Question about spiffs_obj_id sizing

[JCWren]

I have a board with a 16MB flash on it. When I configured SPIFFS way back when I declared spiffs_obj_id as a uint16_t. The system has been working well enough for a long time, but I also don't create a lot files. There's normally about 20 files, and one of them is a large file that's basically a database that gets a fair number of writes to it. As I was looking at the configuration for a different reason, it appears I should have declared spiffs_obj_id to be a uint32_t.

What are the implications of it being too small? I've spent a while trying to follow what happens to obj_id, but there's so many references to it in different structures that it rapidly gets confusing to keep track of what's what.

As near as I can suss out, as long as I have less than 32766 files ('objects') on the file system, I should be OK?

Thanks!

[Peter Andersson]

Hi, If I recall correctly, the msb is an index bit, so max nbr of files is 16383. Magnitudes around 20 files should definitely be ok. Den tors 11 nov. 2021 00:51JCWren ***@***.***> skrev:

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I have a board with a 16MB flash on it. When I configured SPIFFS way back when I declared spiffs_obj_id as a uint16_t. The system has been working well enough for a long time, but I also don't create a lot files. There's normally about 20 files, and one of them is a large file that's basically a database that gets a fair number of writes to it. As I was looking at the configuration for a different reason, it appears I should have declared spiffs_obj_id to be a uint32_t. What are the implications of it being too small? I've spent a while trying to follow what happens to obj_id, but there's so many references to it in different structures that it rapidly gets confusing to keep track of what's what. As near as I can suss out, as long as I have less than 32766 files ('objects') on the file system, I should be OK? Thanks! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#283>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABG42V5RM4L6EZMGTMSKCJTULMAOJANCNFSM5HZFMLQQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.