- A.14 MySQL 5.1 FAQ — MySQL, DRBD, and Heartbeat
- A.14.1 Distributed Replicated Block Device (DRBD)
- A.14.2 Linux Heartbeat
- A.14.3 DRBD Architecture
- A.14.4 DRBD and MySQL Replication
- A.14.5 DRBD and File Systems
- A.14.6 DRBD and LVM
- A.14.7 DRBD and Virtualization
- A.14.8 DRBD and Security
- A.14.9 DRBD and System Requirements
- A.14.10 DBRD and Support and Consulting
In the following section, we provide answers to questions that are most frequently asked about DRBD and LVM.
Questions
23.14.6.1: Can I use DRBD on top of LVM?
23.14.6.2: Can I use LVM on top of DRBD?
23.14.6.3: Can I use DRBD on top of LVM while at the same time running LVM on top of that DRBD?
Questions and Answers
23.14.6.1: Can I use DRBD on top of LVM?
Yes, DRBD supports on-line resizing. If you enlarge your logical volume that acts as a backing device for DRBD, you can enlarge DRBD itself too, and of course your file system if it supports resizing.
23.14.6.2: Can I use LVM on top of DRBD?
Yes, you can use DRBD as a Physical Volume (PV) for LVM.
Depending on the default LVM configuration shipped with your
distribution, you may need to add the
/dev/drbd* device files to the
filter option in your
lvm.conf so LVM scans your DRBDs for PV
signatures.
23.14.6.3: Can I use DRBD on top of LVM while at the same time running LVM on top of that DRBD?
This requires careful tuning of your LVM configuration to avoid duplicate PV scans, but yes, it is possible.
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