On 26-Apr-07, at 11:57 AM, cedric briner wrote:
okay let'say that it is not. :)
Imagine that I setup a box:
- with Solaris
- with many HDs (directly attached).
- use ZFS as the FS
- export the Data with NFS
- on an UPS.
Then after reading the :
http://www.solarisinternals.com/wiki/index.php/
ZFS_Best_Practices_Guide#ZFS_and_Complex_Storage_Considerations
I wonder if there is a way to tell the OS to ignore the fsync flush
commands since they are likely to survive a power outage.
Cedric,
You do not want to ignore syncs from ZFS if your harddisk is directly
attached to the server. As the document mentioned, that is really
for
Complex Storage with NVRAM where flush is not necessary.
This post follows : `XServe Raid & Complex Storage Considerations'
http://www.opensolaris.org/jive/thread.jspa?threadID=29276&tstart=0
Where we have made the assumption (*1) if the XServe Raid is
connected to an UPS that we can consider the RAM in the XServe Raid
as it was NVRAM.
May not be relevant, but ISTR that the Xserve has an option for
battery-backed write cache RAM also.
--Toby
...
Ced.
--
Cedric BRINER
Geneva - Switzerland
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