oldnfs vs nfs ( Was: Re: Initial NFS Test: Linux vs FreeBSD (769% slower) )

[Marc G. Fournier]

Okay, I think I can make the pitch against Linux based on concerns as to what exactly it is doing to get 'near local drive' performance on start up of jboss … it has to be short circuiting something in favour of speed … and this project (to us) is such that any reduction in risk of data loss is desirable … we have a lot of naysayers against us …

But, that said, the newnfs code does appear to be slower then the oldnfs … just over 60s slower to start up … is that to be expected?


OLDNFS:

JBoss AS 7.1.1.Final "Brontes" started in 246381ms

root at server04:/usr/local/jboss-as-7.1.1.Final # nfsstat -o -c
Client Info:
Rpc Counts:
  Getattr   Setattr    Lookup  Readlink      Read     Write    Create    Remove
   237199         5     17224         0    233935    234240      3743         1
   Rename      Link   Symlink     Mkdir     Rmdir   Readdir  RdirPlus    Access
        0         0         0       307         0        71         0      8420
    Mknod    Fsstat    Fsinfo  PathConf    Commit
        0       467         0         0         0
Rpc Info:
 TimedOut   Invalid X Replies   Retries  Requests
        0         0         0         0    735611
Cache Info:
Attr Hits    Misses Lkup Hits    Misses BioR Hits    Misses BioW Hits    Misses
   712242    237197    527641     17224   -100768    233774     13164    234240
BioRLHits    Misses BioD Hits    Misses DirE Hits    Misses Accs Hits    Misses
        0         0       934        71       467         0    544719      8420


NEWNFS:

JBoss AS 7.1.1.Final "Brontes" started in 305919ms

root at server04:~ # nfsstat -c
Client Info:
Rpc Counts:
  Getattr   Setattr    Lookup  Readlink      Read     Write    Create    Remove
   236644         5     17306         0    230891    231140      3743         1
   Rename      Link   Symlink     Mkdir     Rmdir   Readdir  RdirPlus    Access
        0         0         0       307         0        71         0      8481
    Mknod    Fsstat    Fsinfo  PathConf    Commit
        0       531         0         0         0
Rpc Info:
 TimedOut   Invalid X Replies   Retries  Requests
        0         0         0         0    729116
Cache Info:
Attr Hits    Misses Lkup Hits    Misses BioR Hits    Misses BioW Hits    Misses
   717990    236647    530738     17306   -101086    230812     13164    231140
BioRLHits    Misses BioD Hits    Misses DirE Hits    Misses Accs Hits    Misses
        0         0      1087        55       531         0    548059      8481


Both using same mount options *other then* oldnfs vs nfs …