AIX

AIX

Connect with fellow AIX users and experts to gain knowledge, share insights, and solve problems.


#Power
#Power
 View Only

  • 1.  noac mount option

    Posted Thu April 05, 2012 04:56 AM

    Originally posted by: grukrz1


    Hello

    I have NFS filesystem mounted with noac option:

    noac
    Specifies that the mount command performs no attribute or directory caching. If you do not specify this option, the attributes (including permissions, size, and timestamps) for files and directories are cached to reduce the need to perform over-the-wire NFSPROC_GETATTR Remote Procedure Calls (RPCs). The NFSPROC_GETATTR RPC enables a client to prompt the server for file and directory attributes. The acregmin, acregmax, acdirmin, and acdirmax options control the length of time for which the cached values are retained.
    Why the "find ... -mmin -10" doesn't find a file on the nfs mount just after it was created but with a few seconds delay?
    
# mount -o bg,hard,intr,rsize=4096,wsize=4096,vers=3,proto=tcp,sec=sys,rw,noac nfsserver:/home/test /mnt # touch /mnt/test4;C=0;until [ $C -ge 1 ];

do C=$(find /mnt -type f -mmin -10|wc -l);echo 
"$(date +%S) :: $C :: $(ls -1 /mnt 2>/dev/null)";sleep 1;done 08 ::        0 :: test4 09 ::        0 :: test4 10 ::        0 :: test4 11 ::        0 :: test4 12 ::        0 :: test4 13 ::        0 :: test4 14 ::        1 :: test4 # mount|grep nfs nfsserver /home/test       /mnt             nfs3   Apr 05 07:31 bg,hard,intr,rsize=4096,wsize=4096,vers=3,proto=tcp,sec=sys,rw,noac #

    #AIX-Forum


Related Content