About Data Sync option

Question

Hi All, 
 Could someone please help me understand the difference between data Sync and immediate data sync for record type. 
 I was referring " https://docs.appian.com/suite/help/20.4/Record_Type_Object.html#data-sync 
 
 and in that I am confused with the topics "Data sync" "Updating synced record types" 
 
 Under " Data sync" the below criteria is given: 
 You should only enable sync for your record type if: 
 
 Your source data changes infrequently outside of Appian and it doesn't need to be synced into Appian more than once a day.

Where under the topic "Updating synced record types" it talks about immediate update? 
 Thanks 
 Faisal

Peter Lewis · Accepted Answer

Yeah this is a good explanation. Just to add to this, I think the key phrase in the documentation is that "Your source data changes infrequently outside of Appian ..." Let's contrast different ways that the sync could work with a few examples: 
 
 Example 1 : Suppose you have a Web Service that you would like to sync into Appian that contains a reference list of products used in your application. The source data in this web service changes infrequently (and is not updated by Appian), so the sync runs once per day to add any new products to the cache stored in Appian. 
 Example 2 : Suppose you have a database table that you would like to sync into Appian. This database table contains a list of claims made for each product and rows are inserted / updated entirely in Appian. In this case, the sync will always have the current data because any insert or update using the Write to Data Store Entity will also sync the data into the cache. 
 
 Both of these examples are good use cases for using the sync but they just work differently; Example 1 syncs once a day, but the data changes infrequently, and Example 2 will always have the current data synced.

juergeng393 · Answer

Hi Faisal,
you might think about the data sync like a cache. The size limit of the cache is 100,000 rows. Appian loads data from the original source into the cache to speed up the access time for record retrievals. This sync happens once a day. So your users should be good with this fact and not expecting 'real time' data.

The immediate sync happens when Appian is updating the original data source. This triggers that the cache gets updated too.

I hope this make sense.

About Data Sync option

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