What does rollback feature mean

The action of saving the data is a commit; this allows subsequent queries for this data to show the new values. However, a user may decide not to save the data. Under this condition, a rollback command manipulates the data to discard any changes made by the user, and does so without communicating this to the user. Thus, a rollback occurs when a user begins changing data, realizes the wrong record is being updated and then cancels the operation to undo any pending changes.

Rollbacks also may be issued automatically after a server or database crash, e. When the database restarts, all logged transactions are reviewed; then all pending transactions are rolled back, allowing users to reenter and save appropriate changes.

By: Justin Stoltzfus Contributor, Reviewer. By: Satish Balakrishnan. Dictionary Dictionary Term of the Day. Natural Language Processing. How do rollback features work and when should I use them?

How do roll back features work on Deployment Manager? For pega versions 8. Be careful about using restore when there are multiple independent applications on the system. For pega version 8. How do I rollback a successful deployment?

Abort if you think there is no harm in keeping in the current deployment that failed in the environment perhaps this is true in QA or other isolated testing environments if there are other applications being deployed into that environment and you want to avoid rolling back those application changes as well. Currently rollback is environment wide and will affect all users and applications.

Like 0. Would like to confirm if Deployment Manager does Rolback on database changes? Likes 1. Thank you. Related content: Question Deployment Manager Rollback Feature Question How to map work objects to new data table and how to access them?

When a retailer announces a sale, it is normally on a group of items store-wide sale, sale on apparel items, seasonal item markdown sale, etc. Even if the sale is on one item for example tires or candles , multiple brands carrying those items might fall under the sale.

A Walmart Rollback is for a specific item. Each Rollback offer is unique to the individual item. Marking an item down for the purpose of selling it at Clearance is also different from a Rollback. Walmart does have clearance items. These are usually items the company will no longer carry, overstocks, or items past their seasonal relevance. Items on Rollback are permanent store items. They will be restocked when sold through. While clearance items can sometimes not be returned, Rollback items can be returned as they are staple store items.

Also, Rollback items will return to their normal price at the end of the Rollback period; clearance items may be marked down lower to promote sell-through. All that being said, a Rollback item can become a clearance item. When Walmart sets a Rollback price on an item, the company expects the item sales to increase.

If the item fails to sell, Walmart may determine it has no place on the shelf. The company will then lower the price again and add it to clearance. Customers can find items on Walmart. The items are flagged as Rollback and also include the current and previous prices. Items qualified for Rollback pricing must have a history of being sold in Walmart. In other words, an item new to Walmart can not be debuted on Rollback. Before working with a Walmart buyer to place an item on Rollback, suppliers should be prepared to analyze sales during the Rollback period.

What happens can dictate actions taken by Walmart or the supplier once the Rollback period ends:. With most Rollbacks, items are returned to their normal price.