Re: Multiplexed Log Files
- From: "~Jeff~" <jifjif@xxxxxxxxx>
- To: gheibia@xxxxxxxxx, "Oracle-L@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Sun, 21 Jun 2009 09:39:51 +1200
it does seem to be some kind of feature of hp-ux and sparse files.
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=968235&admit=109447626+1245533390307+28353475
I had just this problem yesterday, trying to get dozens of disks sync'd for
a SAN move and hp-ux tells me they're different sizes!! It wasn't an issue,
of course but gives you a bit of a scare if it's unexpected..
cheers
Jeff
2009/6/21 Amir Gheibi <gheibia@xxxxxxxxx>
> Interesting:
> >>df -b
> /u04 (/dev/vg04/lvol1 ) : 201980744 Kbytes free
> /u03 (/dev/vg03/lvol1 ) : 209052544 Kbytes free
> /u02 (/dev/vg02/lvol1 ) : 205633440 Kbytes free
> /u01 (/dev/vg01/lvol1 ) : 205421832 Kbytes free
> ....
>
> the outcome of df makes more sense. The free space available in /u02 and
> /u03 are close. (almost 3 MB difference. Not sure why?) Why is that
> different from dbf? I don't think I'm misinterpreting dbf's output. any
> idea?
>
>
> On Sat, Jun 20, 2009 at 8:38 PM, tdijkstra <dks88441@xxxxxxxxx> wrote:
>
>> Is it possible to compare df to bdf?
>>
>>
>>
>>
>> On Sat, June 20, 2009 13:25, Amir Gheibi wrote:
>> > Here is what I got from the OS:
>> >>>cd /u02/oradata/LMSUAT
>> > [/u02/oradata/LMSUAT][oracle]
>> >>>ls -l
>> > total 1242384
>> > -rw-r----- 1 oracle oinstall 6930432 Jun 20 19:14 control02.ctl
>> > -rw-r----- 1 oracle oinstall 209716224 Jun 17 12:17 log1.log
>> > -rw-r----- 1 oracle oinstall 209716224 Jun 19 03:00 log2.log
>> > -rw-r----- 1 oracle oinstall 209716224 Jun 20 19:12 log3.log
>> > [/u02/oradata/LMSUAT][oracle]
>> >>>
>> >>>
>> >>>
>> >>>cd /u03/oradata/LMSUAT
>> > [/u03/oradata/LMSUAT][oracle]
>> >>>ls -l
>> > total 1242384
>> > -rw-r----- 1 oracle oinstall 6930432 Jun 20 19:14 control03.ctl
>> > -rw-r----- 1 oracle oinstall 209716224 Jun 17 12:17 log1.log
>> > -rw-r----- 1 oracle oinstall 209716224 Jun 19 03:00 log2.log
>> > -rw-r----- 1 oracle oinstall 209716224 Jun 20 19:14 log3.log
>> > [/u03/oradata/LMSUAT][oracle]
>> >>>
>> >
>> > And still the "bdf" command's output suggests that the /u02 is 3% full
>> and
>> > /u03 is 0% full.
>> >
>> > Could those files under /u03 be sparse files? But then how the
>> > multiplexation of log files mitigate the risk of data loss in case of
>> > media
>> > failure?
>> >
>> > Thanks.
>> > ~ Amir Gheibi
>> >
>> > On Fri, Jun 19, 2009 at 3:09 PM, Mathias Magnusson <
>> > mathias.magnusson@xxxxxxxxx> wrote:
>> >
>> >> Why not also list the size of the files as the DB and as the operating
>> >> system knows it?
>> >> Maybe also a "find /u02" and "find /u3" to verify that all you have
>> >> there
>> >> is logfiles?
>> >>
>> >> Mathias
>> >>
>> >>
>> >> On Fri, Jun 19, 2009 at 8:26 AM, Amir Gheibi <gheibia@xxxxxxxxx>
>> wrote:
>> >>
>> >>> Hi listers,
>> >>> I have a HP-UX box with Oracle 10gR2 installed in it. I created a
>> >>> Database
>> >>> and enabled auto archive. The log files and control files are
>> >>> multiplexed
>> >>> and live in different disks.
>> >>>
>> >>>
>> >>> *>>sqlplus / as sysdba*
>> >>> *
>> >>> *
>> >>> *SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jun 19 14:07:15
>> 2009*
>> >>> *
>> >>> *
>> >>> *Copyright (c) 1982, 2005, Oracle. All rights reserved.*
>> >>> *
>> >>> *
>> >>> *
>> >>> *
>> >>> *Connected to:*
>> >>> *Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit
>> >>> Production*
>> >>> *With the Partitioning, OLAP and Data Mining options*
>> >>> *
>> >>> *
>> >>> *SQL> COLUMN GROUP# FORMAT 9;*
>> >>> *SQL> COLUMN MEMBER FORMAT a30;*
>> >>> *SQL> COLUMN TYPE FORMAT a10;*
>> >>> *SQL> SELECT GROUP#, MEMBER, TYPE, IS_RECOVERY_DEST_FILE FROM
>> >>> V$LOGFILE;*
>> >>> *
>> >>> *
>> >>> *
>> >>> *
>> >>> *GROUP# MEMBER TYPE IS_*
>> >>> *------ ------------------------------ ---------- ---*
>> >>> * 1 /u02/oradata/LMSUAT/log1.log ONLINE NO*
>> >>> * 1 /u03/oradata/LMSUAT/log1.log ONLINE NO*
>> >>> * 2 /u02/oradata/LMSUAT/log2.log ONLINE NO*
>> >>> * 2 /u03/oradata/LMSUAT/log2.log ONLINE NO*
>> >>> * 3 /u02/oradata/LMSUAT/log3.log ONLINE NO*
>> >>> * 3 /u03/oradata/LMSUAT/log3.log ONLINE NO*
>> >>> *
>> >>> *
>> >>> *6 rows selected.*
>> >>> *
>> >>> *
>> >>> *
>> >>> *
>> >>> What I don't understand is the usage of the disk in /u02 and /u03.
>> >>>
>> >>> Here is a partial outcome of the "*bdf*" command:
>> >>>
>> >>> */dev/vg01/lvol1 209682432 4260600 203820416 2% /u01*
>> >>> */dev/vg02/lvol1 209682432 4048992 204027056 2% /u02*
>> >>> */dev/vg03/lvol1 209682432 629888 207419328 0% /u03*
>> >>> */dev/vg04/lvol1 209682432 7513480 200589552 4% /u04*
>> >>> *
>> >>> *
>> >>> /u02 is filled 2% but not /u03.
>> >>> Don't they contain the same copy of the log files?
>> >>>
>> >>> By the way, there is nothing other than those log files in /u02 and
>> >>> /u03.
>> >>>
>> >>> Thanks.
>> >>>
>> >>> ~ Amir Gheibi
>> >>>
>> >>
>> >>
>> >
>>
>>
>>
>
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