Re: [Moosefs-users] Virtual machine storage

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

Hi,




Actually we are currently testing MooseFS with VMWare. In our test environment we have created a large file, that was presented to ESXi as an iSCSI target, formated with VMFS. 


Our first observations led to performance improvements in MooseFS for small block random I/O operations on a large files - typical case for VM images.


We’ll try to publish some results soon.


Best Regards,
Krzysztof Kielak


MooseFS - Distributed Filesystem

Director of Operations and Customer Support
Mobile: +48 601 476 440





Od: Joseph Love
Wysłano: ‎czwartek‎, ‎23‎ ‎października‎ ‎2014 ‎23‎:‎01
Do: moo...@li...





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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