Red Hat Enterprise Linux 7 7.0 Release Notes
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Red Hat Enterprise Linux 7 7.0 Release Notes Release Notes for Red Hat Enterprise Linux 7 Red Hat Customer Content Services Red Hat Enterprise Linux 7 7.0 Release Notes Release Notes for Red Hat Enterprise Linux 7 Red Hat Customer Content Services Legal Notice Copyright © 2014 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, MetaMatrix, 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. T able of Cont ent s 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. Bo o t Lo ad er 11 .C .h .a .p . t.e .r . 3. .. S. t. o. r.a .g . e. 1. 3. LIO kernel Targ et Sub system 13 LVM Cache 13 Sto rag e Array Manag ement with lib Sto rag eMg mt API 13 Sup p o rt fo r LSI Syncro 13 LVM Ap p licatio n Pro g ramming Interface 13 DIF/DIX Sup p o rt 13 Sup p o rt o f Parallel NFS 14 .C .h .a .p . t.e .r . 4. .. F. i.l e. .S .y .s .t .e .m . s. 1. 5. Sup p o rt o f XFS File System 15 Sup p o rt o f Btrfs File System 15 Fast Blo ck Devices Caching Slo wer Blo ck Devices 15 .C .h .a .p . t.e .r . 5. .. K. e. r.n . e. l. 1. 6. Dynamic kernel Patching 16 Sup p o rt fo r Larg e crashkernel Sizes 16 Crashkernel With Mo re Than 1 CPU 16 Swap Memo ry Co mp ressio n 16 NUMA-Aware Sched uling and Memo ry Allo catio n 16 APIC Virtualizatio n 16 vmcp Built in the Kernel 16 Hard ware Erro r Rep o rting Mechanism 16 Full DynTick Sup p o rt 17 Blacklisting kernel Mo d ules 17 d m-era Targ et 17 Co ncurrent flash MCL up d ates 17 lib hug etlb fs Sup p o rt fo r IBM System z 17 AMD Micro co d e and AMD Op tero n Sup p o rt 17 Availab le Memo ry fo r /p ro c/meminfo 18 Op en vSwitch Kernel Mo d ule 18 Intel Ethernet Server Ad ap ter X710 /XL710 Sup p o rt 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 Virtualizatio n 19 6 .2. Xen 23 6 .3. Hyp er-V 23 6 .4. VMware 23 .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. 4. 7.1. Co mp o nents o f Do cker Co ntainers 24 7.2. Ad vantag es o f Using Do cker 25 7.3. Co mp ariso n with Virtual Machines 25 7.4. Using Do cker o n Red Hat Enterp rise Linux 7 26 1 Red Hat Ent erprise Linux 7 7 .0 Release Not es .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. 7. systemd 27 .C .h .a .p . t.e .r . 9. .. C. l.u . s. t.e .r .i n. g. ..