Risk of writing querylog to router flash

[timkgh]

From reading about router flash, it seems they use low quality flash with low endurance. This makes sense to keep costs down and also because routers should not be writing a lot, just occasional firmware updates, configuration changes. Logs normally go to tmpfs which is in-memory.

Should we be concerned about putting querylog.json on actual flash rather than in-memory tmpfs? Mine for example seems to produce about 400-500MB per month, but I don't have a sense what is too many writes.

[timkgh]

It seems that log rotation only keeps one old file. So if you set log rotation to 7 days, you actually have 14 days of logs and hence 2x used space than you might expect.