Oracle Enterprise Linux

Available as open source, Oracle Enterprise Linux is fully compatible—both source and binary—with Red Hat Enterprise Linux. An independent, third-party white paper from the Edison Group, Oracle Unbreakable Linux: True Enterprise-Quality Linux Support includes laboratory test results which further demonstrate this true compatibility. Oracle Enterprise Linux is certified for compliance with the Linux Standard Base (LSB) standard, which reduces the differences between individual Linux distributions and greatly reduces the costs involved with porting applications to different distributions, as well as lowers the cost and effort involved in after-market support of those applications.

Learn more about certified hardware and supported releases. Partners testing and certifying their applications on Oracle Enterprise Linux will, at most, simply install their application on Oracle Enterprise Linux and verify the information described in these data sheets:

• Data sheet: Certification with Oracle Enterprise Linux 4 (PDF)
• Data sheet: Certification with Oracle Enterprise Linux 5 (PDF)

The following tables include further details on Oracle Enterprise Linux features and some of the many key contributions Oracle shares with the Linux community. For additional information, visit oss.oracle.com.

Specifications	Oracle Enterprise Linux 4	Oracle Enterprise Linux 5
Architectures	X86, X86-64, Itanium *	X86, X86-64, Itanium **
Versions	Update 4, Update 5, Update 6, Update 7, Update 8	General Availability (Release 1), Update 1, Update 2, Update 3, Update 4
Minimum Memory Requirements	256MB X86, X86-64 512MB IA64	512MB
Minimum Disk Space	800MB	1GB
Max Memory	64GB x86 1TB Intel64 256GB AMD64	16 GB x86 1TB Intel64 256GB AMD64
Max Number of CPUs	Unlimited	Unlimited
Kernel Base Version	2.6.9	2.6.18
Compiler	Gcc 3.4	Gcc 4.1
Libraries	Glibc 2.3.4	Glibc 2.5
Cluster Administration	OCFS2 available, GFS and Cluster Suite not in base OS	OCFS2 available, GFS and Cluster Suite included in base OS
Supported Filesystems
Ext3 Max File Size	2TB	2TB
Ext3 Max filesystem size	8TB	8TB/16TB (in 5.1)
OCFS2 Max File Size	16TB	16TB
OCFS2 Max filesystem size	16TB	16TB
GFS Max File Size	N/A	16TB/8EB
GFS Max filesystem size	N/A	16TB/8EB
Oracle Value-Added Technology
ASMLib ASMLib is a support library for the Automatic Storage Management feature of Oracle Database 10g which simplifies database administration. More Information
OCFS2 v.1.4 Oracle Cluster File System 2 (OCFS2) is an open source, general-purpose, extent-based clustered filesystem which Oracle developed and contributed to the Linux community, and accepted into Linux kernel 2.6.16. More Information
OFED / RDS The Open Fabric Enterprise Distribution (OFED) aims to deliver a unified, cross-platform, transport-independent software stack for RDMA, including a range of standard protocols such as Reliable Datagram Sockets (RDS). Oracle provides updated versions of the OFED rpms on top of the versions included in the base OS image. More Information
Oracle Clusterware for Unbreakable Linux Cluster management software is integral to clustering, and Oracle Clusterware, cluster management software previously available only with Oracle Real Application Clusters (Oracle RAC), is now available under a separate license to Unbreakable Linux support customers at the basic and premier levels at no additional cost. More Information
Oracle IC Oracle Instant Client (IC) allows you to run your applications without installing the standard Oracle client or having an ORACLE_HOME. OCI, OCCI, Pro*C, ODBC, and JDBC applications work without modification, while using significantly less disk space than before. More Information
Oracle Linux Test (OLT) Kit The Oracle Linux Test (OLT) Kit is a test framework designed to verify Linux kernel functionality and stability essential for the Oracle Database both in single node and in RAC configurations. OLT includes stress and destructive tests for network and storage failures. More Information
Oracle Management Pack for Linux Available exclusively for Oracle Unbreakable Linux Basic and Premier support customers, the Oracle Management Pack for Linux provides an integrated and cost-effective solution for complete Linux server lifecycle management. More Information
Oracle Validated Configurations Oracle Validated Configurations are pre-tested, validated architectures with software, hardware, storage, and networking components with included documented best practices for deployment. More Information
PHP OCI8 driver Oracle Call Interface (OCI8) database driver for PHP provides new, improved integration between PHP and Oracle Database 11g, to allow a server-side connection pool shareable across web servers and languages, significantly enhancing the scalability of web-based systems. More Information
Unbreakable Linux Network (ULN) ULN is a comprehensive resource for Oracle Unbreakable Linux support subscribers, and offers access to Linux software patches, updates and fixes, along with information on up2date program and support policies. More Information
YAST Yet Another Setup Tool (YAST) helps make system administration easier by providing a single utility for configuring and maintaining Linux systems. YAST is used as part of Oracle Enterprise Manager for Linux Host Server Management. More Information
Yum The Oracle public yum server offers a free and convenient way to install packages from the Enterprise Linux and Oracle VM installation media via a yum client. Note that errata are not available via this public yum server; to access errata you must have a valid support contract to access ULN. Also note that this yum server is offered without support. More Information
Third-Party Validations
LSB Certification The Linux Standard Base (LSB) reduces the differences between individual Linux distributions and greatly reduces the costs involved with porting applications to different distributions, as well as lowers the cost and effort involved in after-market support of those applications. More Information
EAL4+ Security Evaluation The Evaluation Assurance Level of an IT product or system is a numerical grade assigned following the completion of a Common Criteria security evaluation, an international standard backed by a U.S. Government initiative of the National Institute of Standards and Technology (NIST) and the National Security Agency (NSA). More Information

* For the Itanium architecture, Oracle provides rpms for download from ULN starting with OEL4U6. Oracle provides ISOs for free download from Oracle E-Delivery starting with OEL4U8.
** For the Itanium architecture, starting with OEL5 Update 4, ISOs are available on Oracle E-Delivery and rpms are available on ULN