Re: reiser fs slow on mksf and mount

[Ming Zhang <mingz@ele.uri.edu>]

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On Fri, 2005-08-26 at 21:32 +0400, Vladimir V. Saveliev wrote:
> Hello
> 
> > On Fri, 2005-08-26 at 13:08 -0400, Ming Zhang wrote:
> >>i think 3.2TB partition is not that big these days right?
> >>
> >>i would think some people that hold millions of files will have much
> >>larger partition than this.
> >>
> >>so you think this is a normal speed for such size partition?
> >>
> 
> No. That was joke actually.
> Speed of mkfs.reiserfs confuses me.

:) i captured vmstat 1 and iostat 1. i bet u will be confused more.

it is pretty big for email so i attached them.


> As you did answer about whether all disks were spinning - I suppose that they were.

no


> Can you please run vmstat 1  or iostat 1 while mkreiserfs is running?
> 
> >>also iostat 1 -k shows that during mount, there are small size read
> >>happen each second. so this is because read meta data and metadata is
> >>not continuous on disk?
> >>
> 
> Yes. On mount reiserfs reads all bitmap blocks to memory. Those blocks are spread over whole disk. There is workaround for this problem.
> 
> >>>>
> >>>There is a patch to cure this problem.
> >>>http://www.mail-archive.com/reiserfs-list@namesys.com/msg18442.html
> >>>Please note that it is experimental one.
> >>>
> >>>>

Does reiserfs4 have any improvement on this?

Thanks!

Ming


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