CentOS - Aug 2011 - Are file system mounts costly?

I recall a kernel parameter on Unix System V of number
 of mounted file systems. Max recommended was 8.
 Larger numbers slowed down inode location and
 impacted performance.

Has Linux solved that bottleneck? Are 20 or 30 mounted
 efs and cifs file systems on one system OK? 
-- 
M Reynolds McClatchey Jr        VP Engineering and Inventory
Southern Aluminum Finishing Co Inc      404-355-1560 x222 Voice
1581 Huber St NW                        404-350-0581 Fax
Atlanta GA 30318

On Wednesday 03 August 2011 23:29:48 Reynolds McClatchey
wrote:
> I recall a kernel parameter on Unix System V of number
>  of mounted file systems. Max recommended was 8.
>  Larger numbers slowed down inode location and
>  impacted performance.
> 
> Has Linux solved that bottleneck? Are 20 or 30 mounted
>  efs and cifs file systems on one system OK?
I'm running servers with almost 1500 bind mounts... 
Before that I did check when the server performance is impacted.

So what I found was that when you reach around 20000 mounts all commands start 
to take a long time to execute.

 
Best regards,
Marian Marinov
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