Views and Snapshots Can you give some specific examples of h

Views and Snapshots: Can you give some specific examples of how views and snapshots may be useful to us? Any examples in any applications you support, have developed, or work with?

Solution

A info photograph may be a read-only, static read of a SQL Server info . The info photograph is dealing ally per the supply info as of the instant of the snapshot\'s creation. An info photograph invariably resides on constant server instance as its supply info. because the supply info is updated, the info photograph is updated. Therefore, the longer a info photograph exists, the additional seemingly it\'s to assign its obtainable disc space. Multiple snapshots will exist on a given supply info. Every info photograph persists till it\'s expressly born by the info owner. Database photographs square measure unrelated to snapshot backups, photograph isolation of transactions, or photograph replication. Snapshots will be used for news functions. Clients will question a info photograph, that makes it helpful for writing reports supported the information at the time of photograph creation. Maintaining historical information for report generation. A photograph will extend user access to information from a specific purpose in time. as an example, you\'ll produce a info photograph at the tip of a given fundamental quantity for later news. You’ll then run end-of-period reports on the photograph. If disc space permits, you\'ll conjointly maintain end-of-period snapshots indefinitely, permitting queries against the results from these periods; as an example, to research structure performance. Using mirror info that you simply square measure maintaining for accessibility functions to dump news. Using info snapshots with info mirroring permits you to form the information on the mirror server accessible for news. To boot, running queries on the mirror info will release resources on the principal. For additional data, see info Mirroring and info Snapshots (SQL Server). Safeguarding information against body error. In the event of a user error on supply info, you\'ll revert the supply info to the state it absolutely was in once a given info photograph was created. Information loss is confined to updates to the info since the snapshot\'s creation. Memory leaks will and do happen in garbage collected languages like JavaScript. These will go unnoted for a few times, and eventually they\'re going to make for mayhem. For this reason, memory identification tools square measure essential for locating memory leaks. Identification runs ought to be a part of the event cycle, particularly for middle or big-sized applications. Begin doing this to relinquish your users the most effective potential expertise. Realize a leak we are going to currently head to the profiles section of Chrome\'s Dev Tools. to stay memory use in manageable levels, reload the page before doing this step. We are going to use the Take Heap photograph operates. Reload the page and take a heap photograph right when it finishes loading. we are going to use this photograph as our baseline. After that, hit The Button once more, wait some seconds, and take a second photograph. When the photograph is taken, it\'s judicious to line a breakpoint within the script to prevent the leak from exploitation additional memory. This is the read you may pay most of the time viewing. The profiles read permit you to urge a photograph and compare snapshots of the memory use of your JavaScript code. It conjointly permits you to record allocations on time. In each result read differing types of lists square measure obtainable, however the foremost relevant ones for our task square measure the outline list and also the comparison list.