stat family function problem (php file_exists)

stat family function problem (php file_exists)

[larith]

Hi

I have one nfs server mounted on 2 clients. If I check on client2 if a file exists, then after creating this file on client2 is is not immediately visible to file_exist() function on client2. it was only after some time. how to fix this ?

client1:/mnt/storage0/test# cat a.php
<?php

if (file_exists ($argv[1])) {
    echo "1\n";
} else {
    echo "0\n";
}


client2:/mnt/storage0/test# php a.php test1
0
client1:/mnt/storage0/test# touch test1

client2:/mnt/storage0/test# php a.php test1
0
client2:/mnt/storage0/test# php a.php test1
0
..........
client2:/mnt/storage0/test# php a.php test1
1


mtab:

xxx:/mnt/drbd0/ /mnt/storage0 nfs rw,hard,timeo=7,intr,addr=xxx 0 0

export

/mnt/drbd0        10.0.0.0/8(rw,async,no_subtree_check,no_root_squash,fsid=100)

Re: stat family function problem (php file_exists)

[Trond Myklebust]

On Thu, 2011-02-24 at 14:56 +0100, larith wrote: 
> Hi
> 
> I have one nfs server mounted on 2 clients. If I check on client2 if a file exists, then after creating this file on client2 is is not immediately visible to file_exist() function on client2. it was only after some time. how to fix this ?

1) Use open() instead of stat()

or

2) Use the -olookupcache=  mount option (see 'man 5 nfs').

Trond

> client1:/mnt/storage0/test# cat a.php
> <?php
> 
> if (file_exists ($argv[1])) {
>     echo "1\n";
> } else {
>     echo "0\n";
> }

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@netapp.com
www.netapp.com