検索

このコンテンツは選択した言語では利用できません。

1.6. Cluster Logical Volume Manager

download PDF
The Cluster Logical Volume Manager (CLVM) provides a cluster-wide version of LVM2. CLVM provides the same capabilities as LVM2 on a single node, but makes the volumes available to all nodes in a Red Hat cluster. The logical volumes created with CLVM make logical volumes available to all nodes in a cluster.
The key component in CLVM is clvmd. clvmd is a daemon that provides clustering extensions to the standard LVM2 tool set and allows LVM2 commands to manage shared storage. clvmd runs in each cluster node and distributes LVM metadata updates in a cluster, thereby presenting each cluster node with the same view of the logical volumes (refer to Figure 1.15, “CLVM Overview”). Logical volumes created with CLVM on shared storage are visible to all nodes that have access to the shared storage. CLVM allows a user to configure logical volumes on shared storage by locking access to physical storage while a logical volume is being configured. CLVM uses the lock-management service provided by the cluster infrastructure (refer to Section 1.3, “Cluster Infrastructure”).

Note

Shared storage for use in Red Hat Cluster Suite requires that you be running the cluster logical volume manager daemon (clvmd) or the High Availability Logical Volume Management agents (HA-LVM). If you are not able to use either the clvmd daemon or HA-LVM for operational reasons or because you do not have the correct entitlements, you must not use single-instance LVM on the shared disk as this may result in data corruption. If you have any concerns please contact your Red Hat service representative.

Note

Using CLVM requires minor changes to /etc/lvm/lvm.conf for cluster-wide locking.
CLVM Overview

Figure 1.15. CLVM Overview

You can configure CLVM using the same commands as LVM2, using the LVM graphical user interface (refer to Figure 1.16, “LVM Graphical User Interface”), or using the storage configuration function of the Conga cluster configuration graphical user interface (refer to Figure 1.17, “Conga LVM Graphical User Interface”) . Figure 1.18, “Creating Logical Volumes” shows the basic concept of creating logical volumes from Linux partitions and shows the commands used to create logical volumes.
LVM Graphical User Interface

Figure 1.16. LVM Graphical User Interface

Conga LVM Graphical User Interface

Figure 1.17. Conga LVM Graphical User Interface

Creating Logical Volumes

Figure 1.18. Creating Logical Volumes

Red Hat logoGithubRedditYoutubeTwitter

詳細情報

試用、購入および販売

コミュニティー

Red Hat ドキュメントについて

Red Hat をお使いのお客様が、信頼できるコンテンツが含まれている製品やサービスを活用することで、イノベーションを行い、目標を達成できるようにします。

多様性を受け入れるオープンソースの強化

Red Hat では、コード、ドキュメント、Web プロパティーにおける配慮に欠ける用語の置き換えに取り組んでいます。このような変更は、段階的に実施される予定です。詳細情報: Red Hat ブログ.

会社概要

Red Hat は、企業がコアとなるデータセンターからネットワークエッジに至るまで、各種プラットフォームや環境全体で作業を簡素化できるように、強化されたソリューションを提供しています。

© 2024 Red Hat, Inc.