fragmenter | Fragmentize and rebuild data | Cloud Storage library
kandi X-RAY | fragmenter Summary
kandi X-RAY | fragmenter Summary
Fragmenter is a library for multipart upload support backed by Redis. Fragmenter handles storing multiple parts of a larger binary and rebuilding it back into the original after all parts have been stored.
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Top functions reviewed by kandi - BETA
- Persist a fragment in the cache .
- Executes a block of fragments .
- Store the blob .
- Rebuild the cache .
- Runs the cached data in the cache .
- reads the request body
- Returns the content of this content .
- Returns a padded string
- Returns array of fragments
- Convert object to object key
fragmenter Key Features
fragmenter Examples and Code Snippets
Community Discussions
Trending Discussions on fragmenter
QUESTION
we have a large synonym list. I use a manual analyzer to index the search field. The synonym list is annotated with the "SynonymGraphFilterFactory" filter. So far everything is good. When I do a search on the field, I get the matching result. Synonym list looks like this: car, vehicle
If I enter "car" in my search, the correct results are displayed and the word "car" is highlighted.
When I enter the word "vehicle" I get correct results but nothing is highlighted.
I would like to have both words highlighted in the search. "car" and "vehicle". Is that even possible?
So far I haven't found a suitable solution. Maybe someone can help me here.
Configurations: Hibernate-search 6, Lucene Higlighter 8.7
Code:
...To index the search field, my analyzer looks like this:
ANSWER
Answered 2021-Jan-21 at 09:16I'm not overly familiar with highlighters, but one thing that seems suspicious in your code is the fact that you're using a StandardAnalyzer to highlight. If you want synonyms to be highlighted, I believe you need to use an analyzer that handles synonyms.
Try using the same analyzer for indexing and highlighting.
You can retrieve the analyzer instance from Hibernate Search. See this section of the documentation, or this example:
QUESTION
I am working on indexing a database on SQL SERVER 2016 with Solr Data Import Handler. I am currently working on solr-8.6.3.
I was initially working on windows 10, in standalone mode, I had configured a schema, solrconfig, and core-data-config (for the dih). I uploaded the *jar file that were necessary to make work the dih.
On windows 10, in localhost there was no problem, the connection to the database was established, the data was collected correctly.
But then I wanted to take solr to production and run solr instance on a Linux host (Debian) using putty from my windows computer. I am beginer in linux but I managed to make my server solr work. I put my *jar file (mssql-jdbc-8.4.1.jre14) in the lib folder in order to make work my DIH.
I create my core with this command :
sudo -u solr /opt/solr-8.6.3/bin/solr create -c name_core -d core-data-configs
But when I try to do the full import nothing happen Request:0 Fetched:0 Skipped:0 Processed:0. But I have no error in my log, no "could not load jdbc driver". My log in solr are empty, nothing suspicious or unusual. But clearly solr doesn't reach my sql server.
Here are the schema:
...ANSWER
Answered 2020-Nov-04 at 13:29In case someone encounter the same probleme I solve it by using the debug mode in Solr. To do so, I added to the solr.in.sh file located in /etc/default :
QUESTION
I am having an issue getting Solr Search setup. I am new to Solr, but I believe the issue is with the solrconfig.xml file. But please tell me if I'm wrong!
The issue is that if I type a search in the q field on the Solr admin page, I get 0 results. However, if I type a wildcard query like *"query"* I'm returning all documents in the database. Here is the solrconfig.xml file I have:
ANSWER
Answered 2020-Mar-02 at 20:16For this to work, Solr provides you with some inbuilt token filters. For your case, i think EdgeNGramFilterFactory and NGramFilterFactory will work, as you need partial tokens to be matched without passing a Regex expression. You can find more about this at this link : https://hostedapachesolr.com/support/partial-word-match-solr-edgengramfilterfactory . You can always configure this filter as per your needs . If you are new to filters in Solr, this part of the documentation may help you https://lucene.apache.org/solr/guide/6_6/understanding-analyzers-tokenizers-and-filters.html .
QUESTION
Background: We're in the process of converting our java application from Lucene to Elasticsearch 5.6.6. Using Hibernate 5.2.11 and Hibernate-Search 5.8.2. We have a number of custom Analyzers which get registered with ES (using ElasticsearchAnalysisDefinitionProvider per the documentation) and have imported them as a plugin into the ES server.
For basic querying, using the Query DSL seems fairly straightforward, however there's a highlighting chunk of code that that I've been unable to get working.
