How Much Disk Space Should I Allocate for the Security Server Logs?

Owned by Petteri Kivimäki
Last updated: Sept 14, 2023
1 min read

How much disk space should I allocate for the Security Server logs?

Each SOAP request contains 9.5 kB of metadata (SOAP namespace definitions, headers, signatures) and response message contains around 11.2 kB of metadata. Based on this, each successful query produces around 21 kB of metadata in the message log. In addition, once in a minute security server batch time-stamps all the messages processed since the previous time-stamp operation which generates additional 3.6 kB of metadata per minute.

Message log space requirements can be estimated using the formula below:

3.6kB + N * (21kB + R + A) = S

  • N = number of requests per minute

  • R = size of request payload in kB

  • A = size of response payload in kB

  • S = disk usage per minute (kB / min)

Example

Let's assume that a system receives 100 requests per minute. Request payload size is 4 kB and response payload size is 8 kB.

3.6 kB + 100 * (21 kB + 4 kB + 8 kB) = 3303.6 kB / min = 3.3 MB / min

This makes 4.8 GB per day and 143 GB per month.

In addition, archived message log records require around 43 % of the space required by the active message log records so the required disk space in total is:

  • 4.8 + 2.1 GB = 6.9 GB / day

  • 143 + 61 GB = 204 GB / month

  • 1716 + 738 GB = 2454 GB / year