ObjectDB Database Search

the next build an option to disable this zero writing in order to see if it helps. If we disable ... .RandomAccessFile:writeBytes, which takes up to 10 seconds. I've also noticed a large IO write spike at the same ... that can cause large file writes ? I would estimate the size of actual data in the db file

= A + B + 20 | WRITE (B) version=2 value=20 A = A + B + 10 | WRITE (A) version=2 value=10 ...   Thanks. eurojet P. F. Martinez Please explain the test output: Sequential=true Lock= WRITE ... value=0 Thread[Thread-2,5,main] WRITE A1 version=2 value=10 Thread[Thread-3,5,main] READ  A1

: [ObjectDB 2.2.8_01] javax.persistence.PersistenceException Failed to write the value of field property edu ... : Failed to write the value of field property edu.um.fcsit.jpa.entity.Guest.phoneList using enhanced ... Failed to write the value of field field org.dyndns.fzoli.mill.server.model.entity.Player

:25:43 - MASTER instance stopped responding to write requests. All requests sent to the database ... (Unknown Source) The reading continued to work and there was nothing in the server DB logs. All write ... are executed and WRITE requests are rejected. Maybe even the high GC on the slave is the result

and add them to my persistence unit but being able to read and not write is a condition that can't last ... have two(or more) entity managers in my DAO layer and write all changes to both instances(may have IDs synchronization issues), if one of the instances is not available, I'll keep writing to the instance

to write to the parent directory. support Support can you please elaborate what exactly "Try running ObjectDB in a process with no permission to write to the parent directory". I did not undertand ... how to do this. And if write permission permission is blocked for the parent folder, won't ObjectDB locking method

doesn't support JDBC connections and the only way to load data is by using JPA or JDO, i.e. by writing ... with JAXB, so writing lists of entities to xml file should be easy - a generic mechanism to read / unmarshall those files into lists of entities for writing to database may be more ObjectDB / JPA centric

to write the value of field field com.objectdb.test.bug.forum.T501$Store.offers using reflection ... ) Caused by: com.objectdb.error.UserException: Failed to write the value of field field com.objectdb.test ... .type.user.UserMember. write (UserMember.java:544) at com.objectdb.type.user.UserMemberList. write

hi all. i would write a class singleton that encapsulate the entitymanagerFACTORY    ... multiple servlet. but into the class singleton i would write a set of method for the operation ... for update, write . read , create Users it to be syncornized into signature or with the word syncornized

do only few writes (mostly reads), but those writes are important for us - objects rating, profile modifications ... and all writes fails. I was thinking about special version of one master / one slave only cluster ... yet, and therefore, if the slave accepts write operations they may be based on a state, which is not the most up to date

is reading/ writing the files. The tests are showing that the HW RAID5/6 of HDDs deliver comparable ... files, so in fact it means sequential reads/ writes . If it is tested on small files the speed is getting ... ObjectDB read/ write the DB files by large chunks and then it parses it within the RAM (so it would mean

to commit transaction: Failed to write the value of field field image.URI.baURI using reflection (error ... .objectdb.o.UserException: Failed to write the value of field field image.URI.baURI using reflection ... : Failed to write the value of field field image.URI.baURI using reflection at com.objectdb.o.MSG.d(MSG

, in which WRITE requests are served by one master server and READ requests can be served by ... data is divided between nodes. All the servers handle WRITE requests and READ requests of data ... for one server and when there is a need for more than one server to handle WRITE requests. support

down the application will still be able to read from the slaves but writes will not be allowed ... cart because that would require a database write . If the master is down for even an hour ... marker so it decides to write to A. Well there you go .. you have a high probability of database

.entities.instance.ProjectSnapshot smuessemeier Stefan Müssemeier Maybe you are writing to a database ... of the writing . But the writing is ok. Everything is written correctly as far as I can tell. When I ... only one persistence unit and writing without the added ;drop in the connectionURL. Still the error occurs

availability and fault tolerance? Unless the application is read only and no write , as long as ... ; So basically both read and write will always be going to the master and the load ... , not even read load) - Not for Read+ Write failover?   Thank you. Trianglehead Json Error Not

