Re: External journals and NVRAM devices

[Hans Reiser]

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