Re: [Bacula-users] Optimized mysql settings for CentOS 6 64bit

On 5 Oct 2011, at 14:23, Phil Stracchino <alaric AT metrocast DOT net> wrote:

On 10/05/11 05:07, Uwe Schuerkamp wrote:
Hi folks,

I'm wondering about the best mysql settings for our new bacula
installation which will be taking over from an older setup.

Current bacula db size is 55G, we have around 14TB backup data from
ca. 100 clients on disk storage ATM but this is expected to double in
the next year or so. the new machine has 6GB memory and reports 12
CPU cores. The bacula db is stored on an 8-drive RAID 5.

Backups will be going to an lto 5 library (24 Tapes) and 2 additional
16TB RAID devices which have yet to be installed (and I've not thought
up a good backup strategy yet ;-)

Would you recommend spooling and using bacula's batch insert in such a
setup?

I'm actually starting to question the value of batch insert for large
installations, because of the resulting table-level locks. We're seeing
jobs waiting hours to get their turn to do inserts. With InnoDB the
default storage engine in MySQL 5.5, I'm wondering whether overall
performance would be better with batch insert disabled and InnoDB
configured to allow interleaved auto-increment IDs.

Unfortunately, all the "enterprise" Linux distributions will probably
still be shipping MySQL 5.1 five years after MySQL 6.0 ships...

I've been using non-batch insertion with postgres (following your dare, I think, Phil) for about a year. Backups are only about 8TB, but it works extremely well for us.

Rory

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