Re: async vs. sync

["jehan.procaccia" <jehan.procaccia@int-evry.fr>]

Trond Myklebust wrote:

>m=E5 den 22.11.2004 Klokka 18:55 (+0100) skreiv jehan.procaccia:
>
> =20
>
>>My users won't accept the sync performances !
>>   =20
>>
>
>Will they accept data loss in case of a server crash? If they don't
>care, then hey - you're safe...
> =20
>
in my old solaris 7 nfs it was async I suppose ! although we didn't lose=20
data, maybe we where risking it ... ? anyway now I move from and old=20
solaris NFS server to a brand new linux one with a SAN (AX100) Storage=20
Processor in Raid 5 an Fiber Channel attachement, how can I support=20
performances more than 50 times longer :-( with that config,  user and=20
manager wil tell me that I  spoild money on that new server !, there=20
must be a misconfiguration somewhere ?.

>BTW: I've never seen a slowdown as bad as that. Just out of curiosity,
>what happens if you turn off ACL support and/or use a client from
>ftp.kernel.org, with no ACL support.
> =20
>
I did it on the server export option (no_acl) , no better performance.=20
However I don't know why I have ACLs,  I nerver ask for it !?
/etc/fstab on the server
/dev/emcpowerp1         /p2v5f1         ext3   =20
defaults,usrquota,grpquota     1 2

>(NOTE: the reason I've rejected ACLs so far in the mainline client is
>the lack of support for caching in the patches I've seen so far)
>
>Cheers,
>  Trond
> =20
>



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