SELECT: TypedQuery query = em.createQuery(     "SELECT p FROM Point p WHERE p.id = " + element.getId(), Point.class); List points = query.getResultList(); WRITE : em.persist(p ... than the write method, in my very simple benchmark. I guess the reason there is no SQL in the write method

] javax.persistence.RollbackException Failed to commit transaction: Failed to write the value of field ... ) Caused by: com.objectdb.o._PersistenceException: Failed to write the value of field test.Squad ... ) ... 1 more Caused by: com.objectdb.o.UserException: Failed to write the value of field test.Squad

.objectdb.o._LockTimeoutException: Write lock cannot be granted for a.b.c.d.EE#150. irrespective if I set ... , Caused by: com.objectdb.o._LockTimeoutException: Write lock cannot be granted for com.x.y.z ... haven't got an easily distributable test for replication, but It shouldn't take too long to write

.   I'm getting this error: Caused by: com.objectdb.o._PersistenceException: Failed to write ... and write on d drive as everything is running on c drive.   Thanks, Eitan eitane Eitan Eibschutz Build 2.3.4_04 should fix the new "Failed to write to file" error. Thank you for the "mvn

.getSelectedValue(),       LockModeType.PESSIMISTIC_ WRITE ); . . } //doEdit ... , LockModeType.PESSIMISTIC_ WRITE );         System.out.println ... ;      em.lock(p, LockModeType.PESSIMISTIC_ WRITE );     

data into the database. What I mean is that we have to write code that is different each time (or write some methods, but still varying input each time), and execute some main method to get blocks ... , MySQL workbench. We can write methods to batch the process, but this becomes annoying if we need

, and you will have to write code for making this schema change. support Support Thanks for your reply. Could you please elaborate more on the nature and complexity of the code that one has to write in the second ... "Could you please elaborate more on the nature and complexity of the code that one has to write in order to develop an application?" support Support

the error 'Failed to write the value of field field TestEmbeddableMap$MyAttributeItem.id using enhanced ... ; Exception in thread "main" [ObjectDB 2.6.4_03] javax.persistence.PersistenceException Failed to write ... .java:40) Caused by: com.objectdb.o.UserException: Failed to write the value of field field

(JpaQuery.java:719) ... 1 more While I wouldn't write the query with different expressions as shown ... ? The error does mean some pain in the neck since it's quite uncomfortable to write these queries by ... will probably work around the issue by writing these queries by hand - although this is not really nice

and compare. If I disable NetBeans compile-on-save (which seems to use the internal compiler to write .sig ... internal ObjectDB system property that you can set (on your web application) in order to write enhanced ... that you can set (on your web application) in order to write enhanced classes  to files: -Dobjectdb.code

overflow during string writing . What are the sizes of strings in that object and what character set is used? Maybe there is a bug in writing specific type of characters. Can you update this specific object ... when writing a HashMap in another PlacementBlockModel. The issue is rather connected to the size

(build 25.131-b11, mixed mode)   Running sample jar: - To generate data ( write ):     java -jar demo-0.0.1-SNAPSHOT.jar write /path/to/file.odb - To read data ( write ):   

cache, ie 10mb worse than 0mb? 2) (separate issue) I'm noticing that write queries are around 20-50x ... operations might be much faster because of using the cache (which is less effective in writing

all the committed updates to the slave. There are solutions that enable full cluster even with the ability to write ... databases on different nodes. support Support Hi I wanted test cluster so I ran 4 threads 2 for writing

in reading but not in writing . You can see this in the JPAB benchmark (compare 1 thread to 5 threads ). ObjectDB is faster than the alternatives also when using multithreading in writing but the gap

