From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hans Reiser <reiser@namesys.com>
Subject: Re: External journals and NVRAM devices
Date: Fri, 01 Nov 2002 23:40:07 +0300
Message-ID: <3DC2E6A7.3060801@namesys.com>
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To: Jeremy Howard <jh_lists@fastmail.fm>
Cc: ReiserFS List <reiserfs-list@namesys.com>, mose Jadon <mose@uMEM.COM>, Nikita Danilov <Nikita@Namesys.COM>

Jeremy Howard wrote:

> Hi all,
>
> I'm looking at buying solid state drives / NVRAM drives for our servers
> to hold an external ReiserFS journal.
>
> We are using 2.4.20pre11, and Chris Mason's data logging patches.
>
> I'm looking for any tips on how large the journal is when using
> data=journal, and whether the external log patches are stable and work OK
> in data=journal mode. Is there a command to show the current journal
> size? Does the size vary over time? We need to ensure we buy a card with
> enough memory so this is important information for us.
>
> Is anyone currently using NVRAM for the journal? If so, how do you find
> the performance of this configuration?
>
> TIA,
>   Jeremy
>
>
>
>
You might contact the umem folks.  They are working with us.

Edward, I want those benchmarks produced in a readable form.  Nikita, 
make sure that this happens, and that Edward produces a benchmark with 
an explanation of the significance of what was measured that is 
understandable to persons who aren't him.

-- 
Hans