从单个表读取的多个微型服务或控制台应用程序
我需要通过微服务从SQLServer表中读取数百万个记录，该微服务确实可以并行读取。每个实例化的微服务在同一DB的同一表上执行相同的读取操作。您可以用来避免复制记录的最佳方法是什么？ 通过重复记录，我的意思是不处理 /收集已经由同一服务的其他实例收集 /处理的记录，
我可以使用此方法吗？从每个微服务中进行选择，例如：
BEGIN TRANSACTION;
SELECT ITEM_ID
FROM TABLE_ITEM
WITH(XLOCK, ROWLOCK)
WHERE ITEM_PRIORITY > 10 AND ITEM_CATEGORY = 'CT1' AND ITEM_STATUS = 'available' AND ROWNUM = 1;
UPDATE [locked item_id] SET ITEM_STATUS = 'unavailable';
COMMIT TRANSACTION;
I need to read millions of records from a sqlserver table through a microservice that does block reads in parallel. each instantiated microservice performs the same read operation on the same table of the same DB. what is the best approach you can use to avoid taking duplicate records?
By duplicate records I mean not to process / collect records that have already been collected / processed by other instances of the same service
Can I use this approach? make selections from each microservice such as the following:
BEGIN TRANSACTION;
SELECT ITEM_ID
FROM TABLE_ITEM
WITH(XLOCK, ROWLOCK)
WHERE ITEM_PRIORITY > 10 AND ITEM_CATEGORY = 'CT1' AND ITEM_STATUS = 'available' AND ROWNUM = 1;
UPDATE [locked item_id] SET ITEM_STATUS = 'unavailable';
COMMIT TRANSACTION;
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