[Snort-users] Snort/Barnyard2 performance with remote DB

Martin Holste mcholste at ...11827...
Mon Feb 27 14:29:19 EST 2012

My point was that Barnyard performance is largely irrelevant.  Do you
have some reason to believe it is not performing well?

In any case, you are essentially asking for an alerts-per-second
statistic, which you could get manually with:
SELECT COUNT(*) AS count, timestamp FROM event WHERE timestamp >
That will show you alerts-per-second for the last minute.

On Mon, Feb 27, 2012 at 1:22 PM, turki <turki_00 at ...131...> wrote:
> I am 100% convinced (and this what I am implementing right now) that using
> barnyard2 is more appropriate to insert alerts to DB rather than leaving
> this process to Snort by itself.
> However, maybe I need to further explain my question:
> How can I evaluate/measure barnyard's INSERT process to remote DB? or in
> other words, how can we measure the throughput or the performance of
> barnyard2 while shipping alerts to remote database.
> I would imagine something like barnyard ability to send alerts/seconds
> factor or something....
> Thank you,
> Turki
> ________________________________
> From: Martin Holste <mcholste at ...11827...>
> To: Joel Esler <jesler at ...1935...>
> Cc: turki <turki_00 at ...131...>; "snort-users at lists.sourceforge.net"
> <snort-users at lists.sourceforge.net>
> Sent: Monday, February 27, 2012 12:05:14 PM
> Subject: Re: [Snort-users] Snort/Barnyard2 performance with remote DB
> Since you're already using Barnyard2, Turki, it sounds like you're
> wondering if you should be concerned with Snort performance or
> Barnyard's INSERT performance.  The answer is that you should be
> concerned solely with Snort performance in almost all scenarios.
> Barnyard will INSERT as fast as it can, and since the data is safely
> on disk already as it does this, if it gets behind for a few minutes
> or hours, it's generally not a major issue.  However, if your alert
> volume is so great that you are overwhelming Barnyard, then your
> problem is not actually Barnyard but that you are alerting too much.
> That means you need to tune your rule set.  More than about 10 alerts
> per second is more than most small or medium networks generate, and
> more than 100 alerts per second is highly unusual and probably
> indicates a tuning problem.
> On Mon, Feb 27, 2012 at 10:01 AM, Joel Esler <jesler at ...1935...> wrote:
>> On Feb 27, 2012, at 10:24 AM, turki wrote:
>> Hello Snort users,
>> I am using Snort ( and Barnyard2 (1.9) with a configuration that
>> sends alerts to a database. MySql DB is the storage unit to save these
>> alerts and it is in separate machine from the Snort/Barnyard2 machine.
>> my question,
>> Is there a way to evaluate the performance of sending alerts from
>> Snort/Barnyard2 to a remote DB?
>> Is the focus here to monitor the throughput of the Snort node or the DB
>> node?
>> any recommended benchmark tools for such experiment?
>> So, a couple of thoughts here that may point you in the right direction.
>> Snort, when outputting directly to DB has to stop being an IDS in order to
>> "INSERT" into the db.  That's not generally a good thing!
>> We recommend using Snort to output to unified2 and having barnyard2 input
>> into the DB.  We are actually going to be removing the direct-to-db output
>> from Snort in the next major release (2.9.3)
>> Joel
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