Database-resident JVM What, Where, How is it use and his potential
Database-resident JVM - What, Where, How is it use and his potential
May 22, 2015
Oracle OpenWorld San Pablo 2012
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Database-resident JVMWhat, Where, How is it use and his potential
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Agenda
– Database resident JVM
– Session Management
– Memory Management
– Security
– Oracle Commitment to Java in the Database
– What we heard at OOW San Francisco about 12c
– Case Study● Near Real Time Full Text Indexing● Analytic Tool for Enterprise Server Logs
Database resident JVM
● Available since Oracle 8i● Architecture● Robustness● Class sharing● Memory Management● Scalability● Performance
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Oracle JVM versus Sun’s JDK
Sun’s JDK VM● Thread Based
● Sharing across Threads
● Limited Scalability
● Classes in file system
● Resolve classes with “Classpath”
● JIT
● Preemptive multi-threading
● Limited Robustness (process failure)
OracleJVM● Database Session Model
● Session Isolation● Unlimited Scalability● Classes in database● Resolve classes with
“Resolver Spec”● JIT (11g and up)● Non-Preemptive multi-
threading● Does not crash as a whole
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Database Sessions Imposed on Java
Within the context of a session, the client performs the following:
1)Connects to the database and opens a session.
● Runs Java within the database. This is referred to as a call
● Continues to work within the session, performing as many calls as required
● Ends the session
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Oracle JVM Class Sharing
…
Shared JVM System Classes
Shared User Application Classes
Oracle Database
Virtual JVMInstance
Virtual JVM Instance
Session
System Statics
User Statics
Session
System Statics
User Statics
Session
System Statics
User Statics
…
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Oracle JVM Memory Areas
● Java PoolUsed by the Java class loader to allocates space for bytecodes and other read-only class metadata; also Java states that are migrated from the Session space at the end of call.
● Session SpaceUsed for preserving the state of system objects, user objects, and metadata used by the Java runtime; also used for end of call migration
● New SpaceDefault memory area for allocating almost all Java objects, except large objects
● Old SpaceUsed for holding long-lived or large objects (i.e., larger than 1-K Bytes) for the duration of a call.
● Run SpaceUsed for holding system objects (e.g., classloader objects) allocated for the duration of a call.
● Stack SpaceUsed to allocate system objects used by the interpreter
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OracleJVM Security
Strong Security combining database security mechanisms with Java security mechanisms● User authentication● Database-schema security ● Login-user and effective-user security● Class resolution security● Java 2 security
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Oracle’s Commitment to OJVM
● Used by a significant percentage of database customers● Used by Oracle Components
– InterMedia– Spatial– Text– XQuery (XMLDB)– WareHouse Builder– CDC (Change Data Capture)– ORE (Oracle R Enterprise – database resident)– ODM (Oracle Data Mining analytics functions)
● 12c Enhancements
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● Many among Fortune 500 companies● Some examples from
“Java in the Oracle Database @ Work – Customer Case Studies”
● And for sure Scotas & Cima
Who is Using OJVM
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Java in the Database: What For
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● Trigger-based Notification System using RMI
● Secure Credit-Card Processing using JSSE
● Custom Alert applications that monitor business data
● Sending emails with attachment from within the database
● Produce PDF files from Result Set● Execute external OS commands and
external procedures● Implement Md5 CRC● Publish Repository Content to Portal● Portable Logistic Applications
● Implement Parsers for various File Formats (txt, zip, xml, binary)
● Implement Image Transformation and Format Conversion (GIF, PNG, JPEG, etc)
● Implement database-resident Content Management System
● HTTP Call-Out● JDBC Call-Out● RMI Call-Out to SAP● Web Services Call-Out● Messaging across Tiers● RESTful Database Web Services● Near Real Time Full Text Search
According to OOW SF presentation
● JDK interchangeable at any time (Perl script)● Support for latest JDK
– 1.6 default– 1.7
● JNDI support● Logging support● In-database Hadoop (Map-Reduce)● Security enhancements● Fast switch from SQL-OJVM calls
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Case Study
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Database resident JVM Client Example
Scotas Near Real Time Full Text Searching
Scotas OLS
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● An Embedded version of Solr Framework running inside Oracle OracleJVM● 42 new Java Classes and several new PLSQL Object Types● Two new domain index for Oracle Databases using Data Cartridge API (ODCI)● A new Store implementation for Lucene (OJVMDirectory) which replaces a traditional filesystem by Secure BLOB
● Four new SQL operators scontains(), sscore(), smlt(), shighlight() and poweful text analysis functionalities
● An orthogonal/up-to-date Solr solution for any programming language, especially Java, Ruby, Python, PHP and .Net, currently latest production version – 4.0.0.
● Available to any Oracle product such as BI, Apex, ODM
create index esl_events_sidx on esl_events(message) indextype is Lucene.SolrIndexparameters('SyncMode:Deferred;MltColumn:text;HighlightColumn:title;DefaultColumn:text;CommitOnSync:true;ExtraTabs:ESL.esl_causes c;WhereCondition:L$MT.event_id=c.event_id(+);ExtraCols:.....') local parallel 2;
select /*+ DOMAIN_INDEX_SORT */ sscore(1),shighlight(1),message from esl_events where scontains(message,'severity_s:(ERROR INFO) AND springframework',1)>0 and gen_day between 26 and 27;
Oracle Integrated Information Architecture Capabilities - Scotas OLS Integration
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Man
agem
ent,
Sec
urity
, G
over
nanc
e
AcquireData
Un
stru
ctu
red
S
emi-
str
uc
ture
d
S
tru
ctu
red
Machine Generated
Social Media
Text, Image, Video, Audio
Transactions
Master & Reference
Organize Analyze Decide
Reporting & Dashboards
Alerting
EPM - BI Applications
Advanced Analytics
Visual Discovery
Big DataCluster
Specialized Hardware
High SpeedNetwork
RDBMSCluster
In MemoryAnalytics
ETL/ELT
ChangeDC
Real-Time
Message- Based
HadoopMapReduce
In-DatabaseAnalytics
Source: Oracle Information Architecture: An Architect’s Guide to Big DataAn Oracle White Paper in Enterprise Architecture, March 2012Figure 3: Oracle Integrated Information Architecture Capabilities
DBMS(OLTP)
NoSQL
ODS
HDFS
Warehouse
StreamingCEP Engine
Files
Scotas Search
• Product comparison
SCOTAS OLS
Oracle Text
Solr Lucene
Real Time
Scalability
Performance
Security
Integration
Flexible and Powerful features
Bringing the best of both worlds
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Thank You!
www.scotas.com | [email protected] | +1 (650) 704-7915 | 440 North Wolfe Road, Sunnyvale, CA 94085
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