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akiradeveloper / dm-writeboost

Log-structured Caching for Linux
GNU General Public License v2.0
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Is possible use dm-writeboost being a writeback for one disk ? #232

Closed Augusto7743 closed 2 years ago

Augusto7743 commented 2 years ago

Hello. I has installed dm-writeboost using Ubuntu repository. I not understand exactly means "log" write cache in software information. You is saying "log" is simply writeback for data file and file system metadata ? Well ... Is possible use dm-writeboost for create a writeback cache in RAM for use with only a one disk ? I want create 2 writeback cache for 2 partitions (/dev/sda2 and /dev/sda3) in one disk (HDD SATA). If is possible create the caches above has any option to select a defer time to flush data ?

Unhappily I not see any simple command to create the writeback cache thus I not understand if is possible or need a SSD disk for cache.

Thanks for your reply.

akiradeveloper commented 2 years ago

@Augusto7743 Unfortunately, I couldn't understand what you mean.

But for the first question

I not understand exactly means "log" write cache in software information. You is saying "log" is simply writeback for data file and file system metadata ?

You may have to understand the background. This document may help https://docs.google.com/presentation/d/1mDh5ct3OR-eRxBbci3LQgaTvUFx9WTLw-kkBxNBeTD8/edit?usp=sharing