[Lustre-discuss] Lustre and loop devices

[Kevin Van Maren]

See https://bugzilla.lustre.org/show_bug.cgi?id=22004

The work-around is to patch the loopback driver (loop.c) on the client node.

Kevin


Sergey Arlashin wrote:
> Hi!
> Here  
> http://blogs.sun.com/atulvid/entry/improving_performance_of_small_files 
> is described a very interesting way to improve the performance of 
> small files on a Lustre storage - to mount a loopback file, which is 
> actually placed on the storage with LustreFS. I checked - it really 
> worked. It greatly improved the speed. But in the end of the doc there 
> is a notice:
> "Under heavy memory loads, Lustre sometime drops pages of IO going to 
> loopback mounted files. This is a known issue is being worked on."
> What does it actually mean? And how it can affect my data on the storage?
> And does anybody actually use this method? Is there any way to use it 
> safely?
>
>
> -----
> WBR, Sergey Arlashin
> ------------------------------------------------------------------------
>
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