From mboxrd@z Thu Jan 1 00:00:00 1970 From: Edward Shishkin Subject: Re: External journals and NVRAM devices Date: Sat, 02 Nov 2002 00:45:20 +0300 Sender: edward Message-ID: <3DC2F5F0.2D459C66@namesys.com> References: <3DC21358.5040808@fastmail.fm> <3DC2E6A7.3060801@namesys.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com List-Id: Content-Type: text/plain; charset="us-ascii" To: Hans Reiser Cc: Jeremy Howard , ReiserFS List , mose Jadon , Nikita Danilov Hans Reiser wrote: > > 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. Ok, I'll try to make something on next week. Edward. > > -- > Hans