On Mar 12, 2010, at 6:31 AM, Bob Friesenhahn wrote:
> On Thu, 11 Mar 2010, Kashif Mumtaz wrote:
>>
>> We are facing an issue while enabling DIRECT_IO for the DB chunks.
>>
>> The error message which appears in the online.log file is "Direct I/O cannot
>> be used for the chunk file "
>>
>> Kind
On Mar 13, 2010, at 4:54 AM, Tonmaus wrote:
> Dear zfs fellows,
>
> during a specific test I have got the impression that scrub may have quite an
> impact on other I/O. CIFS throughput is down to 7 MB/s from 100 MB/s while
> scrub on my main NAS. That is not a surprise as scrub of my raidz2 pool
In addition to backups on tape, I like to backup my ZFS to removable hard
disk. (Created a ZFS filesystem on removable disk, and "zfs send | zfs
receive" onto the removable disk). But since a single hard disk is so prone
to failure, I like to scrub my external disk regularly, just to verify the
d
Thomas Burgess wrote:
I scrub once a week.
I think the general rule is:
once a week for consumer grade drives
once a month for enterprise grade drives.
and before any planned operation which will reduce your
redundancy/resilience, such as swapping out a disk for a new larger one
when growin
I scrub once a week.
I think the general rule is:
once a week for consumer grade drives
once a month for enterprise grade drives.
On Sat, Mar 13, 2010 at 3:29 PM, Tony MacDoodle wrote:
> When would it be necessary to scrub a ZFS filesystem?
> We have many "rpool", "datapool", and a NAS 7130,
When would it be necessary to scrub a ZFS filesystem?
We have many "rpool", "datapool", and a NAS 7130, would you consider to
schedule monthly scrubs at off-peak hours or is it really necessary?
Thanks
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Dear zfs fellows,
during a specific test I have got the impression that scrub may have quite an
impact on other I/O. CIFS throughput is down to 7 MB/s from 100 MB/s while
scrub on my main NAS. That is not a surprise as scrub of my raidz2 pool maxes
out CPU on that machine. (1 Xeon L5410).
I am