FROM fewo_property_availability_details pad
INNER JOIN fewo_property_availability pa USING (availability_id)
INNER JOIN fewo_Property_Location pl ON pa.property_id=pl.property_id
INNER JOIN fewo_all_properties fap ON pl.property_id=fap.property_id
INNER JOIN fewo_Location_Ancestry region ON (region.child_id =pl.location_id AND region.ancestor_type_id = 7)
WHERE pad.start_date > current_date
">
<field name="id" column="unique_availability_id"/>
<field name="property_id" column="property_id"/>
<field name="parent_id" column="property_id"/>
<field name="is_availability" column="is_availability"/>
<field name="positionCoord" column="locationhash"/>
<field name="position_accurate" column="position_accurate"/>
<field name="city_id" column="city_id"/>
<field name="province_id" column="province_id"/>
<field name="region_id" column="region_id" splitBy="," sourceColName="region_id"/>
<field name="country_id" column="country_id"/>
<field name="min_persons" column="min_persons"/>
<field name="max_persons" column="max_persons"/>
<field name="bedrooms" column="bedrooms"/>
<entity name="fewo_all_property_specifications" transformer="foo.SpecTransformer" pk="property_id"
cacheKey="property_id"
cacheLookup="availabilities.property_id"
query="SELECT property_id, specification_id, COALESCE(value,'true') as val FROM fewo_all_property_specifications"
processor="CachedSqlEntityProcessor">
</entity>
<field name="property_state_id" column="property_state_id"/>
<field name="availability_id" column="availability_id"/>
<field name="period_type_id" column="period_type_id"/>
<field name="start_date" column="start_date"/>
<field name="end_date" column="end_date"/>
<field name="last_minute" column="last_minute" />
<field name="price" column="price"/>
<field name="positioning_fee" column="positioning_fee"/>
<field name="sort_order" column="sort_order"/>
</entity>
</document>
</dataConfig>
約一小時,以進口1300萬條記錄到Solr的進口運行。問題在於,在導入期間,無法更新表fewo_property_availability_details,因爲有一個AccessShareLock鎖定表。這可以防止更新/插入數據到表中,並且這些查詢會排隊。一段時間後,它們堆積太多,數據庫失敗。
我的問題是:有沒有一種很好的方式來導入數據,而不會妨礙常規查詢太多?像在x個導入的記錄之後開始一個新的交易也給其他查詢時間運行?
我使用在Ubuntu 12.04上運行的Solr 4.0和Postgres 9.1。
由於