Hello all,
I'm trying to create a mirrored failover server with data from our live
Koha. In order to do so, I'm using *mysqldump* and *mysql* for backup
and restore.
I've discovered a troubling problem and I can't determine the cause.
I run this command to backup the live server:
*mysqldump --single-transaction -ukoha -p koha >
/home/koha/KohaServerBackups/koha.`/bin/date +\%Y\%m\%d\%H\%M\%S`.sql*
This seems to work correctly (and very quickly! 1.7 GB database exports
in 2 min)
Then, I run this command:
*mysql -v -ukoha -p koha < /home/koha/KohaServerBackups/backupFileName.sql*
This also seems to work, as I receive no warnings or error messages.
I'm exporting from a 3.00.05.001 system and importing to a 3.00.05.003
system, so I then run the
*$KOHA_SOURCE/installer/data/mysql/updatedatabase.pl* script.
Relevant specs:
MySQL version: mysql Ver 14.12 Distrib 5.0.51a, for debian-linux-gnu
(i486) using readline 5.2
OS: Debian Lenny
Failover server is virtual, running on VirtualBox 3.2.8, on an Ubuntu
10.4 host.
All GUI functions of the Koha failover server seem to operate correctly,
but when I run *mysqlcheck -ukoha -p koha* the check fails on
koha.biblioitems with the following error message:
mysqlcheck: Got error: 2013: Lost connection to MySQL server during
query when executing 'CHECK TABLE ... '
If I try mysqldump, I get the same error, but it is more specific,
reporting that it falls on row 41536.
If I check /var/log/syslog, I see this http://pastebin.com/YuuFBHry
"InnoDB: Database page corruption on disk or a failed file read of page
58164", etc.
Both mysqlcheck & mysqldump work without error on the live server, so
I'm thinking that something must be happening to the data during the
export or import that corrupts the InnoDB data, but this is speculation,
since I'm not a MySQL expert.
Has anyone seen behavior like this? Any suggestions for further
troubleshooting/resolution?
--
Cheers,
Christopher Curry
Assistant Technical Librarian / Assistant IT Officer
American Philosophical Society
105 South Fifth Street
Philadelphia, PA 19106-3386
Tel. (215) 599-4299
[email protected] <mailto:[email protected]>
Main Library number: (215)440-3400
APS website: http://www.amphilsoc.org
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