kern/131360: [nfs] poor scaling behavior of the NFS server under load

Martin Birgmeier martin at email.aon.at
Sat Feb 7 09:00:17 PST 2009


The following reply was made to PR kern/131360; it has been noted by GNATS.

From: Martin Birgmeier <martin at email.aon.at>
To: bug-followup at FreeBSD.org
Cc:  
Subject: Re: kern/131360: [nfs] poor scaling behavior of the NFS server under load
Date: Sat, 7 Feb 2009 17:59:05 +0100 (CET)

 o.k. more info... I have this on the server (machine A in my previous post);
 it is showing quite a high number for "Server Ret-Failed":
 
 # nfsstat
 Client Info:
 Rpc Counts:
   Getattr   Setattr    Lookup  Readlink      Read     Write    Create    Remove
   2304000         0       221       165         0         0         0         0
    Rename      Link   Symlink     Mkdir     Rmdir   Readdir  RdirPlus    Access
         0         0         0         0         0        22         0         0
     Mknod    Fsstat    Fsinfo  PathConf    Commit
         0        58         0         0         0
 Rpc Info:
  TimedOut   Invalid X Replies   Retries  Requests
         0         0        17        17   2304466
 Cache Info:
 Attr Hits    Misses Lkup Hits    Misses BioR Hits    Misses BioW Hits    Misses
         0   2304000    885499       221         0         0         0         0
 BioRLHits    Misses BioD Hits    Misses DirE Hits    Misses
    532202       165        89        11        50         0
 
 Server Info:
   Getattr   Setattr    Lookup  Readlink      Read     Write    Create    Remove
         8        19   3123468        82     34382      3156        19        11
    Rename      Link   Symlink     Mkdir     Rmdir   Readdir  RdirPlus    Access
         0         0        11         0         0      9522         0    868616
     Mknod    Fsstat    Fsinfo  PathConf    Commit
         0     31396        23         0       147
 Server Ret-Failed
           3046139
 Server Faults
             0
 Server Cache Stats:
    Inprog      Idem  Non-idem    Misses
         0        51         0       412
 Server Write Gathering:
  WriteOps  WriteRPC   Opsaved
      3156      3156         0
 
 
 and this on the client (machine B):
 
 # nfsstat
 Client Info:
 Rpc Counts:
   Getattr   Setattr    Lookup  Readlink      Read     Write    Create    Remove
  48679649         0   3035823        58     26400         0         0         0
    Rename      Link   Symlink     Mkdir     Rmdir   Readdir  RdirPlus    Access
         0         0         0         0         0      7255         0    767940
     Mknod    Fsstat    Fsinfo  PathConf    Commit
         0     27347         1         0         0
 Rpc Info:
  TimedOut   Invalid X Replies   Retries  Requests
         0         0         0         1  52543821
 Cache Info:
 Attr Hits    Misses Lkup Hits    Misses BioR Hits    Misses BioW Hits    Misses
  46870061  49414909  64135869   3035823   1144711     26389         0         0
 BioRLHits    Misses BioD Hits    Misses DirE Hits    Misses
   8748412        58     43987      7218     25358         0
 
 Server Info:
   Getattr   Setattr    Lookup  Readlink      Read     Write    Create    Remove
         0         0         0         0         0         0         0         0
    Rename      Link   Symlink     Mkdir     Rmdir   Readdir  RdirPlus    Access
         0         0         0         0         0         0         0         0
     Mknod    Fsstat    Fsinfo  PathConf    Commit
         0         0         0         0         0
 Server Ret-Failed
                 0
 Server Faults
             0
 Server Cache Stats:
    Inprog      Idem  Non-idem    Misses
         0         0         0         0
 Server Write Gathering:
  WriteOps  WriteRPC   Opsaved
         0         0         0
 


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