Logging and stats - RAM or Flash?

j2zero · June 28, 2024, 9:16am

I am curious to know how the logs files of certain applications are handled. For example, the stats and logging that's generated via Adguard home, is that information stored in RAM? Could it be stored in RAM and then saved when a reboot command is triggered?

Router level logging etc, are they stored in RAM?

Can we modify any non critical logs to save in RAM or even just stop the logs if there of minor importance?

The reason I ask these questions is because of the embedded flash, it's not like we can just swap out a hard drive for example and reinstall when they eventually go bad.

I don't know what the read/writes values are in terms of longevity but my guess is the product would be obsolete before we even reached the point of the flash going bad.

admon · June 28, 2024, 9:18am

AdGuard logs are stored on the memory storage.
All logs about the device itself (kernel log, etc.) is already in RAM and flushed by reboot.

j2zero · June 28, 2024, 9:23am

Adguard holds a fair bit of information and obviously constantly writing about the queries being processed, I know I can disable stats and logs within adguard but they can be useful. Any guides to possibly move the adguard logs / stats to ram that you know of?

I am probably overthinking the whole writes limits etc but again, if a pi goes bad you just swap the SD card and re flash, that's not possible here.

admon · June 28, 2024, 9:24am

Guess this will help you, but never tried nor it's supported by GL:

github.com/AdguardTeam/AdGuardHome

Memory only databases option (stats , queries etc)

opened 04:38PM - 10 Jul 23 UTC

finBitorg

feature request

### Prerequisites - [X] I have checked the [Wiki](https://github.com/AdguardTea…m/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer - [X] I have searched other issues and found no duplicates - [X] I want to request a feature or enhancement and not ask a question ### The problem Adguard is writing a ton of queries to disk and this is often causes wear on SDCard with Raspberry pi. ### Proposed solution please add a configuration setting to keep the query cache and query stats "in memory only" since you already have a max cache size option anyway this should limit memory use to whatever user wants. I am totally ok with loosing the stats on occasional reboot as opposed to having the Sdcards fail ### Alternatives considered and additional information trying to set overlay FS on raspberrypi but this will not allow for adguard updates and uses more memory then an option to just store query data and cache in memory with a specified size limit

j2zero · June 28, 2024, 9:28am

Thanks I will give it a read. I suppose we are backed by the 2 year guarantee if the device should fail. I am using my brume 2 as my main router so it will constantly be getting hit with writes from adguard home so I guess time will tell.

Still be interesting to see if the glinet staff have any further input on the matter, they must have factored in any potential issues with writes killing the internal flash like it can happen when using a pi and SD card. I just always associate internal flash similar to that of a SD card in terms of quality/longevity.

bruce · July 1, 2024, 1:43am

Thanks for your interest in GL products.

There is the eMMC chip in the Brume 2 as the flash storage.

GL have used eMMC chips in some of our previous products, there have been no reports of this hardware issue. Please feel free to use it. Besides, it has a 2-year warranty as it is used normally.