Markus,
Let me correct/expand this:
1. If you create a RAIDZ pool on OS 11 Express (b151a), you will have
some mirrored metadata. This feature integrated into b148 and the pool
version is 29. This is the part I mixed up.
2. If you have an existing RAIDZ pool and upgrade to b151a, you would
need to upgrade the pool version to use this feature. In this case,
newly written metadata would be mirrored.
Thanks,
Cindy
On 11/18/10 10:15, Cindy Swearingen wrote:
Hi Markus,
Jeff Bonwick integrated this feature so I'll let him describe it.
In a nutshell:
If you create a RAIDZ pool in OS 11 Express or if you are running at
least build 129, some of the pool metadata is mirrored automatically.
This is a performance feature that should increase read I/O performance,
by decreasing IOPS. This feature should improve directory searches,
for example.
Some mirrored metadata in a RAIDZ pool in b129 is done automatically,
but it doesn't provide any additional redundancy. Redundancy is still
determined by your RAIDZ configuration (raidz1, raidz2, or raidz3).
This is a performance enhancement only.
No property exists to disable or enable it.
Its automatic, for your data lookups...
Cindy
On 11/18/10 03:13, Markus Kovero wrote:
Hi, I’m referring to;
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6977913
It should be in Solaris 11 Express, has anyone tried this? How this is
supposed to work? Any documentation available?
Yours
Markus Kovero
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