Please check the update urls and write them here (copy & paste from png doesn't work). I tried the first ... ) unless you use the Source button and write HTML explicitly. support Support Looking at your graphic, look

has _odbTracker field added) So, instead of DB write a standard serialization mechanizm is triggered. Finnally ... (and stack trace if available).  So, instead of DB write a standard serialization mechanizm

it won't scale enough, furthermore we'll always have a SPOF with odb server due the master- write ... cannot write to the same ObjectDB database concurrently. Future versions may remove this limitation

down to the leaf. The obvious design solution is to write the transactions to the database in sequence.  This is very efficient in that database writes are always appends to the end of the file.  

.    support Support Ok, thanks. I also after several failed attempts, I decided to write ... response but I solved this way, a function that does all the database.  I write the solution

even though there was no writing to the DB, they double in size exactly the amount of the resize value. This means everytime ... have recording set to write only.   bensteele Ben Steele From your description it does seems as

) to make database access for write . Nothing special here I guess: public synchronized void saveCollection ... while database thread is writing new data. I guess that the enhanced code should handle it somehow.  

. The message size going into the queue is not large - around 4k at most. Each read/ write operation ... for each database) and 2 reader threads (1 for each database). Each thread should read or write 10 msgs ... might have actually replicated it now... The attached test (testObjectDbPipe) has 10 threads which write msgs

of your production OS or disk requires special consideration (e.g. if synchronized writing by ObjectDB to the disk returns before the physical writing is completed and the data is still buffered by the OS / disk ... after writing and flushing the transaction updates to the recovery file (the database file

-2.4.4.jar:] at com.objectdb.jpa.criteria.JpqlWriter. write (JpqlWriter.java:94) [objectdb-2.4.4.jar ... :] at com.objectdb.jpa.criteria.JpqlWriter. write (JpqlWriter.java:90) [objectdb-2.4.4.jar:] at com ... .jpa.criteria.JpqlWriter. write (JpqlWriter.java:94) [objectdb-2.4.4.jar:] at com.objectdb.jpa.criteria

into when the limit is hit. What would be a preferred action? Stopping writing to the log? Ignoring the limit and continuing writing to same file? Or maybe just improving the error message to indicate that it is writing to a log archive directory that failed? support Support Agreed

which blew out the logs: Attempt to commit a transaction after failure in writing to database file 'F ... to commit a transaction after failure in writing to database file 'F:\calculationservice\objectdb\dbs ... .objectdb.o.UserException: Attempt to commit a transaction after failure in writing to database file 'F

to the database.  When the client application starts writing , several of the threads throw the above exception but most of the threads are able to do their writes without issue.  CAPdev CAP Dev ... several threads. Please try build 2.4.4_10 that should solve this issue. By the way, writing

message itself doesn't provide much information. Alternatively we can release a new build that will write ... also to change database content, i.e. to write to the database? Build 2.7.5_05 included in addition ... rather than read- write lock in previous builds, when "objectdb.temp.concurrent-file-read" is enabled

( ) piped. write (13) piped.flush() sleep(100) piped.println( ) piped. write (13) piped.flush() sleep(100) piped.println( ) piped. write (13) piped.flush() } }   Now here's the strange bit, the license url

to try now. support Support I would recommend to write a test case for this scenario. We currently ... More details are needed in order to write a test case that can catch such an issue. We already have tests ... for us to reproduce or write tests for. It has happened several times - this is something which should never happen

. The attached test writes data to a db. Then it starts up 2 groups of 10 threads, one group ... performance. If the cache is not used (e.g. in code that only write new objects and never read) caching

after failure in writing to database file 'C:\Users\Home\workspace\Object.Test\test\persistTest.odb ... : Attempt to commit a transaction after failure in writing to database file 'C:\Users\Home\workspace

, and the StateManager approves the change, then the jdoFlags field will be reset to READ_ WRITE _OK. If the parameter