Google Quick Search Box Download Cache __FULL__
Raphael Dyen
At first I used generic List and Dictionary>key, value> as a cache.I tried IMemoryCache from .NET but I got the feeling it does not fit on my problem.Also I tried using hash, but that does not work because the object in my cache has a different has than a other object with same values.My current solution is faster (nearly double speed) than posting every object into the database but still far to slow.When I post a object to the database I get the key as return. This key I also need in the further code.
I have a website that allows users to query for specific recipes using various search criteria. For example, you can say "Show me all recipes that I can make in under 30 minutes that will use chicken, garlic and pasta but not olive oil."
The actual database query itself is fairly expensive, and there's a lot of default search templates that would be used quite frequently. For this reason, I'd like to start caching common queries. I've done a little investigation into various caching technologies and read plenty of other SO posts on the subject, but I'm still looking for advice on which way to go. Right now, I'm considering the following options:
I've also looked into some other third party cache providers such as NCache and Velocity. These are both distributed cache providers and are probably completely overkill for what I need at the moment. Plus, it seems every cache system I've seen still requires objects to be keyed by a string. Ideally, I want something that holds a cache in process, allows me to key by an object's hash value, and allows me to control expiration times and priorities.
Based on what you are saying, I recommend you use System.Web.Caching and build that into your DataAccess layer shielding it from the rest of you system. When called you can make your real time query or pull from a cached object based on your business/application needs. I do this today, but with Memcached.
An in-memory cache should be pretty easy to implement. I can't think of any reason why you should have particular concerns about validating the uniqueness of a SearchQuery object versus any other - that is, while the key must be a string, you can just store the original object along with the results in the cache, and validate equality directly after you've got a hit on the hash. I would use System.Web.Caching for the benefits you've noted (expiration, etc.). If there happened to be a collision, then the 2nd one would just not get cached. But this would be extremely rare.
Also, the amount of memory needed to store search results should be trivial. You don't need to keep the data of every single field, of every single row, in complete detail. You just need to keep a fast way to access each result, e.g. an int primary key.
Finally, if there are possibly thousands of results for a search that could be cached, you don't even need to keep an ID for each one - just keep the first 100 or something (as well as the total number of hits). I suspect if you analyzed how people use search results, it's a rare person that goes beyond a few pages. If someone did, then you can just run the query again.
So basically you're just storing a primary key for the first X records of each common search, and then if you get a hit on your cache, all you have to do is run a very inexpensive lookup of a handful of indexed keys.
It seems that the Cache class stores the cached items in an internal dictionary, which uses the key's hash. Keys (query text) with the same hash would end-up in the same bucket in the dictionary, where its just a quick linear search to find the required one when do a cache lookup. So I think you'd be okay with long key strings.
Learn how to search text in PDFs using Adobe Acrobat. If you work with multiple PDFs, learn to index PDFs for faster searches. You can define PDFs as a catalog in Acrobat Pro, which generates a PDF index for all the PDFs. This index, when used to search in PDFs drastically accelerates searches. Learn how to search across multiple documents simultaneously.
You run searches to find specific items in PDFs. You can run a simple search, looking for a search term within a single file, or a more complex search, looking for various kinds of data in one or more PDFs. You can search using either the Search window or the Find toolbar. Acrobat searches the PDF body text, layers, form fields, and digital signatures in either case. You can also include bookmarks and comments in the search. Only the Find toolbar includes a Replace With option.
When you type the first few letters to search in a PDF, Acrobat provides suggestions for the matching word and its frequency of occurrence in the document. When you select the word, Acrobat highlights all the matching results in the PDF.
Use the Search window to search words or document properties across multiple PDFs, use advanced search options, and search PDF indexes. For example, you can search across all PDFs in a specific location or all files in an open PDF Portfolio. The Replace With option isn't available in the Search window.
If documents are encrypted for security, you cannot search them as part of a multiple-document search. Open those documents first and search them one at a time. However, documents encrypted as Adobe Digital Editions are an exception and can be searched as part of a multiple-document search
Now, select All PDF Documents in and use the Browse for Location drop-down menu and select the location or network you want your search to take place in, and select OK.
After you run a search from the Search window, the results appear in page order, nested under the names of each searched document. Each item listed includes a few words of context (if applicable) and an icon indicating the occurrence type.
Jump to a specific instance in the search results (single PDFs only): Expand the search results. Then select an instance in the results to view it in the PDF. To view other instances, select another instance in the results.
Sort instances in the search results: Select an option from the Sort By menu near the bottom of the Search window. Results can be sorted by Relevance Ranking, Date Modified, Filename, or Location.
By default, the Search window displays basic search options. Select Show More Options near the bottom of the window to display additional options. To restore the basic options, select Show Less Options near the bottom of the window.
Restricts the search to the current PDF, all of a currently open PDF Portfolio (if applicable), an index, or a location on your computer. If you choose to search an index, a location, or a PDF Portfolio, additional options appear under Use These Additional Criteria.
Searches for any instances of at least one of the words typed. For example, if you search for each of, the results include any instances in which one or both of the two words appear: each, of, each of, or of each.
Searches for two or more words that are separated by no more than a specified number of words, as set in the Search preferences. Available only for a search of multiple documents or index definition files, and when Match All Of The Words is selected.
Appears only for searches across multiple PDFs or PDF indexes. You can select multiple property-modifier-value combinations and apply them to searches. This setting does not apply to non-PDF files inside PDF Portfolios.
Use to search for all instances of either term. For example, type email OR e-mail to find all documents with occurrences of either spelling. Searches with OR and no other Boolean operators produce the same results as selecting the Any Of The Words options.
To learn more about Boolean queries, syntax, and other Boolean operators that you can use in your searches, refer to any standard text, website, or other resource with complete Boolean information.
A full-text index is created when someone uses Acrobat to define a catalog of PDFs. You can search that index rather than running a full-text search of each PDF in the catalog. An index search produces a results list with links to the occurrences of the indexed documents.
You can search for files and folders withAdobe Bridge by using multiple combinations of search criteria.You can save search criteria as a smart collection, which isa collection that stays up to date with files that meet your criteria.
Select Include Non-Indexed Files (may be slow) to specify that Adobe Bridge searches uncached and cached files. Searching uncached files (in folders that you have not previously browsed in Adobe Bridge) is slower than searching cached files. (Optional)
To save the search criteria, select the new Smart Collection button in the Collections panel when Adobe Bridge displays your search results. The Smart Collection dialog box automatically includes the criteria of your search. Refine the criteria if desired, and then select Save.
Enter a name for the smart collection in the Collections panel, and then select Enter (Windows) or Return (Mac OS). (Optional)
Learn more on how to Create a smart collection.
Use the Quick Search field in the application bar to find files and folders in Adobe Bridge. Quick Search lets you search using either the Adobe Bridge search engine or Windows Desktop Search (Windows) or Spotlight (Mac OS). The Adobe Bridge engine searches filenames and keywords. Operating system engines look for filenames, folder names, and image keywords. Adobe Bridge search looks within the currently selected folder and all subfolders, including My Computer (Windows) and Computer (Mac OS). Operating system search engines look in the currently selected folder or in My Computer (Windows) and Computer (Mac OS).
Control which files appear in the Content panel by selecting criteria in the Filter panel. The Filter panel displays the number of items in the current set that have a specific value, regardless of whether they are visible. For example, by glancing at the Filter panel, you can quickly see how many files have a specific rating or keyword.
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