Red Hat Enterprise Linux 7 7.0 Release Notes Release Notes for Red Hat Enterprise Linux 7.0 Last Updated: 2018-05-18 Red Hat Enterprise Linux 7 7.0 Release Notes Release Notes for Red Hat Enterprise Linux 7.0 Red Hat Customer Content Services Legal Notice Copyright © 2014-2017 Red Hat, Inc. This document is licensed by Red Hat under the Creative Commons Attribution-ShareAlike 3.0 Unported License. If you distribute this document, or a modified version of it, you must provide attribution to Red Hat, Inc. and provide a link to the original. If the document is modified, all Red Hat trademarks must be removed. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, OpenShift, Fedora, the Infinity logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. Linux ® is the registered trademark of Linus Torvalds in the United States and other countries. Java ® is a registered trademark of Oracle and/or its affiliates. XFS ® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. MySQL ® is a registered trademark of MySQL AB in the United States, the European Union and other countries. Node.js ® is an official trademark of Joyent. Red Hat Software Collections is not formally related to or endorsed by the official Joyent Node.js open source or commercial project. The OpenStack ® Word Mark and OpenStack logo are either registered trademarks/service marks or trademarks/service marks of the OpenStack Foundation, in the United States and other countries and are used with the OpenStack Foundation's permission. We are not affiliated with, endorsed or sponsored by the OpenStack Foundation, or the OpenStack community. All other trademarks are the property of their respective owners. Abstract The Release Notes documents the major features and enhancements implemented in Red Hat Enterprise Linux 7 and the known issues in this 7.0 release. For detailed information regarding the changes between Red Hat Enterprise Linux 6 and 7, consult the Migration Planning Guide. Acknowledgements Red Hat Global Support Services would like to recognize Sterling Alexander and Michael Everette for their outstanding contributions in testing Red Hat Enterprise Linux 7. Table of Contents Table of Contents .I N. T. R. .O . D. U. .C . T. I.O . N. .5 . .P .A . R. T. .I . N. .E .W . F. E. A. .T .U . R. E. .S . .6 . .C .H . A. P. .T .E .R . .1 .. .A . R. C. .H .I T. .E .C . T. U. R. .E .S . .7 . .C .H . A. P. .T .E .R . .2 .. .I N. .S .T .A . L. L. A. .T .I O. .N . A. .N . D. .B . O. .O . T. I.N .G . .8 . 2.1. INSTALLER 8 2.2. BOOT LOADER 11 .C .H . A. P. .T .E .R . .3 .. .S .T . O. R. .A . G. E. .1 .3 . LIO kernel Target Subsystem 13 LVM Cache 13 Storage Array Management with libStorageMgmt API 13 Support for LSI Syncro 13 LVM Application Programming Interface 13 DIF/DIX Support 13 Support of Parallel NFS 14 .C .H . A. P. .T .E .R . .4 .. .F .I L. E. S. Y. .S .T .E . M. .S . .1 .5 . Support of XFS File System 15 Support of Btrfs File System 15 Fast Block Devices Caching Slower Block Devices 15 .C .H . A. P. .T .E .R . .5 .. .K . E. R. .N .E . L. .1 .6 . Dynamic kernel Patching 16 Support for Large crashkernel Sizes 16 Crashkernel With More Than 1 CPU 16 Swap Memory Compression 16 NUMA-Aware Scheduling and Memory Allocation 16 APIC Virtualization 16 vmcp Built in the Kernel 16 Hardware Error Reporting Mechanism 16 Full DynTick Support 16 Blacklisting kernel Modules 17 dm-era Target 17 C⁠ oncurrent flash MCL updates 17 libhugetlbfs Support for IBM System z 17 AMD Microcode and AMD Opteron Support 17 Available Memory for /proc/meminfo 17 Open vSwitch Kernel Module 18 Intel Ethernet Server Adapter X710/XL710 Support 18 .C .H . A. P. .T .E .R . .6 .. .V .I R. .T .U . A. L. .I Z. A. T. .I O. N. .1 .9 . 6.1. KERNEL-BASED VIRTUALIZATION 19 6.2. XEN 22 6.3. HYPER-V 22 6.4. VMWARE 22 .C .H . A. P. .T .E .R . .7 .. .L .I N. .U .X . .C .O . N. .T .A . I.N .E . R. S. W. .I T. H. D. .O .C . K. .E .R . .F .O . R. M. .A . T. .2 .3 . 7.1. COMPONENTS OF DOCKER CONTAINERS 23 7.2. ADVANTAGES OF USING DOCKER 24 7.3. COMPARISON WITH VIRTUAL MACHINES 24 7.4. USING DOCKER ON RED HAT ENTERPRISE LINUX 7 25 1 7.0 Release Notes .C .H . A. P. .T .E .R . .8 .. .S .Y . S. T. E. .M . .A .N . D. S. E. R. .V .I C. .E .S . .2 .6 . systemd 26 .C .H . A. P. .T .E .R . .9 .. .C . L. U. S. .T .E .R . I.N . G. .2 .7 . ..