검색

1장. DM-Multipath (Device Mapper Multipathing)

download PDF
Device mapper multipathing (DM Multipath) allows you to configure multiple I/O paths between server nodes and storage arrays into a single device. These I/O paths are physical SAN connections that can include separate cables, switches, and controllers. Multipathing aggregates the I/O paths, creating a new device that consists of the aggregated paths.
This chapter provides a summary of the features of DM-Multipath that were added subsequent to the initial release of Red Hat Enterprise Linux 7. Following that, this chapter provides a high level overview of DM Multipath and its components, as well as an overview of DM-Multipath setup.

1.1. New and Changed Features

This section lists features of the DM Multipath that are new since the initial release of Red Hat Enterprise Linux 7.

1.1.1. New and Changed Features for Red Hat Enterprise Linux 7.1

Red Hat Enterprise Linux 7.1 includes the following documentation and feature updates and changes.
In addition, small technical corrections and clarifications have been made throughout the document.

1.1.2. New and Changed Features for Red Hat Enterprise Linux 7.2

Red Hat Enterprise Linux 7.2 includes the following documentation and feature updates and changes.
  • This document includes a new section, 5.1절. “Automatic Configuration File Generation with Multipath Helper”. The Multipath Helper application gives you options to create multipath configurations with custom aliases, device blacklists, and settings for the characteristics of individual multipath devices.
  • The defaults section of the multipath.conf configuration file supports the new config_dir, new_bindings_in_boot, ignore_new_boot_devs, retrigger_tries, and retrigger_delays parameters. The defaults section of the multipath.conf file is documented in 표 4.1. “멀티패스 설정 기본값 ”.
  • The defaults, devices, and multipaths sections of the multipath.conf configuration file now support the delay_watch_checks and delay_wait_checks configuration parameters. For information on the configuration parameters, see 4장. The DM Multipath Configuration File.
In addition, small technical corrections and clarifications have been made throughout the document.

1.1.3. New and Changed Features for Red Hat Enterprise Linux 7.3

Red Hat Enterprise Linux 7.3 includes the following documentation and feature updates and changes.
  • The multipathd command supports new format commands that show the status of multipath devices and paths in "raw" format versions. In raw format, no headers are printed and the fields are not padded to align the columns with the headers. Instead, the fields print exactly as specified in the format string. For information on the multipathd commands, see 5.11절. “The multipathd Commands”.
  • As of Red Hat Enterprise Linux 7.3, if you specify prio "alua exclusive_pref_bit" in your device configuration, multipath will create a path group that contains only the path with the pref bit set and will give that path group the highest priority. For information on the configuration parameters, see 4장. The DM Multipath Configuration File.
  • The defaults, devices, and multipaths sections of the multipath.conf configuration file now support the skip_kpartx configuration parameter. For information on the configuration parameters, see 4장. The DM Multipath Configuration File.
In addition, small technical corrections and clarifications have been made throughout the document.

1.1.4. New and Changed Features for Red Hat Enterprise Linux 7.4

Red Hat Enterprise Linux 7.4 includes the following documentation and feature updates and changes.
  • The defaults, devices, and multipaths sections of the multipath.conf configuration file support the max_sectors_kb configuration parameter. For information on the configuration parameters, see 4장. The DM Multipath Configuration File.
  • The defaults and devices sections of the multipath.conf configuration file support the detect_path_checker configuration parameter. For information on the configuration parameters, see 4장. The DM Multipath Configuration File.
  • The defaults section of the multipath.conf configuration file supports the remove_retries and detect_path_checker parameters. The defaults section of the multipath.conf file is documented in 표 4.1. “멀티패스 설정 기본값 ”.

1.1.5. New and Changed Features for Red Hat Enterprise Linux 7.5

Red Hat Enterprise Linux 7.5 includes the following documentation and feature updates and changes.
  • As of Red Hat Enterprise Linux 7.5, the blacklist and blacklist_exceptions section of the multipath.conf configuration file support the property parameter. For information on the property parameter, see 4.2.6절. “블랙리스트 예외 설정 ”.
  • the defaults and multipaths sections of the multipath.conf file now support a value of file for the reservation_key parameter. For information on the configuration parameters, see 4장. The DM Multipath Configuration File.
  • The defaults section of the multipath.conf configuration file supports the prkeys_file parameter. The defaults section of the multipath.conf file is documented in 표 4.1. “멀티패스 설정 기본값 ”.

1.1.6. New and Changed Features for Red Hat Enterprise Linux 7.6

Red Hat Enterprise Linux 7.6 includes the following documentation and feature updates and changes.
Red Hat logoGithubRedditYoutubeTwitter

자세한 정보

평가판, 구매 및 판매

커뮤니티

Red Hat 문서 정보

Red Hat을 사용하는 고객은 신뢰할 수 있는 콘텐츠가 포함된 제품과 서비스를 통해 혁신하고 목표를 달성할 수 있습니다.

보다 포괄적 수용을 위한 오픈 소스 용어 교체

Red Hat은 코드, 문서, 웹 속성에서 문제가 있는 언어를 교체하기 위해 최선을 다하고 있습니다. 자세한 내용은 다음을 참조하세요.Red Hat 블로그.

Red Hat 소개

Red Hat은 기업이 핵심 데이터 센터에서 네트워크 에지에 이르기까지 플랫폼과 환경 전반에서 더 쉽게 작업할 수 있도록 강화된 솔루션을 제공합니다.

© 2024 Red Hat, Inc.