Analyzers in ES are a bit more removed than when dealing with Lucene directly and that might be one of my main problems.
Here's the existing method we need to get converted/working; currently getting a NullPointerException within the 3rd line down that calls: ...getAnalyzer(analyzerName), I tracked it to ImmutableSearchFactory::getAnalyzer when it does SearchIntegration integration = integrations.get( LuceneEmbeddedIndexManagerType.INSTANCE )
ANSWER
Answered 2019-Dec-18 at 08:01Is there another way to get the analyzer or something incorrect here?
You cannot get the an instance of org.apache.lucene.analysis.Analyzer if you defined your analyzer for Elasticsearch, because in that case the analyzer only lives on the remote Elasticsearch cluster, and Hibernate Search never uses the analyzer directly: it only pushes the analyzer definition to Elasticsearch and then uses references to that analyzer (the name).
What you are trying to do is to use an analyzer that only exists in another server (the ES server) to run an analysis locally using Lucene. This cannot work.
But more importantly, how do you highlight a fragment when using Hibernate Search over ES?
Hibernate Search itself does not provide highlighting capabilities; only Lucene, the technology that runs traditionally behind Hibernate Search, does. When you use the Elasticsearch integration, you are swapping the Lucene technology for the Elasticsearch technology (more or less). Thus you have to do things differently.
Hibernate Search 6.xHibernate Search 6.0.0.Beta3+ offers a new API that allows you to take advantage of advanced Elasticsearch features more easily. If you want to highlight as part of a search query, there's no need to rely directly on the REST client anymore.
You can use a request transformer to add a highlight element to the HTTP request, then use the jsonHit projection to retrieve the JSON for each hit, which contains a highlight element that includes the highlighted fields and the highlighted fragments.
In Hibernate Search 5.x, you do not have access to the raw JSON of the search request and response, so another approach is necessary.
One option would be for you to continue using Lucene. In order to do that, you will have to define the exact same analyzer, but for Lucene. You can use an analysis definition provider pretty much the same way as with Elasticsearch.
Then you should be able to call getAnalyzer() to retrieve the Lucene analyzer and perform highlighting using Lucene APIs.
There's one caveat, though: if you use the Elasticsearch integration exclusively, Hibernate Search ignores the Lucene analyzers by default. The only way to force Hibernate Search to take the Lucene configuration into account is by putting an @AnalyzerDef annotation on one of your entities and not using it anywhere. You can also define it using programmatic mapping if adding annotations is not an option. It's odd, I know, but it's legacy behavior.
Another option would be for you to send a highlight query to Elasticsearch. However, this will require to access low-level APIs to send a JSON query, and I'm not even sure you can use the ES APIs to perform highlighting on an arbitrary piece of text (only on indexed documents). Some useful information if you want to investigate:
- You will have to retrieve the Elasticsearch client
- Here is the documentation for the REST client you will have to use
- The highlighting API in Elasticsearch 5.6 allows to highlight results when performing a Search query
- The analyzer API in Elasticsearch 5.6 allows to run analysis on an arbitrary string, but doesn't seem to provide highlighting.
QUESTION
Assume I have multiple processes writing large files (20gb+). Each process is writing its own file and assume that the process writes x mb at a time, then does some processing and writes x mb again, etc..
What happens is that this write pattern causes the files to be heavily fragmented, since the files blocks get allocated consecutively on the disk.
Of course it is easy to workaround this issue by using SetEndOfFile to "preallocate" the file when it is opened and then set the correct size before it is closed. But now an application accessing these files remotely, which is able to parse these in-progress files, obviously sees zeroes at the end of the file and takes much longer to parse the file.
I do not have control over the this reading application so I can't optimize it to take zeros at the end into account.
Another dirty fix would be to run defragmentation more often, run Systernal's contig utility or even implement a custom "defragmenter" which would process my files and consolidate their blocks together.
Another more drastic solution would be to implement a minifilter driver which would report a "fake" filesize.
But obviously both solutions listed above are far from optimal. So I would like to know if there is a way to provide a file size hint to the filesystem so it "reserves" the consecutive space on the drive, but still report the right filesize to applications?
Otherwise obviously also writing larger chunks at a time obviously helps with fragmentation, but still does not solve the issue.
EDIT:
Since the usefulness of SetEndOfFile in my case seems to be disputed I made a small test:
ANSWER
Answered 2018-Nov-16 at 20:07Windows file systems maintain two public sizes for file data, which are reported in the FileStandardInformation:
AllocationSize- a file's allocation size in bytes, which is typically a multiple of the sector or cluster size.EndOfFile- a file's absolute end of file position as a byte offset from the start of the file, which must be less than or equal to the allocation size.
