There will be some slight lvm overhead, depending on your configuration, but in my experience it will be negligible. I would suggest avoiding creating *any* snapshots when using LVM though as that will decrease performance pretty quickly.
For kafka it is unlikely you will want to create any snapshots of your datastores - so you will probably OK. In my environment we use an HBA with a baterybacked cache, then create RAID-10 volumes in hardware. Then we overlay XFS on top of that volume. This seems to be a pretty optimal configuration in our environment as we can obtain greater IOPS from a RAID-10 volume as opposed to what you would get in a single disk (and the battery helps reduce the likelihood of data corruption in a power failure event). LVM will give you bit better perf in theory as well (assuming you create a stripe of disks) although there will be greater overhead managing the stripe in software as opposed to hardware. Hope this helps! -pete On 02/11/16 07:24, yazgoo wrote: > Hi everyone, > > I have multiple disks on my broker. > Do you know if there's a noticeable overhead using LVM versus multiple > log.dirs ? > > Thanks > -- Pete Wright Lead Systems Architect Rubicon Project pwri...@rubiconproject.com 310.309.9298
