topic Re: Does Splunk DBConnect's checkpoint file rotate? in All Apps and Add-ons

Does Splunk DBConnect's checkpoint file rotate?

msellery1619 — Tue, 29 Sep 2020 21:41:37 GMT

I understand that in DBConnect 3, the checkpoint file that tracks the Rising Column value is now stored in files under /opt/splunk/var/lib/splunk/modinputs/server/splunk_app_db_connect.

However, do these files rotate? They will get quite large after just a few months. Isn't the last timestamp the only timestamp that should matter in this file? Why is every timestamp stored? Thanks!

Re: Does Splunk DBConnect's checkpoint file rotate?

jcoates — Tue, 16 Oct 2018 18:52:33 GMT

the checkpoint files do rotate -- I don't recall the size and time limits for individual files, but there's a maximum of 100MB for the entire folder.

Re: Does Splunk DBConnect's checkpoint file rotate?

msellery1619 — Tue, 16 Oct 2018 19:05:44 GMT

Thanks! I won't be in a position to test this with my own eyes for a while, but I'll take this at face value and consider it answered. Do you happen to know if the current file is always named the exact same file name? Thanks!

Re: Does Splunk DBConnect's checkpoint file rotate?

jcoates — Tue, 16 Oct 2018 19:25:07 GMT

yes, it's based on the input name. It'll always be the same file, the rotation is just to drop old lines and add new ones. It doesn't gzip off old copies.

Re: Does Splunk DBConnect's checkpoint file rotate?

harsmarvania57 — Wed, 17 Oct 2018 09:05:58 GMT

@jcoates is right, I was wrong. While looking at db_inputs.conf.spec the configuration is available to setup checkpoint file size but I never tested this.

max_single_checkpoint_file_size = <integer>
# optional
# Max checkpoint file size before archiving checkpoint file in bytes.  Default is 10MB, max is 100MB.

Re: Does Splunk DBConnect's checkpoint file rotate?

bschaap — Mon, 17 Dec 2018 13:39:13 GMT

I'm unable to get DB Connect to honor this setting and it's not rotating files larger than the max file size. I have tried using both the default size and the specifying the max size but neither work.

I am interested in whether this works or does not work for others.