Setting an end of file that exceeds the current allocation size implicitly extends the allocation. Setting an allocation size that's less than the current end of file implicitly truncates the end of file.
Starting with Windows Vista, we can manually extend the allocation size without modifying the end of file via SetFileInformationByHandle: FileAllocationInfo. You can use Sysinternals DiskView to verify that this allocates clusters for the file. When the file is closed, the allocation gets truncated to the current end of file.
If you don't mind using the NT API directly, you can also call NtSetInformationFile: FileAllocationInformation. Or even set the allocation size at creation via NtCreateFile.
FYI, there's also an internal ValidDataLength size, which must be less than or equal to the end of file. As a file grows, the clusters on disk are lazily initialized. Reading beyond the valid region returns zeros. Writing beyond the valid region extends it by initializing all clusters up to the write offset with zeros. This is typically where we might observe a performance cost when extending a file with random writes. We can set the FileValidDataLengthInformation to get around this (e.g. SetFileValidData), but it exposes uninitialized disk data and thus requires SeManageVolumePrivilege. An application that utilizes this feature should take care to open the file exclusively and ensure the file is secure in case the application or system crashes.
QUESTION
I need combine query string and terms query that section.text=2525 and section.type_id=3 then requested and got result count 2, but result must be only 1(with id=7). Same section must have text with 2525 and type_id with 3, but it gets topics have section.text with 2525 and section.type_id with 3. Please help. Below has sample:
Create index:
...ANSWER
Answered 2018-Aug-16 at 21:59You can try to use nested mapping and nested query.
Create index with custom mapping first:
QUESTION
QueryScorer queryScorer = new QueryScorer(query, "title");
Fragmenter fragmenter = new SimpleSpanFragmenter(queryScorer);
Highlighter highlighter = new Highlighter(queryScorer); // Set the best scorer fragments
highlighter.setTextFragmenter(fragmenter); // Set fragment to highlight
SearchFactory searchFactory = fullTextEntityManager.getSearchFactory();
IndexReader indexReader = searchFactory.getIndexReaderAccessor().open(SearchResult.class);
indexSearcher = new IndexSearcher(indexReader);
// STEP C
System.out.println("");
ScoreDoc scoreDocs[] = indexSearcher.search(query, 20).scoreDocs;
for (ScoreDoc scoreDoc : scoreDocs) {
Document document = indexSearcher.doc(scoreDoc.doc);
String title = document.get("title");
TokenStream tokenStream = analyzer.tokenStream("title", new StringReader(title));
LOG.info(String.format("TEXTE BRUT: %s", title));
String fragment = highlighter.getBestFragments(tokenStream, title, 3, "...");
LOG.log(Level.INFO, "--------- FRAGMENT search : ", fragment);
ANSWER
Answered 2017-Oct-06 at 14:53You will get such a VerifyError when using a version of the Highlighter not compatible with the expected version of Apache Lucene.
Verify which version of Lucene your app server is using and get a matching version of the Highlighter.
QUESTION
I'm writing an openGL program using the wxWidgets library, I have it mostly working, but I am getting shader compilation errors due to bad characters being inserted (I think), only I can't find where the characters are or what is causing them. The error is :
...ANSWER
Answered 2017-Sep-20 at 15:08The std::string returned by readShaderCode only lives for the duration of the .c_str() call. After that, the std::string implementation is allowed to free the memory, leaving your adapter[0] point to memory that has just been freed (a use-after-free).
You should assign the result of readShaderCode to a local std::string variable such that the memory is only freed at the end of the function. You can then safely store the result of .c_str() into adapter, knowing that the memory has not been freed yet.
QUESTION
Solr 6.4.1 Take very long time to update. I have Solr 6.4.1. About 600 000 documents indexed.
When I do an update it takes about 20 to 60 seconds. Blocking my app (web page) for too long time.
- Solr Logs doesn't show anything like not enough memory or other.
- Search is pretty fast. (I search and index on same machine)
- There is not a lot of search queries (maybe 20 / mins)
- There is ony Postgresql runing on this machine with solr.
My Machine:
...ANSWER
Answered 2017-Mar-13 at 16:26Fortunatly I founded the answer pretty quickly. I can't tell wich one of these parameters is making it fast (I think it is autoCommit) but it is blazing fast actually (I followed some articles on solr optimization).
Here is the new solrconfig.xml:
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