Re: [Moosefs-users] Virtual machine storage

[Krzysztof K. <krz...@mo...>]

Dear WK,

Could you please provide some more details? Which version of MooseFS you were testing? On which Hypervisor? How many chunkserver? How many spindles etc?

You could control the acceptable replication overhead within MooseFS starting from versions before 1.6 but current version 2.0 has a lot of improvements for replication configuration and chunkserver rebalancing in case of failure.

Best Regards,
Krzysztof Kielak
MooseFS - Distributed Filesystem

------
Pozdrawiam,
Krzysztof Kielak

-----Original Message-----
From: WK <wk...@bn...>
Date: Mon, 27 Oct 2014 10:49:17 
To: <moo...@li...>
Subject: Re: [Moosefs-users] Virtual machine storage

We tried it.

Worked great until you had situations where the cluster was ALSO 
replicating and/or was under load.

Then the VMs would start going Read-Only.

We love MooseFS, but for VMs we use DRBD or GlusterFS with simple 
replication.


On 10/23/2014 2:01 PM, Joseph Love wrote:
> Hi,
>
> I’m curious if anyone has used MFS as a virtual machine storage system (specifically, as the storage for a VMware environment).  Last tidbits I read suggested that the latencies were a bit too high to use MFS in this way, and instead to use it as the storage *in* the virtual machines instead.
>
> Some testing with a 3-node cluster and using bonnie++, iozone, & tiobench suggests that write performance for small, random blocks suffer from poor performance and high latencies.  If i’m not mistaken, that should be pretty similar to what VMware disk updates act like, so it seems like it’s possibly a bad idea.  Bigger blocks, and large sequential data access seem to perform great, though.
>
> So, anyone with real-world experience with using MFS in this way?
>
> Thanks,
> -Joe
>
>
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