Re: journaling filesystem

Jakub Jelinek (
Fri, 15 May 1998 08:46:26 +0200 (MET DST)

> There is hardware option for Sun's named Prestoserve. It's probably named
> something else nowadays but whatever, this is NVRAM used as backing store
> just for NFS writes plus drivers which mainly deal with with crash
> recovery. This things allows NFS write numbers to come significantly closer
> to write performance on local disks. But then this usage of NVRAM is
> completly different from filesystem logs, but can be combined.

I have now 4MB of SUNW,nvtwo NVRAM in SS1000 and 2MB of SUNW,nvone in SS20,
both running Linux. I hope to write a driver soon and then we could do
metadata logging onto those NVRAMs. BTW: Aren't there any similar NVRAM
cards or SIMMs for PCs these days, so that it could be a more general
solution than for one single port?

Jakub Jelinek | |
Administrator of SunSITE Czech Republic, MFF, Charles University
Ultralinux - first 64bit OS to take full power of the UltraSparc
Linux version 2.1.101 on a sparc64 machine (498.80 BogoMips).

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