zfs discuss - Jan 2008 - b77 v. Solaris 806 zfs create

just installed b77 and having an issue with ''zfs create'':

[root at zfs:~] # time zfs create test/bo
zfs create test/bo  157.21s user 8.21s system 99% cpu 2:46.47 total
[root at zfs:~] #

This happens with each ''zfs create'' On Solaris 806 it returns
right away. Is there some setting in b77 that is causing this or has anyone see
this before?

Thanks.
 
 
This message posted from opensolaris.org

If you have a large pool (# of devices), you are hitting:

6632372 ZFS label writing/checksumming hurts scalability of large configs

Which was introduced in build 77 and is fixed in build 81.  If you have
a small pool, then I''m not sure what it could be.

- Eric

On Fri, Jan 04, 2008 at 04:07:08PM -0800, zfsmonk wrote:
> just installed b77 and having an issue with ''zfs create'':
> 
> [root at zfs:~] # time zfs create test/bo
> zfs create test/bo  157.21s user 8.21s system 99% cpu 2:46.47 total
> [root at zfs:~] #
> 
> This happens with each ''zfs create'' On Solaris 806 it
returns right away. Is there some setting in b77 that is causing this or has
anyone see this before?
> 
> Thanks.
>  
>  
> This message posted from opensolaris.org
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> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
--
Eric Schrock, FishWorks                        http://blogs.sun.com/eschrock

I too am having a similar issue.  It seems to increase as I add more
filesystems.  When i had less than ten it was .3 secs per filesystem.  Now it is

real        5.3
user        4.4
sys         0.5
 
On filesystem 1,040.

This is much slower than in Solaris 10 08/07.  Why is it so slow?  I need 40,000
file systems :-)
 
 
This message posted from opensolaris.org