Hello all,

I am pretty new on Berkeley DB but I read the manuals for the
db_recover tool and I am having a problem using it.

When I run db_verify I get
db_verify caTotalRequestedUrls\:1
db_verify: mmap: Resource temporarily unavailable
db_verify: Page 8: non-invalid page 9 on free list
db_verify: DB->verify: caTotalRequestedUrls:1: DB_VERIFY_BAD: Database
verification failed

When I run db_recover I always get

db_recover
db_recover: mmap: Resource temporarily unavailable

in the directory which I run db_recover I have few DB files which only
one has the problem and I
do not have any log file. The log.0000000001 is created after I run the
db_recover.

My question is, does the message indicate that I am missing log files?
Do I need to have the log file(s) in order to run the db_recover tool?
Reading the manual of db_recover and the C api (DB_ENV->open) it is
mandatory to create log files if you want to
recover the db. So, I do need to have the log files ,am I right?

Checking the code(Perl using BerkeleyDB module) of the application,
which creates the DB, I do not see any DB_LOG_DIR statements.

I believe the code must be changed in order to create log files.

what do you think?

Cheers,
Pavlos

If I do not have the log files

Is your underlying filesystem a remotely mounted filesystem (for
example, NFS). I would check to make absolutely sure that you're
running on a local filesystem, and not an NFS-mounted one.

You will only get log files if you have configured your environment for
transactions. See:
http://www.sleepycat.com/docs/api_c/env_list.html looking for the
DB_INIT_TXN flag.



Ron

Hi,
So let me see if I get it right.
In order to have logs and be able to recover a DB you need to enable
DB_INIT_LOG
DB_INIT_TXN

and configure the log path as well.

am I right?

Cheers,
Pavlos

"pavlos.parissis (AT) gmail (DOT) com" <pavlos.parissis (AT) gmail (DOT) com> wrote:

Are you running your test on HP/UX? HP/UX has a problem with mmap-ping
the same region into memory more than once.


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