Hello raid team, First of all, thanks for your work. So i recently read about Linux raid5/raid6 write-cache and journaling and thought about giving it a try. I'm mainly interested in the additional safety provided by the journal but might want be future proof to use the write cache as well. I read how to create an array using a journal but i havent found the slightest indication of how large the respective device/partition should be. I went through the lwn article [1], the slides [2] of the respective engineers at facebook and a few commit messages. So my question is, let's assume i have a 6TB raid5 array (3x3TB), what would a good journal device size be? I'd probably went with 4GB, as this is kinda the upper bound of what hardware raid controller offer. Christian [1] https://lwn.net/Articles/665299/ [2] http://events.linuxfoundation.org/sites/events/files/slides/2016_vault_write_journal_cache_v2.pdf -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
